CN101696958B - Method and device for supporting sample of pulse excitation method elasticity modulus tester - Google Patents
Method and device for supporting sample of pulse excitation method elasticity modulus tester Download PDFInfo
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- CN101696958B CN101696958B CN2009100662307A CN200910066230A CN101696958B CN 101696958 B CN101696958 B CN 101696958B CN 2009100662307 A CN2009100662307 A CN 2009100662307A CN 200910066230 A CN200910066230 A CN 200910066230A CN 101696958 B CN101696958 B CN 101696958B
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Abstract
The invention discloses a method for supporting a sample of a pulse excitation method elasticity modulus tester. In the method, three supporting points are arranged below the sample, a supporting device is arranged on the lower parts of the supporting points, and the supporting device is in point contact with the supporting points; and the positions of the three supporting points are that a supporting point A is arranged on one side from the length direction of the sample, two supporting points B and C are arranged at one end on the other side from the length direction of the sample, and the supporting point A and the supporting points B and C can be interchanged on two sides of the length direction of the sample. The supporting device can also comprise a left supporting pipe (81), a right supporting pipe (82), a base (9) and metal wires (71 and 72) arranged on the two supporting pipes. The method and the device have the following advantages that: through the three-point type supporting below the sample, at the room temperature or a high temperature, a young modulus (E) and a shear modulus (G) can be measured synchronously in a same supporting mode, the difficulty that the young modulus and the shear modulus are difficult to be tested synchronously at a high temperature is solved, the supporting device is unnecessary to be changed in the test process, the operation is simple and convenient, the possible errors caused by complicated operations are avoided, and the efficiency is improved.
Description
Technical field
The present invention relates to test a kind of testing tool of solid material normal temperature or high-temperature elastic modulus, particularly a kind of sample support method and device of pulse excitation method elasticity modulus tester.
Background technology
Fire resistive material and other Inorganic Non-metallic Materials are subjected to external force to do time spent generation distortion in its elastic limit, work as external force
After removing, still can return to original shape, this moment, the ratio of stress and strain was called its elastic modulus.Elastic modulus generally comprises Young modulus (E is also referred to as bending modulus), modulus of shearing (G).Fire resistive material Determination of Modulus method generally is divided into static method (mainly being the dead weight method) and dynamic method (mainly being resonant method); Static method is destructive the detection, is difficult to repeated authentication; Dynamic method is Non-Destructive Testing, can be at the elastic modulus that guarantees to measure rapidly and accurately under the injury-free situation of material material.Dynamic method is widely used in the world a kind of method.
The dynamic method test mainly is divided into pulse excitation method, audio method, sound velocity method.
Unite States Standard (USS) ASTM C 885 is the audio method standard, and ASTM C 1419 is the sound velocity method standard; ASTM C 1548-02, international standard ISO 12680-1 and German DIN EN ISO 12680-1 are pulse excitation method, all recommended Young modulus (E) and (or) the normal temperature proving installation of modulus of shearing (G), for high temperature Young modulus (E) and (or) test of shear at high temperature modulus (G), just in its standard, mention and can adopt its method, but high temperature test device and the hints on operation not stipulating or propose to supply to implement.
Requirement to the sample support system in the relevant criterion is: support system should be allowed sample free vibration, and does not limit desired vibration mode.Recommend in the method to use: the sample support thing can adopt soft or hard material, and stilt should have the sharp-pointed edge of a knife or the surface is cylindrical to be used to support sample.Supporting way is: Young modulus (E) adopts two parallel supporter supports samples; Modulus of shearing (G) then supports sample with the cross hang thing; Change material and also can be used for high temperature test.
The deficiencies in the prior art part: when measuring Young modulus (E) and modulus of shearing (G), use bar shaped or cross hang thing to support sample respectively, when two kinds of performances all will be measured, need the replacing stilt, complex operation, efficient are low.The next sample of hot conditions can only be selected wherein a kind of performance test at every turn, and performance test is not comprehensive and efficient is low.
Summary of the invention
The sample support method and the device that the purpose of this invention is to provide a kind of pulse excitation method elasticity modulus tester, be to overcome prior art must be changed bracing or strutting arrangement, complex operation when surveying two parameters with the piece sample deficiency, can be used for normal temperature or hot conditions simultaneously.
