CN205749126U - Extensometer method measure apparatus of youngs modulus - Google Patents

Extensometer method measure apparatus of youngs modulus Download PDF

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Publication number
CN205749126U
CN205749126U CN201620666970.XU CN201620666970U CN205749126U CN 205749126 U CN205749126 U CN 205749126U CN 201620666970 U CN201620666970 U CN 201620666970U CN 205749126 U CN205749126 U CN 205749126U
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extensometer
bracket
metal wire
tension sensor
force
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孟祥明
于立伟
孟令泽
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Abstract

引伸计法杨氏模量测定仪属于教学实验仪器领域,包括支架、上夹头、下夹头、引伸计、拉力传感器和加力手轮;支架为目型结构;上夹头安装在支架的第一横梁上;下夹头安装在支架的第二横梁上;加力手轮安装在支架的第三横梁上;引伸计安装在支架的第一横梁和第二横梁间的被测金属丝上;拉力传感器安装在支架的第二横梁和第三横梁间的连接件上;被测金属丝的两端分别固定在上夹头和下夹头内;拉力传感器的上端与下夹头连接,下端与加力手轮连接;加力手轮对拉力传感器施向下的力,拉力传感器测量被测金属丝受力大小,引伸计测量被测金属丝的伸长量大小。该仪器采用门式框架式设计,省去了光杠杆和尺度望远镜,便于操作,技术水平先进,设计新颖。

The extensometer Young's modulus tester belongs to the field of teaching and experimental instruments, including a bracket, an upper chuck, a lower chuck, an extensometer, a tension sensor and a force handwheel; the bracket is a mesh structure; the upper chuck is installed on the On the first beam; the lower chuck is installed on the second beam of the bracket; the force hand wheel is installed on the third beam of the bracket; the extensometer is installed on the measured metal wire between the first beam and the second beam of the bracket The tension sensor is installed on the connector between the second beam and the third beam of the bracket; the two ends of the metal wire to be measured are respectively fixed in the upper chuck and the lower chuck; the upper end of the tension sensor is connected with the lower chuck, and the lower end It is connected with the booster handwheel; the booster handwheel exerts a downward force on the tension sensor, the tension sensor measures the force on the tested metal wire, and the extensometer measures the elongation of the tested metal wire. The instrument adopts a portal frame design, eliminating the need for optical levers and scale telescopes, which is easy to operate, advanced in technology, and novel in design.

Description

引伸计法杨氏模量测定仪Extensometer method Young's modulus tester

技术领域technical field

本实用新型属于教学实验仪器领域,具体涉及一种引伸计法杨氏模量测定仪。The utility model belongs to the field of teaching experiment instruments, in particular to an extensometer method Young's modulus measuring instrument.

背景技术Background technique

杨氏模量,它是沿纵向的弹性模量,也是材料力学中的名词。根据胡克定律,在物体的弹性限度内,应力与应变成正比,比值被称为材料的杨氏模量,它是表征材料性质的一个物理量,仅取决于材料本身的物理性质。杨氏模量的大小标志了材料的刚性,杨氏模量越大,越不容易发生形变。Young's modulus, which is the modulus of elasticity in the longitudinal direction, is also a term in mechanics of materials. According to Hooke's law, within the elastic limit of the object, the stress and strain become proportional, and the ratio is called the Young's modulus of the material, which is a physical quantity that characterizes the properties of the material and only depends on the physical properties of the material itself. The size of Young's modulus marks the rigidity of the material, and the larger the Young's modulus, the less likely it is to deform.

现有的杨氏模量检测大多采取静态法,静态法是指在试样上施加一恒定的弯曲应力,测定其弹性弯曲挠度,或是在试样上施加一恒定的拉伸(或压缩)应力,测定其弹性变形量;或根据应力和应变计算弹性模量。静态法中大多采用光杠杆和望远镜测量杨氏模量,缺点是试样用量大,仪器体积大,准确度低,不能重复测定。Most of the existing Young's modulus tests adopt the static method. The static method refers to applying a constant bending stress on the sample to measure its elastic bending deflection, or applying a constant stretch (or compression) to the sample. Stress, measure its elastic deformation; or calculate elastic modulus according to stress and strain. Most of the static methods use optical levers and telescopes to measure Young's modulus. The disadvantages are that the amount of samples is large, the volume of the instrument is large, the accuracy is low, and repeated measurements cannot be made.

实用新型内容Utility model content

为了解决现有技术中存在的问题,本实用新型提供了一种引伸计法杨氏模量测定仪,该测定仪克服了现有技术中,必须使用光杠杆和望远镜的复杂设备,准确度低等缺点。In order to solve the problems existing in the prior art, the utility model provides an extensometer method Young's modulus measuring instrument, which overcomes the complex equipment in the prior art that must use optical levers and telescopes, and has low accuracy and other shortcomings.

