CN202383021U - Device for measuring tension and compression elasticity modulus of material - Google Patents

Device for measuring tension and compression elasticity modulus of material Download PDF

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Publication number
CN202383021U
CN202383021U CN2011205727599U CN201120572759U CN202383021U CN 202383021 U CN202383021 U CN 202383021U CN 2011205727599 U CN2011205727599 U CN 2011205727599U CN 201120572759 U CN201120572759 U CN 201120572759U CN 202383021 U CN202383021 U CN 202383021U
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Prior art keywords
support
knife
edge
extend
extending
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Expired - Fee Related
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CN2011205727599U
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Chinese (zh)
Inventor
刘荣庆
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Nanchang Hangkong University
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Nanchang Hangkong University
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Abstract

The utility model discloses a device for measuring tension and compression elasticity modulus of a material. An upper extending support and a lower extending support are in positioning connection by a positioning rod; the upper end and the lower end of the positioning rod are connected with a limiting rod; the upper extending support and the lower extending support can vertically move on the limiting rod; the tail end of the lower extending support is fixedly connected to an inner shell of a resistance strain type sensor; the tail end of the upper extending support is connected to a spring steel sheet of the resistance strain type sensor; and signals of a strain sheet on the spring steel sheet are input to a digital display. The utility model has the advantages that the device overcomes the defect that the conventional common tension tester is not provided with the device for testing the tension and compression elasticity modulus of the material; and the device has the advantages of small size, simple structure, slippage prevention, high measurement precision and the like.