Purpose of the present invention can take following technical scheme to realize: the sample support method of described pulse excitation method elasticity modulus tester is that three strong points are set below sample, the position of three strong points is: the side in distance specimen length direction is provided with the A strong point, at distance specimen length direction opposite side two strong points of B, C is set.
The described A strong point is arranged on specimen length center line and short-term intersection point place, right side; Two strong points of B, C are symmetricly set on specimen length center line and short-term intersection point both sides, left side, and the right side short-term is parallel with the left side short-term and vertical with the specimen length center line, and distance is at least 1/3 of specimen width between two strong points of B, C.
The described A strong point is 0.224 times of specimen length apart from the air line distance of sample right-hand end; The short-term at B, two strong point places of C and the intersection point of specimen length center line are 0.224 times of specimen length to the air line distance of left end.
The described sample support device that is used for pulse excitation method elasticity modulus tester comprises three support columns, three support column settings at grade, wherein a side is one, and is corresponding with the A strong point; Opposite side has two support columns, and B, the C strong point with the sample bottom is corresponding respectively; The top of described support column is spherical, and the bottom is smooth, and three support column tops are corresponding with the strong point of sample bottom.The material of support column is a hard material, can be wimet, also can be refractory ceramics.
The described sample support device that is used for pulse excitation method elasticity modulus tester comprises two stay pipes, base, two stay pipes are separately positioned on the both sides of base, on a side stay pipe around a wire, tinsel is corresponding with the A strong point on the one side stay pipe, around two wire, two wire on the stay pipe and the B of sample, the C strong point are corresponding on the opposite side stay pipe.
With the A strong point and B, the C strong point is set to and the distance of sample end is 0.224 times position of specimen length, be because this position is the node location of sample, can make sample be subjected to be in the free vibration state fully behind the exciting, thereby obtain the true natural frequency of material.Young modulus (E), modulus of shearing (G) numerical value of the method for supporting test sample of mentioning in this method for supporting and the standard are in full accord.
The present invention can satisfy Young modulus (E) and modulus of shearing (G) test simultaneously.Bracing or strutting arrangement be needn't change in the process of the test, Young modulus (E) and modulus of shearing (G) with a kind of supporting way the time, successively recorded, easy and simple to handle, avoided troublesome operation, significantly improved detection efficiency.Change material, this supporting way also can satisfy the high temperature service condition, and is simple to operate, and performance test is comprehensive, efficient is high.
Description of drawings
Accompanying drawing 1 is the embodiment 1 of sample support device and the structural representation of sample relative position.
Accompanying drawing 2 is the embodiment 2 of sample support device and the structural representation of sample relative position.
Among the figure, 1, sample, 2, the A strong point, 21, A support column, 31, the B strong point, 32, the C strong point, 33, B support column, 34, the C support column, 4, right side sample short-term, 5, left side sample short-term, 6, specimen length center line, 71,72, tinsel, 81, right stay pipe, 82, left stay pipe, 9, base.
Embodiment
In conjunction with the accompanying drawings, specific embodiments of the invention are described.
The sample support method of pulse excitation method elasticity modulus tester of the present invention is that three strong points are set below sample 1, and the position of three strong points is: the end in distance specimen length direction one side is provided with the A strong point 2; End at the opposite side of distance specimen length direction is provided with B, the C strong point 31 and 32.The described A strong point is 0.224 times of specimen length to the distance of sample one side end; Two strong points of B, C are symmetricly set on specimen length center line 6 and left side sample short-term 5 intersection point both sides, and the intersection point of described specimen length center line 6 and left side sample short-term 5 is 0.224 times of specimen length apart from the distance of sample end side.Distance between while B, the C strong point is at least 1/3 of specimen width; The A strong point 2 is arranged on sample specimen length center line 6 and right side sample short-term 4 intersection point places, and two sample short-terms are parallel to each other and perpendicular to length center line 6.
Embodiment 1:
Embodiment 2:
Accompanying drawing 2 is the embodiment 2 of sample support device and the structural representation of sample relative position.
Described bracing or strutting arrangement is by two stay pipes 81,82, base 9 about comprising, right stay pipe 81,82 two stay pipes of left stay pipe are separately positioned on the both sides of base 9, on right stay pipe around a wire 71, on left stay pipe 82 around two wire 72, two wire 72 on the stay pipe 82 of a left side are corresponding with B, the C strong point of sample, and tinsel is corresponding with the A strong point on the right stay pipe.Distance between left side two tinsels and the sample bottom contact point is 2/3 of left side sample short-term 5 length.