本实用新型解决技术问题所采用的技术方案如下:The technical solution adopted by the utility model to solve technical problems is as follows:

引伸计法杨氏模量测定仪,该测定仪包括支架、上夹头、下夹头、引伸计、拉力传感器和施力装置;所述支架为目型结构;上夹头安装在所述支架的第一横梁上;下夹头安装在所述支架的第二横梁上;施力装置安装在所述支架的第三横梁上;被测金属丝的两端分别固定在上夹头和下夹头内;引伸计安装在被测金属丝上;拉力传感器的上端与下夹头连接,下端与施力装置连接;施力装置对拉力传感器施向下的力,拉力传感器测量被测金属丝受力大小,引伸计测量被测金属丝的伸长量大小。Extensometer method Young's modulus tester, the tester includes a bracket, an upper chuck, a lower chuck, an extensometer, a tension sensor and a force applying device; the bracket is a mesh structure; the upper chuck is installed on the bracket On the first beam of the bracket; the lower clamp is installed on the second beam of the bracket; the force device is installed on the third beam of the bracket; the two ends of the measured metal wire are respectively fixed on the upper clamp and the lower clamp inside the head; the extensometer is installed on the metal wire to be tested; the upper end of the tension sensor is connected to the lower chuck, and the lower end is connected to the force applying device; The magnitude of the force, the extensometer measures the elongation of the measured wire.

本实用新型的有益效果是:该仪器主体结构采用门式框架式设计,省去 了传统的光杠杆和尺度望远镜两大部件,便于操作,技术水平先进,设计新颖,国内领先。The beneficial effects of the utility model are: the main structure of the instrument adopts a portal frame design, which saves the traditional optical lever and scale telescope, which is easy to operate, advanced in technology, novel in design, and leading in the country.

附图说明Description of drawings

图1本实用新型引伸计法杨氏模量测定仪主视图。Fig. 1 is the front view of the extensometer method Young's modulus tester of the utility model.

图2本实用新型引伸计法杨氏模量测定仪主机和数显表示意图。Fig. 2 is a schematic diagram of the host computer and digital display table of the extensometer method Young's modulus measuring instrument of the utility model.

图中:1、上夹头,2、被测金属丝,3、支架,4、下夹头,5、第二横梁,6、加力手轮,7、可调底脚,8、底座平台,9、第三横梁,10、拉力传感器,11、第一横梁,12、引伸计13、数显表。In the figure: 1. Upper chuck, 2. Metal wire to be tested, 3. Bracket, 4. Lower chuck, 5. Second beam, 6. Afterburner handwheel, 7. Adjustable feet, 8. Base platform , 9, the third beam, 10, tension sensor, 11, the first beam, 12, extensometer 13, digital display table.

具体实施方式detailed description

下面结合附图和实施例对本实用新型做进一步详细说明。Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.

如图1和图2所示,引伸计法杨氏模量测定仪,该测定仪包括支架3、上夹头1、下夹头4、引伸计13、拉力传感器10和加力手轮6;所述支架3为目型结构;上夹头1安装在所述支架3的第一横梁11上;下夹头4安装在所述支架3的第二横梁5上;加力手轮6安装在所述支架3的第三横梁9上;被测金属丝2的两端分别固定在上夹头1和下夹头4内;引伸计13安装在所述支架3的第一横梁11和第二横梁5间的被测金属丝2上;拉力传感器10的上端与下夹头4连接,下端与加力手轮6连接;支架3的底座平台8上安装可调底脚7,调整杨氏模量测定仪是否在水平面上。旋转加力手轮6,沿螺栓旋转,螺栓向下运动,对拉力传感器10施加向下的力,被测金属丝2产生形变,此时,拉力传感器10测量被测金属丝2的受力大小,引伸计13测量被测金属丝2的伸长量大小。拉力传感器10和引伸计13将测量数据通过数据线传输至数显表上,数显表通过杨氏模量的计算公式E=F L/SΔL计算得到被测金属丝2的杨氏模量;其中F为被测金属丝2的拉力值,L为被测金属丝2的引伸计标距值,S被测金属丝2的横截面积值,ΔL为被测金属丝2的引伸计的变形值。As shown in Fig. 1 and Fig. 2, extensometer method Young's modulus measuring instrument, this measuring instrument comprises support 3, upper chuck 1, lower chuck 4, extensometer 13, tension sensor 10 and booster handwheel 6; The bracket 3 is a mesh structure; the upper chuck 1 is installed on the first beam 11 of the bracket 3; the lower chuck 4 is installed on the second beam 5 of the bracket 3; On the third crossbeam 9 of the support 3; the two ends of the measured wire 2 are respectively fixed in the upper clamp 1 and the lower clamp 4; the extensometer 13 is installed on the first crossbeam 11 and the second On the measured metal wire 2 between the beams 5; the upper end of the tension sensor 10 is connected with the lower chuck 4, and the lower end is connected with the afterburner hand wheel 6; the adjustable foot 7 is installed on the base platform 8 of the bracket 3, and the Young's mold is adjusted Whether the measuring instrument is on a horizontal plane. Rotate the booster hand wheel 6, rotate along the bolt, and the bolt moves downward, applying a downward force to the tension sensor 10, and the measured metal wire 2 is deformed. At this time, the tension sensor 10 measures the force of the measured metal wire 2 , the extensometer 13 measures the elongation of the measured metal wire 2 . The tension sensor 10 and the extensometer 13 transmit the measurement data to the digital display table through the data line, and the digital display table calculates the Young's modulus of the measured metal wire 2 through the calculation formula E=F L/SΔL of the Young's modulus; wherein F is the tension value of the tested metal wire 2, L is the gauge length value of the extensometer of the tested metal wire 2, S is the cross-sectional area value of the tested metal wire 2, and ΔL is the deformation value of the extensometer of the tested metal wire 2 .

