CN214749344U - Elastic modulus measuring device - Google Patents
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- CN214749344U CN214749344U CN202120875464.2U CN202120875464U CN214749344U CN 214749344 U CN214749344 U CN 214749344U CN 202120875464 U CN202120875464 U CN 202120875464U CN 214749344 U CN214749344 U CN 214749344U
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Abstract
The utility model discloses an elasticity modulus measuring device, include: the base, brace table and loading piece, be equipped with accommodation space in the base, the brace table is located in the accommodation space, the one side that the brace table is used for supporting the test piece is the holding surface, be equipped with first support piece and the second support piece of interval arrangement in proper order on the holding surface, the face towards the holding surface on the base is the butt face, the butt face is equipped with first butt piece and the second butt piece of interval arrangement in proper order on the first direction, the equal butt of first butt piece and second butt piece deviates from the side of holding surface on the test piece, first support piece and second support piece all are located between first butt piece and the second butt piece, the one end butt of loading piece deviates from the one side of holding surface at the brace table, the loading piece is used for exerting pressure to the brace table. The measuring device can effectively improve the stability of the measuring result.
Description
Technical Field
The utility model belongs to the technical field of the detection and measurement technique and specifically relates to an elasticity modulus measuring device is related to.
Background
The elastic modulus, as an important parameter for describing the mechanical properties of the material, is a measure of the resistance of the balancing body to elastic deformation, and is related only to the chemical composition of the material, not to its structural changes, and not to the heat treatment state. At present, the elastic modulus measurement method includes a static measurement method, a resonance method, a pulse method, and the like. The resonance method and the pulse method have higher measurement accuracy, but the measurement process is more complex and has higher requirements on instruments, so the application of the methods is more limited. The static measurement method is simple and is one of the most common measurement methods at present.
The static measurement method is to measure the stress and strain of an object after the object is loaded, and calculate the elastic modulus E according to a specific formula, and mainly comprises a stretching method and a straight beam bending method. The common straight beam bending method is that one end of a metal material to be measured is fixed on a wall or a test bench, a downward acting force is applied to the other end of the metal material, the bending amount of the metal material under the force is measured, and the elastic modulus of the metal material is calculated through a formula.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide an elastic modulus measuring apparatus, which can effectively improve the stability of the measurement result.
An elastic modulus measuring apparatus comprising: the test device comprises a base, a supporting table and a loading piece, wherein an accommodating space is arranged in the base, the supporting table is arranged in the accommodating space, one surface of the supporting table, which is used for supporting a test piece, is a supporting surface, a first supporting piece and a second supporting piece which are sequentially arranged in a first direction at intervals are arranged on the supporting surface, the surface of the base, which faces the supporting surface, is an abutting surface, the abutting surface is provided with a first abutting piece and a second abutting piece which are sequentially arranged in the first direction at intervals, the first abutting piece and the second abutting piece are both abutted against the side surface, which deviates from the supporting surface, of the test piece, the first supporting piece and the second supporting piece are both positioned between the first abutting piece and the second abutting piece, and the distance between the first supporting piece and the first abutting piece in the first direction is one fourth of the distance between the first abutting piece and the second abutting piece, the distance between the second supporting piece and the second abutting piece is one fourth of the distance between the first abutting piece and the second abutting piece, one end of the loading piece abuts against one surface, deviating from the supporting surface, of the supporting platform, and the loading piece is used for applying pressure to the supporting platform.