Description

A kind of device of measuring the materials in tension and compression elastic modulus
Technical field
The utility model relates to a kind of device of measuring elastic modulus, relates in particular to a kind of device of measuring the materials in tension and compression elastic modulus.
Background technology
At present; Common tension tester is when measuring tensile strength of material; Can only do the fail in tension experiment; And be equipped with to measure the device of materials in tension and compression elastic modulus E, can not in elastic range, adopt step by step Loading Method to measure the materials in tension and compression elastic modulus and load and deformation relationship curve are gathered in real time.
Summary of the invention
The purpose of the utility model has been to provide a kind of device of measuring the materials in tension and compression elastic modulus; This measurement mechanism overcomes existing tension tester and is not equipped with the defective of measuring materials in tension and compression elastic modulus device; Can not only measure the size of being out of shape between the two sections, but and display material tension and compression elastic modulus E value size.
The utility model is realized like this; It comprises the edge of a knife, down the edge of a knife, expanded material, on extend support, extend support, backstay, resistance strain type sensor, gag lever post, device for digit-displaying down; The support front end that it is characterized in that extending connects with Screw goes up the edge of a knife; Under the support front end of extending connect the edge of a knife down with Screw, the last edge of a knife is used the gauged distance section L that carefully draws spring to be fastened in the expanded material stage casing with the following edge of a knife 0On the position; On extend support and under extend and be located by connecting with backstay between the support, the backstay top and bottom connect gag lever post, on extend support with under the support of extending can move up and down at gag lever post; Under the support tail end of extending be fixedly connected on the resistance strain type sensor inner casing; On the extend tail end of support connect on the device spring steel plate of resistance-strain type sensing, the signal of foil gauge input device for digit-displaying on the spring steel plate, device for digit-displaying shows goes up (gauged distance L between the edge of a knife and the following edge of a knife 0) elongation Δ L and E value size after the loading.
Described resistance strain type sensor is made inductor with thin spring steel plate, and some sheet resistance foil gauges are pasted thin spring leaf upper and lower surfaces and form the full bridge measurement electric bridge.
The technique effect of the utility model is: this device has been filled up the defective that existing common tension tester is not equipped with test material tension and compression elastic modulus device; Can test the elastic modulus of 3 ~ 80 mm dia materials, the edge of a knife is fixed on expanded material gauged distance L with the following edge of a knife in the employing 0On the position, load automatically, utilize resistance strain type sensor to measure (gauged distance L in real time through machinery 0) elongation Δ L after the loading, show Δ L and the characteristics that calculate E value through device for digit-displaying, only need to go up the edge of a knife and use with the following edge of a knife and carefully draw spring to be fixed on the gauged distance L in expanded material stage casing 0On the position, can be easily with the proving installation clamping with unload, it is little to have more volume, simple in structure non-slip, the measuring accuracy advantages of higher.
Description of drawings
Fig. 1 is the structural representation of the utility model.
In the drawings, 1. go up support 4. backstays 5. resistance strain type sensors 6. device for digit-displaying of extending on the edge of a knife 2. gag lever posts 3. 9. times edge of a knife 10. expanded materials of support 8. Screws of extending for 7. times.
Embodiment
As shown in Figure 1; On extend support (3) front end with the edge of a knife (1) in Screw (8) connection; Under support (7) front end of extending connect the edge of a knife (9) down with Screw (8), the last edge of a knife (1) and the following edge of a knife (9) usefulness carefully draw spring to be fixed on the gauged distance L in expanded material (10) stage casing 0On the position; On extend support (3) and under extend and locate with backstay (4) between the support (7); Backstay (4) top and bottom connect gag lever post (2); On extend support (3) and under the support (7) of extending can move up and down in gag lever post (2), support (7) tail end of extending down is connected on resistance strain type sensor (5) inner casing fixing, on the extend tail end of support (3) connect on resistance strain type sensor (5) spring steel plate; The signal of foil gauge input device for digit-displaying (6) is handled on the spring steel plate; During use, earlier test material is clamped in the last lower chuck of testing machine, again with carefully drawing spring to be fastened at the gauged distance L in expanded material (10) stage casing 0On the position; Pressing device for digit-displaying (6) zero clearing button, to make the value of resistance strain type sensor (5) be zero (Δ L is zero); The starting characteristics test machine loads automatically and makes expanded material (10) elongation, and the last edge of a knife (1) and the following edge of a knife (9) are opening, and resistance strain type sensor (5) numeral increases; When load is added to a certain numerical value; Loading stops resistance strain type sensor (5) numeral and stops numeration, and device for digit-displaying (6) retains the material deformation maximal value, and the maximal value of resistance strain type sensor this moment (5) is exactly gauged distance L 0Elongation Δ L after the loading presses device for digit-displaying (6) and calculates button, device for digit-displaying (6) display material tension and compression elastic modulus E value size.
The principle of work of the utility model is: go up the edge of a knife and the following edge of a knife respectively with carefully drawing spring to be fixed on the gauged distance L in expanded material stage casing 0On the position, gauged distance L 0Be 50mm, in elastic range, be divided into some grades to the maximum load of desiring to add, whenever add one-level and do
Figure 2011205727599100002DEST_PATH_IMAGE002
, just can obtain one
Figure 2011205727599100002DEST_PATH_IMAGE004
, get several
Figure 364697DEST_PATH_IMAGE004
Mean value E value more accurate.
Calculating materials in tension and compression elastic modulus formula is:
Figure 2011205727599100002DEST_PATH_IMAGE006
In the formula
Figure 2011205727599100002DEST_PATH_IMAGE008
Be that upward the edge of a knife is known with following edge of a knife gauged distance,,
Figure 896217DEST_PATH_IMAGE002
Be that the increment load that material adds in elastic range at every turn is known,
Figure 2011205727599100002DEST_PATH_IMAGE010
The cross-sectional area that is expanded material is known, Be to add at every turn
Figure 884213DEST_PATH_IMAGE002
The edge of a knife and the following edge of a knife are at (gauged distance L on the back 0) elongation Δ L after the loading, obtain relative elongation
Figure 137733DEST_PATH_IMAGE004
, the E value just can be calculated.
Expanded material receives
Figure 897879DEST_PATH_IMAGE002
After the load, the last edge of a knife produces relative displacement with the following edge of a knife, and this moment, the reading of device for digit-displaying was exactly the gauged distance L that resistance strain type sensor obtains 0Elongation Δ L after the loading will
Figure 102595DEST_PATH_IMAGE004
Substitution tension and compression elastic modulus formula E value just can be calculated.
Resistance strain type sensor is to make inductor with thin spring steel plate; Four sheet resistance foil gauges are pasted spring leaf up-down structure surface and form the full bridge measurement electric bridge, and behind the expanded material stress deformation, the last edge of a knife opens with the following edge of a knife; Stressed and the generation microdeformation of spring leaf; The resistance of the foil gauge on the resistance strain type sensor will produce corresponding increase, and electric bridge is just exported a signal that has amplified four times, this resistance variations is converted to the variation of voltage through A/D converter; After prime amplifier amplifies, be input to display circuit to the electric signal that is measured, number shows device display standard distance L 0Elongation Δ L size after the loading.