Claims (4)
1. the sample support method of a pulse excitation method elasticity modulus tester, it is characterized in that: it is that three strong points are set below sample, and strong point bottom is provided with bracing or strutting arrangement, bracing or strutting arrangement contacts for point with the strong point; The position of three strong points is: in distance specimen length direction one side the A strong point is set, at distance specimen length direction opposite side two strong points of B, C is set, strong point A and B, the C strong point can exchange in the both sides of specimen length direction; The described A strong point is arranged on the intersection point place of specimen length center line (6) and sample right side sample short-term (4); Two strong points of B, C are symmetricly set on the intersection point both sides of specimen length center line (6) and left side sample short-term (5), right side sample short-term (4) is parallel to each other with left side sample short-term (5) and perpendicular to length center line (6), the distance between B, two strong points of C is at least 1/3 of specimen width; The described A strong point is 0.224 times of specimen length apart from the vertical range of sample right-hand end; The intersection point of BC short-term and length center line (6) is 0.224 times of specimen length to the vertical range of sample left end.
2. bracing or strutting arrangement that is used for the sample support method of pulse excitation method elasticity modulus tester as claimed in claim 1, it is characterized in that: described bracing or strutting arrangement has three support columns, three support column settings at grade, wherein a side is an A support column (21), and is corresponding with the A strong point; Opposite side has B support column (33) and (34) two support columns of C support column, and B, the C strong point with the sample bottom is corresponding respectively; The top of described support column is spherical, and the bottom is smooth, and three support column tops are corresponding with the strong point of sample bottom.
3. bracing or strutting arrangement according to claim 2 is characterized in that: the material of support column is wimet or refractory ceramics.
4. bracing or strutting arrangement that is used for the sample support method of pulse excitation method elasticity modulus tester as claimed in claim 1, it is characterized in that: described bracing or strutting arrangement comprises left stay pipe (82), right stay pipe (81), tinsel, base (9), two stay pipes are separately positioned on the two ends of base (9), go up around a wire (71) at right stay pipe (81), go up parallel ring around two wire (72) at left stay pipe (82), it is corresponding with the A strong point (2) that right stay pipe (81) is gone up tinsel (71), two wire (72) on the left stay pipe (82) and the B of sample, C strong point correspondence.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100662307A CN101696958B (en) | 2009-10-23 | 2009-10-23 | Method and device for supporting sample of pulse excitation method elasticity modulus tester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100662307A CN101696958B (en) | 2009-10-23 | 2009-10-23 | Method and device for supporting sample of pulse excitation method elasticity modulus tester |
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| CN101696958A CN101696958A (en) | 2010-04-21 |
| CN101696958B true CN101696958B (en) | 2011-09-21 |
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| CN106769560B (en) * | 2017-01-09 | 2019-05-03 | 温州大学 | A kind of I-beam mechanics parameter lossless detection method based on vibration |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2078875U (en) * | 1990-07-31 | 1991-06-12 | 胡学宁 | Nondestructive detector of strength of sintered brick |
| US5284058A (en) * | 1992-01-08 | 1994-02-08 | The United States Of America As Represented By The Secretary Of The Air Force | Dual beam complex modulus apparatus |
| CN101368896A (en) * | 2007-08-18 | 2009-02-18 | 中国船舶重工集团公司第七二五研究所 | Method and apparatus for simultaneously extracting material complex Young's modulus and complex shearing modulus |
-
2009
- 2009-10-23 CN CN2009100662307A patent/CN101696958B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2078875U (en) * | 1990-07-31 | 1991-06-12 | 胡学宁 | Nondestructive detector of strength of sintered brick |
| US5284058A (en) * | 1992-01-08 | 1994-02-08 | The United States Of America As Represented By The Secretary Of The Air Force | Dual beam complex modulus apparatus |
| CN101368896A (en) * | 2007-08-18 | 2009-02-18 | 中国船舶重工集团公司第七二五研究所 | Method and apparatus for simultaneously extracting material complex Young's modulus and complex shearing modulus |
Non-Patent Citations (1)
| Title |
|---|
| 张厚江等.支撑形式对振动式锯材弹性模量测定影响的研究.《北京林业大学学报》.2009,第31卷(第03期), * |
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