When the elastic modulus measuring device is used, the supporting platform and the first supporting piece and the second supporting piece which are arranged on the supporting platform are arranged in the accommodating space, the testing piece is arranged on the first supporting rod and the second supporting rod, and a loading piece is utilized to apply pressure to the supporting platform, so that the supporting platform moves in the accommodating space. Because the abutting surface on the base is provided with the first abutting piece and the second abutting piece which are arranged at opposite intervals, the first abutting piece and the second abutting piece are abutted against the side surface, deviating from the supporting surface, of the test piece, the first supporting piece and the second supporting piece are both positioned between the first abutting piece and the second abutting piece, in the first direction, the distance between the first supporting piece and the first abutting piece is one fourth of the distance between the first abutting piece and the second abutting piece, and the distance between the second supporting piece and the second abutting piece is one fourth of the distance between the first abutting piece and the second abutting piece. Therefore, after the test piece is subjected to the pressure exerted by the loading piece, the deformation of the two ends of the test piece is symmetrical, so that the shearing force of the test piece on the area section between the first supporting piece and the second supporting piece is 0, and meanwhile, an operator can obtain the elastic modulus of the test piece through simple formula calculation according to the pressure exerted by the loading piece and the deformation of the test piece.
The technical solution is further explained below:
in one embodiment, the abutting surface is provided with a yielding groove, and the yielding groove is positioned between the first abutting piece and the second abutting piece; and/or, the base is provided with a notch, the notch is communicated with the accommodating space, and the notch is positioned between the first abutting part and the second abutting part.
In one embodiment, the first support member and the second support member are support rods, and a groove is arranged at a position on the support platform, which is in contact with the support rods, and the groove is arranged along the length direction of the support rods.
In one embodiment, the accommodating space is a through hole arranged in the base, the supporting platform is arranged in the through hole, and the penetrating direction of the through hole is parallel to the length direction of the supporting rod.
In one embodiment, the pressure sensor is sandwiched between the loading part and the support table, and the pressure sensor is used for measuring the value of the pressure applied to the support table by the loading part.
In one of them embodiment, still include the backup pad, the backup pad is located between pressure sensor and the loading piece, just pressure sensor arranges in the middle part position of backup pad, be equipped with two first connecting holes in the backup pad, and two first connecting hole is located respectively pressure sensor's both sides, the brace table corresponds two the position of first connecting hole all is equipped with the stand, just the bottom of base is equipped with the confession the second connecting hole that the stand passed, the stand passes in proper order first connecting hole with the second connecting hole, with base sliding connection.
In one embodiment, the loading part comprises an abutting rod and a plurality of holding rods, one end of the abutting rod penetrates through the bottom of the base to abut against the supporting plate, the other end of the abutting rod is provided with the holding rods, and the plurality of holding rods are arranged at intervals along the circumferential direction of the abutting rod.
In one embodiment, the side wall of the pressing rod is provided with an external thread, the bottom of the base is provided with a through hole for the pressing rod to pass through, the side wall of the through hole is provided with an internal thread matched with the external thread, and the pressing rod is in threaded connection with the base.
In one embodiment, the test device further comprises a resistance strain gauge and a strain gauge, wherein the resistance strain gauge is attached to the test piece and is positioned on an area section of the test piece between the first support piece and the second support piece, and the resistance strain gauge is electrically connected with the strain gauge.
In one embodiment, the base further comprises a base, the base comprises a first side plate, a bottom plate and a second side plate, the first side plate and the second side plate are arranged on the bottom plate at intervals, clamping grooves are formed in one side of the first side plate facing the second side plate and one side of the second side plate facing the first side plate, and two ends of the base are clamped in the two clamping grooves respectively.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Furthermore, the drawings are not to scale of 1:1, and the relative dimensions of the various elements in the drawings are drawn only by way of example and not necessarily to true scale. In the drawings:
fig. 1 is a schematic structural diagram of an elastic modulus measuring device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of another view angle of the elastic modulus measuring device in an embodiment of the present invention;
fig. 3 is an exploded view of the structure of the elastic modulus measuring device according to an embodiment of the present invention;
fig. 4 is a schematic view of a simple beam model, a shear force schematic view and a bending moment schematic view equivalent to the test piece in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a Wheatstone bridge balance.