Claims (1)

1. device of measuring the materials in tension and compression elastic modulus; It comprises the edge of a knife, down the edge of a knife, on extend support, extend support, backstay, resistance strain type sensor, gag lever post, device for digit-displaying down; The support front end that it is characterized in that extending connects with Screw goes up the edge of a knife; Under the support front end of extending connect the edge of a knife down with Screw, the last edge of a knife is used the gauged distance section L that carefully draws spring to be fastened in the expanded material stage casing with the following edge of a knife 0On the position; On extend support and under extend and be located by connecting with backstay between the support; The backstay top and bottom connect gag lever post, on the support of extending can move up and down at gag lever post with the support of extending down, the support tail end of time extending is fixedly connected on the resistance strain type sensor inner casing; On the extend tail end of support connect on the device spring steel plate of resistance-strain type sensing the signal of foil gauge input device for digit-displaying on the spring steel plate.
CN2011205727599U 2011-12-31 2011-12-31 Device for measuring tension and compression elasticity modulus of material Expired - Fee Related CN202383021U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205727599U CN202383021U (en) 2011-12-31 2011-12-31 Device for measuring tension and compression elasticity modulus of material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205727599U CN202383021U (en) 2011-12-31 2011-12-31 Device for measuring tension and compression elasticity modulus of material

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CN202383021U true CN202383021U (en) 2012-08-15

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102866061A (en) * 2012-09-03 2013-01-09 中交第二公路勘察设计研究院有限公司 Method for measuring elastic modulus of lightweight aggregate
CN104748665A (en) * 2015-03-17 2015-07-01 西安交通大学 Sensor for measuring material strain under high temperature environment
CN105091729A (en) * 2015-05-19 2015-11-25 西安交通大学 Strain extensometer using invar steel extension rod
CN106017298A (en) * 2016-05-19 2016-10-12 航天材料及工艺研究所 Direct contact type stretching deformation measuring system and method in high-temperature oxygen-free environment
CN106168472A (en) * 2016-08-26 2016-11-30 中国科学院武汉岩土力学研究所 A kind of cuboid sample lateral displacement measurement apparatus
CN104344993B (en) * 2013-07-23 2017-02-22 国家电网公司 Method for testing and measuring member bearing capacity and material performance parameters

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102866061A (en) * 2012-09-03 2013-01-09 中交第二公路勘察设计研究院有限公司 Method for measuring elastic modulus of lightweight aggregate
CN102866061B (en) * 2012-09-03 2014-05-14 中交第二公路勘察设计研究院有限公司 Method for measuring elastic modulus of lightweight aggregate
CN104344993B (en) * 2013-07-23 2017-02-22 国家电网公司 Method for testing and measuring member bearing capacity and material performance parameters
CN104748665A (en) * 2015-03-17 2015-07-01 西安交通大学 Sensor for measuring material strain under high temperature environment
CN104748665B (en) * 2015-03-17 2017-10-20 西安交通大学 The sensor of material strain under a kind of measurement hot environment
CN105091729A (en) * 2015-05-19 2015-11-25 西安交通大学 Strain extensometer using invar steel extension rod
CN106017298A (en) * 2016-05-19 2016-10-12 航天材料及工艺研究所 Direct contact type stretching deformation measuring system and method in high-temperature oxygen-free environment
CN106017298B (en) * 2016-05-19 2019-05-24 航天材料及工艺研究所 Direct contact type stretcher strain measuring system and measurement method under high temperature anaerobic environment
CN106168472A (en) * 2016-08-26 2016-11-30 中国科学院武汉岩土力学研究所 A kind of cuboid sample lateral displacement measurement apparatus
CN106168472B (en) * 2016-08-26 2020-02-14 中国科学院武汉岩土力学研究所 Cuboid sample lateral displacement measuring device

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Granted publication date: 20120815

Termination date: 20121231