本实用新型的主要技术参数:Main technical parameters of the utility model:

1、最大拉力(N): 301. Maximum pulling force (N): 30

2、拉力显示分辨值(N): 0.0012. Rally display resolution value (N): 0.001

3、引伸计标距(mm): 1003. Extensometer gauge length (mm): 100

引伸计量程(mm): 5Extensometer range (mm): 5

4、引伸计变形显示分辨值(mm): 0.0014. Extensometer deformation display resolution value (mm): 0.001

5、钢丝(mm): L=400Φ=0.505. Steel wire (mm): L=400Φ=0.50

钢丝(mm): L=400Φ=0.80。Steel wire (mm): L=400Φ=0.80.

Claims (2)

1.引伸计法杨氏模量测定仪,其特征在于,该测定仪包括支架、上夹头、下夹头、引伸计、拉力传感器和施力装置;所述支架为目型结构;上夹头安装在所述支架的第一横梁上;下夹头安装在所述支架的第二横梁上;施力装置安装在所述支架的第三横梁上;被测金属丝的两端分别固定在上夹头和下夹头内;引伸计安装在被测金属丝上;拉力传感器的上端与下夹头连接,下端与施力装置连接;施力装置对拉力传感器施向下的力,拉力传感器测量被测金属丝受力大小,引伸计测量被测金属丝的伸长量大小。1. Extensometer method Young's modulus measuring instrument, it is characterized in that, this measuring instrument comprises support, upper chuck, lower chuck, extensometer, tension sensor and force-applying device; Described support is eye-shaped structure; Upper clamp The head is installed on the first beam of the bracket; the lower chuck is installed on the second beam of the bracket; the force applying device is installed on the third beam of the bracket; Inside the upper chuck and the lower chuck; the extensometer is installed on the metal wire to be tested; the upper end of the tension sensor is connected with the lower chuck, and the lower end is connected with the force applying device; the force applying device exerts downward force on the tension sensor, and the tension sensor Measure the force of the tested metal wire, and the extensometer measures the elongation of the tested metal wire. 2.根据权利要求1所述的引伸计法杨氏模量测定仪,其特征在于,该测定仪还包括数显表;所述引伸计和拉力传感器的输出信号传输到数显表上,数显表显示被测金属丝的变形值、拉力值、和拉力值与变形值的比值。2. extensometer method Young's modulus measuring instrument according to claim 1, is characterized in that, this measuring instrument also comprises digital display meter; The output signal of described extensometer and tensile sensor is transmitted on the digital display meter, and digital display meter The display shows the deformation value, tension value, and the ratio of tension value to deformation value of the measured metal wire.
CN201620666970.XU 2016-06-29 2016-06-29 Extensometer method measure apparatus of youngs modulus Expired - Fee Related CN205749126U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110487633A (en) * 2019-08-29 2019-11-22 中国石油大学(北京) Method and device for measuring elastic modulus
CN110530745A (en) * 2019-09-09 2019-12-03 南昌大学 The device and method of damage variable is measured in a kind of prediction of Metal Material Fatigue

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110487633A (en) * 2019-08-29 2019-11-22 中国石油大学(北京) Method and device for measuring elastic modulus
CN110487633B (en) * 2019-08-29 2022-08-26 中国石油大学(北京) Elastic modulus measuring method and device
CN110530745A (en) * 2019-09-09 2019-12-03 南昌大学 The device and method of damage variable is measured in a kind of prediction of Metal Material Fatigue

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