The elements in the figure are labeled as follows:
10. an elastic modulus measuring device; 110. a base; 111. an accommodating space; 112. a notch; 113. a second connection hole; 114. perforating; 120. a support table; 121. a support surface; 122. a groove; 130. a loading member; 131. a pressing rod; 132. a holding rod; 141. a first support member; 142. a second support member; 151. a first abutting member; 152. a second abutting member; 160. a pressure sensor; 170. a support plate; 171; a first connection hole; 172. a limiting groove; 180. a column; 190. a base; 191. a first side plate; 192. a base plate; 193. a second side plate; 194. a clamping groove; 20. and (6) testing the test piece.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
Referring to fig. 1 and fig. 2, an embodiment of the present application provides an elastic modulus measuring apparatus 10, including: a base 110, a support table 120, and a loader 130. The base 110 has an accommodating space 111 therein, and the support table 120 is disposed in the accommodating space 111. One surface of the supporting platform 120 for supporting the test piece 20 is a supporting surface 121, and a first supporting member 141 and a second supporting member 142 are disposed on the supporting surface 121 and spaced in sequence in the first direction. The surface of the base 110 facing the support surface 121 is an abutment surface (not shown in the figures) provided with a first abutment 151 and a second abutment 152 arranged at intervals in sequence in the first direction. The first abutment member 151 and the second abutment member 152 each abut against a side of the test piece 20 facing away from the support surface 121. In other words, the first support 141 and the second support 142 are abutted against one side of the test piece 20, and the first abutting piece 151 and the second abutting piece 152 are abutted against the other side of the test piece 20.
Further, the first support 141 and the second support 142 are both located between the first abutment 151 and the second abutment 152. In the first direction, the distance between the first support 141 and the first abutment 151 is a quarter of the distance between the first abutment 151 and the second abutment 152, and the distance between the second support 142 and the second abutment 152 is a quarter of the distance between the first abutment 151 and the second abutment 152. One end of the loading element 130 abuts against a surface of the supporting platform 120 facing away from the supporting surface 121, and the loading element 130 is used for applying pressure to the supporting platform 120.
When the above-described elastic modulus measuring apparatus is used, the supporting stage 120 and the first and second supports 141 and 142 provided on the supporting stage 120 are placed in the accommodating space 111, the test piece 20 is placed on the first and second supports 141 and 142, and the supporting stage 120 is moved in the accommodating space 111 by applying pressure to the supporting stage 120 by the loading piece 30. Because the abutting surface on the base 110 is provided with the first abutting part 151 and the second abutting part 152 which are oppositely arranged at intervals, and the first abutting part 151 and the second abutting part 152 are abutted against the side surface of the test piece 20 which is far away from the supporting surface, the first supporting part 141 and the second supporting part 142 are both positioned between the first abutting part 151 and the second abutting part 152, in the first direction, the distance between the first supporting part 141 and the first abutting part 151 is a quarter of the distance between the first abutting part 151 and the second abutting part 152, and the distance between the second supporting part 142 and the second abutting part 152 is a quarter of the distance between the first abutting part 151 and the second abutting part 152. Therefore, after the test piece 20 is pressed by the loading member 130, the deformation of the test piece 20 at both ends is symmetrical, so that the shearing force of the test piece 20 in the region between the first supporting member 141 and the second supporting member 142 is 0, and the operator can obtain the elastic modulus of the test piece 20 by simple formula calculation according to the pressure applied by the loading member 130 and the deformation of the test piece 20.
Optionally, the first abutment 151 and the second abutment 152 are fixed on the abutment surface. For example, the first abutment member 151 and the second abutment member 152 are integrally formed on the abutment surface. For another example, the first abutting member 151 and the second abutting member 152 are fixed on the abutting surface by gluing. Thus, the first abutting member 151 and the second abutting member 152 are prevented from falling off during the stress process.
Optionally, the first abutment 151 and the second abutment 152 are detachably placed on the abutment surface. For example, the first and second abutment members 151 and 152 are connected to the abutment surfaces by snap or screw means. For another example, the first contact member 151 and the second contact member 152 may be connected to the contact surface by another method.
Alternatively, both the first and second abutments 151 and 152 may be abutment fulcrums. Alternatively, the first abutting part 151 and the second abutting part 152 can be abutting rods.
Alternatively, the first support 141 and the second support 142 may be support fulcrums.
In order to prevent the first support 141 and the second support 142 from moving when placed on the supporting surface 121 or prevent the first support 141 and the second support 142 from moving during the pressing process, the first support 141 and the second support 142 may be supporting rods.
In order to improve the abutment stability of the first abutment 151 and the second abutment 152, in particular, in the present embodiment, the first abutment 151 and the second abutment 152 are both pin rods. Thus, the contact area between the first abutting part 151 and the second abutting part 152 and the test piece 20 is increased, and the test piece 20 is prevented from being separated in the abutting process.
In addition to the above embodiments, in an embodiment, the abutting surface is provided with an avoiding groove (not shown). And the relief groove is located between the first abutment 151 and the second abutment 152. In this way, after the test piece 20 is subjected to the forces applied by the first and second supports 141 and 142, the test piece 20 is deformed and bent into the relief groove. It can be seen that the offset groove can make the test piece 20 have a space around it for the test piece 20 to deform.
Referring to fig. 2, in another embodiment, the base 110 is provided with a notch 112. The notch 112 communicates with the receiving space 111, and the notch 112 is located between the first abutment 151 and the second abutment 153. In this way, after the test piece 20 is subjected to the forces applied by the first support 141 and the second support 142, the test piece 20 is deformed and bent toward the notch 112. It can be seen that the gap 112 allows a space around the test piece 20 for the deformation of the test piece 20. In addition, the gap 112 is located between the first abutting member 151 and the second abutting member 152, so as to prevent the testing member 20 from falling off from the accommodating space 111 during the pressing and stress process.
Specifically, referring to fig. 3, in an embodiment, the first supporting member 141 and the second supporting member 142 are supporting rods. And a groove 122 is formed at a position of the support platform 120, which is abutted against the support rod. The grooves 122 are arranged along the length of the strut. Therefore, the first supporting member 141 and the second supporting member 142 can be stably disposed on the supporting table 120, and the first supporting member 141 and the second supporting member 142 are prevented from moving left and right to affect the extrusion of the test piece 20. Meanwhile, in the whole pressing process, in the first direction, the distance between the first supporting member 141 and the first abutting member 151 is always one fourth of the distance between the first abutting member 151 and the second abutting member 152, and the distance between the second supporting member 142 and the second abutting member 152 is always one fourth of the distance between the first abutting member 151 and the second abutting member 152, so that the measurement accuracy is ensured.
Referring to fig. 1, in the above embodiment, the accommodating space 111 is a through hole disposed in the base 110. The support platform 120 is disposed in the through hole, and the penetrating direction of the through hole is parallel to the length direction of the support rod. In this way, when the operator performs measurement on the test piece 20, the operator can directly place the test piece 20 on the first support 141 and the second support 142 through the through hole. Therefore, an operator can take the test piece 20 conveniently, and the measurement efficiency is improved.
In order to accurately obtain the pressure applied by the loading unit 130 to the supporting table 120, please refer to fig. 1 and fig. 2, in addition to the above embodiment, in an embodiment, the elastic modulus measuring apparatus 10 further includes a pressure sensor 160. The pressure sensor 160 is interposed between the loading member 130 and the supporting stage 120, and the pressure sensor 160 is used for measuring a value of the pressure applied to the supporting stage 120 by the loading member 130. In this manner, the pressure sensor 160 may display the pressure value applied by the loading member 130 in real time.
In order to improve the accuracy of the measurement result of the pressure sensor 160, please continue to refer to fig. 1 and fig. 2, further, in an embodiment, the elastic modulus measuring apparatus 10 further includes a supporting plate 170. The support plate 170 is located between the pressure sensor 160 and the loading member 130. And the pressure sensor 160 is disposed at a middle position of the support plate 170. Therefore, the abutting force received by the support table 120 is more uniform, the pressure received by the first support member 141 and the pressure received by the second support member 142 are the same, the force can be uniformly applied to the test piece 20, the uniformity of the force received by the test piece 20 is ensured, and the accuracy of the measurement result is improved.
In order to ensure the stability of the supporting stage 120 during the movement process, please refer to fig. 1 to 3, further, two first connection holes 171 are disposed on the supporting plate 170. And two first connection holes 171 are respectively located at both sides of the pressure sensor 160. The support table 120 is provided with columns 180 at positions corresponding to the two first connection holes 171. The bottom of the base 110 is provided with a second connection hole 113 for the pillar 180 to pass through, and the pillar 180 passes through the first connection hole 171 and the second connection hole 113 in sequence and is slidably connected with the base 110. Therefore, the error of the measurement result caused by the left-right or front-back deviation of the support table 120 in the moving process is avoided.
Optionally, referring to fig. 3, a limiting groove 172 is disposed on a surface of the supporting plate 170, which is attached to the pressure sensor 160. The shape and size of the stopper groove 172 are adapted to the shape and size of the pressure sensor 160, so that the pressure sensor 160 can be stably seated on the support plate 170.
With continued reference to fig. 1 and 2, in one embodiment, the loading element 130 includes a pressing rod 131 and a holding rod 132. One end of the pressing rod 131 penetrates the bottom of the base 110 and presses against the supporting plate 170. The other end of the pressing rod 131 is provided with a holding rod 132. The holding rods 132 are provided in plurality, and the plurality of holding rods 132 are arranged at intervals along the circumferential direction of the pressing rod 131. Thus, it is convenient for the user to hold the holding rod 132 to rotate the pressing rod 131 to move upward or downward.
Specifically, referring to fig. 3, in the present embodiment, the sidewall of the pressing rod 131 is provided with an external thread (not shown). The bottom of the base 110 is provided with a through hole 114 for the pressing rod 131 to pass through, and the sidewall of the through hole 114 is provided with an internal thread (not shown) matching with the external thread, and the pressing rod 131 is in threaded connection with the base 110. Thus, when the pressing rod 131 is not rotated due to the engagement of the threads, the pressing rod 131 is stably and continuously pressed against the supporting plate 170. Meanwhile, the loading unit 130 applies pressure to the supporting table 120 from the bottom of the base 110, so that the gravity of the loading unit 130 can be prevented from influencing the pressure applied to the test piece 20. In addition, by adopting the thread fit, the pressure value applied by stepless adjustment can be realized by rotating the abutting rod 131, and the elastic modulus of the test piece 20 under different acting forces can be tested for many times, so that the accuracy of the measurement result is ensured.
In order to obtain the strain value of the test piece 20 under pressure, on the basis of the above embodiments, in one embodiment, the elastic modulus measuring device 10 further includes a resistance strain gauge (not shown) and a strain gauge (not shown). The resistance strain gauge is attached to the testing part 20, and the resistance strain gauge is located on the area section of the testing part 20 between the first supporting member 141 and the second supporting member 142. The resistance strain gauge is electrically connected with the strain gauge.
With continued reference to fig. 1-3, in one embodiment, the elastic modulus measuring device 10 further includes a base 190. The base includes a first side plate 191, a bottom plate 192, and a second side plate 193. The first side plate 191 and the second side plate 193 are oppositely arranged on the bottom plate 192 at intervals. And one side of the first side plate 191 facing the second side plate 193 and one side of the second side plate 193 facing the first side plate 191 are both provided with a clamping groove 194. The two ends of the base 110 are respectively clamped in the two clamping grooves 194. The first side plate 191 and the second side plate 193 are disposed at an interval, and the base 110 can be accommodated in a cavity surrounded by the first side plate 191, the bottom plate 192 and the second side plate 193, so that a user can rotate the holding rod 132 in the cavity under the supporting action of the base 190, so that the pressing rod 131 rotates upwards or downwards.
Optionally, a clamping member is arranged in the clamping groove 194. When the base 110 slides into the engaging groove 194, the engaging member locks the base 110, so that the base 110 is fixedly connected to the base 190.
In the use of the apparatus 10, the test piece 20 is placed on the first support 141 and the second support 142, the loading member 130 applies pressure to the support plate 170, and the support plate 170 transmits the pressure to the pressure sensor 160, the support table 120, the first support 141, and the second support 142 in sequence, and finally acts on the test piece 20. The test piece 20 is deformed under the abutting action of the first supporting member 141, the second supporting member 142, the first abutting member 151 and the second abutting member 152, and at this time, the stress condition of the test piece 20 can be simplified into a simply supported beam model, as shown in fig. 4. In this process, if the pressure detected by the pressure sensor 160 is F, the pressure P applied to the test piece 20 at the first support 141 (point C) and the second support 142 (point D) is F/2. At this time, the first abutting member 151 can be regarded as point a, and the second abutting member 152 can be regarded as point B, where a is the moment arm and L is the lower span. Since the distance between the first support 141 and the first abutment 151 is a quarter of the distance between the first abutment 151 and the second abutment 152 in the first direction, the distance between the second support 142 and the second abutment 152 is a quarter of the distance between the first abutment 151 and the second abutment 152. At this time, the shear force diagram and the bending moment diagram of the test piece 20 are shown in fig. 4. As can be seen from the figure, the test piece 20 is a pure bending section (shearing force is 0) in the section of the region between the first support 141 and the second support 142) The calculation formula of the stress in pure bending is as follows: M/I, where M is a bending moment of the cross section of the test piece 20 at any point in the section between the first support 141 and the second support 142, and I is an inertia moment of the cross section of the test piece to the central axis. Wherein M is Pxa is PL/4, and I is bh312 (as shown in FIG. 3, b is the width of the test piece 20 and h is the thickness of the test piece 20). In this way, the stress of the test piece 20 at any point in the section between the first support 141 and the second support 142 can be known.
Since the area of the test piece 20 between the first support member 141 and the second support member 142 is selected when measuring the stress of the test piece 20, the test piece 20 in the area is also selected when measuring the strain of the test piece 20, and thus, the resistance strain gauge can be arranged at any point in the area between the first support member 141 and the second support member 142. When the test piece 20 deforms under the pressure applied by the loading member 130, the resistance value in the resistance strain gauge changes, so that the voltage of the resistance strain gauge changes accordingly. Because the resistance strain gauge is electrically connected with the strain gauge, the strain gauge can directly calculate the strain value of the testing piece 20 according to the voltage change of the resistance strain gauge. Wherein, the strain gauge measures the voltage change of the resistance strain gauge by utilizing the balance principle of a Wheatstone bridge, specifically, the balance principle of the Wheatstone bridge is shown in FIG. 5, and a resistor R1、R2、R3、R4Is four bridge arms, UBDTo output a voltage, UACIs an input voltage, then passes through a resistor R1The current of (a) is:
resistance R1The voltages at both ends are:
similarly, the resistance R4The voltages at both ends are:
thus, the output voltage at terminal B, D is:
when R is1R2＝R3R4Or R1＝R2＝R3＝R4Time, output voltage UBDAt 0, the Wheatstone bridge is in equilibrium. In this application, adjust to R1＝R2＝R3＝R4The resistance strain gauge on the test piece 20 is denoted as R1The test piece 20 makes the resistance increment generated by the resistance strain gauge under the action of the pressure P be Delta R1And R is2、R3、R4The resistance is fixed and is not influenced by deformation, and at the moment, the output voltage formula can be abbreviated as:
wherein epsilon is the strain of the test piece 20 under the action of the pressure P,
is constant and constant K is provided by the manufacturer. From the above formula, the output voltage and Δ R can be obtained1And is proportional to the strain epsilon. In the present application, by measuring the stress value and the strain value of the test piece 20, finally, by the elastic modulus calculation formula: e ═ σ/∈, the elastic modulus of the test piece 20 was obtained.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An elastic modulus measuring apparatus, comprising: the test device comprises a base, a supporting table and a loading piece, wherein an accommodating space is arranged in the base, the supporting table is arranged in the accommodating space, one surface of the supporting table, which is used for supporting a test piece, is a supporting surface, a first supporting piece and a second supporting piece which are sequentially arranged in a first direction at intervals are arranged on the supporting surface, the surface of the base, which faces the supporting surface, is an abutting surface, the abutting surface is provided with a first abutting piece and a second abutting piece which are sequentially arranged in the first direction at intervals, the first abutting piece and the second abutting piece are both abutted against the side surface, which deviates from the supporting surface, of the test piece, the first supporting piece and the second supporting piece are both positioned between the first abutting piece and the second abutting piece, and the distance between the first supporting piece and the first abutting piece in the first direction is one fourth of the distance between the first abutting piece and the second abutting piece, the distance between the second supporting piece and the second abutting piece is one fourth of the distance between the first abutting piece and the second abutting piece, one end of the loading piece abuts against one surface, deviating from the supporting surface, of the supporting platform, and the loading piece is used for applying pressure to the supporting platform.
2. The elastic modulus measuring device of claim 1, wherein the abutting surface is provided with a relief groove, and the relief groove is positioned between the first abutting piece and the second abutting piece;
and/or, the base is provided with a notch, the notch is communicated with the accommodating space, and the notch is positioned between the first abutting part and the second abutting part.
3. The apparatus according to claim 1, wherein the first support and the second support are support bars, and a groove is provided at a position of the support table that is in contact with the support bars, and the groove is arranged along a length direction of the support bars.
4. The apparatus for measuring elastic modulus according to claim 3, wherein the accommodating space is a through hole provided in the base, the support table is provided in the through hole, and a penetrating direction of the through hole is parallel to a length direction of the support rod.
5. The apparatus according to claim 1, further comprising a pressure sensor interposed between the loading member and the support table, the pressure sensor being configured to measure a value of the pressure applied to the support table by the loading member.
6. The apparatus of claim 5, further comprising a supporting plate, wherein the supporting plate is located between the pressure sensor and the loading member, the pressure sensor is disposed at a middle position of the supporting plate, two first connecting holes are disposed on the supporting plate, the two first connecting holes are respectively located at two sides of the pressure sensor, a stand is disposed at a position of the supporting plate corresponding to the two first connecting holes, a second connecting hole for the stand to pass through is disposed at a bottom of the base, and the stand sequentially passes through the first connecting hole and the second connecting hole and is slidably connected to the base.
7. The apparatus according to claim 6, wherein the loading member includes an abutting rod and a holding rod, one end of the abutting rod penetrates through the bottom of the base to abut on the supporting plate, the other end of the abutting rod is provided with the holding rod, the holding rods are provided in plurality, and the plurality of holding rods are arranged at intervals along a circumferential direction of the abutting rod.
8. The apparatus for measuring elastic modulus according to claim 7, wherein the side wall of the pressing rod is provided with an external thread, the bottom of the base is provided with a through hole for the pressing rod to pass through, the side wall of the through hole is provided with an internal thread adapted to the external thread, and the pressing rod is in threaded connection with the base.
9. A modulus of elasticity measuring device according to any one of claims 1 to 8, further comprising a resistance strain gauge attached to the test piece and located on an area section of the test piece between the first support member and the second support member, and a strain gauge electrically connected to the resistance strain gauge.
10. The apparatus according to any one of claims 1 to 8, further comprising a base, wherein the base includes a first side plate, a bottom plate and a second side plate, the first side plate and the second side plate are disposed on the bottom plate at a relative interval, and both a side of the first side plate facing the second side plate and a side of the second side plate facing the first side plate are provided with a clamping groove, and two ends of the base are respectively clamped in the two clamping grooves.
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| CN202120875464.2U CN214749344U (en) | 2021-04-26 | 2021-04-26 | Elastic modulus measuring device |
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| CN202120875464.2U CN214749344U (en) | 2021-04-26 | 2021-04-26 | Elastic modulus measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113109134A (en) * | 2021-04-26 | 2021-07-13 | 东风本田发动机有限公司 | Elastic modulus measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109134A (en) * | 2021-04-26 | 2021-07-13 | 东风本田发动机有限公司 | Elastic modulus measuring device |
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