Three-point bending test device and test method for high-speed tensile test machine

A high-speed stretching and three-point bending technology, which is applied in the direction of applying stable bending force to test the strength of materials, measuring devices, instruments, etc., can solve the problems of large changes in loading rate, no material high-speed three-point bending test standards and specifications, Unable to achieve medium and high-speed loading and other problems, to achieve the effect of low manufacturing cost, simple structure and simple operation

Active Publication Date: 2015-03-11
AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, when the three-point bending test device of the prior art is used on an electronic universal testing machine, it can realize a low-speed (<500mm / min) three-point bending test, but it cannot realize medium and high-speed loading; when it is used for a drop weight impact testing machine, although High-speed three-point bending loading can be realized, but because the drop hammer loads the specimen by free fall, there is energy loss during the impact process, resulting in a large change in the loading rate
At present, there are no testing standards and specifications for high-speed three-point bending of materials in the industry

Method used

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  • Three-point bending test device and test method for high-speed tensile test machine

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with accompanying drawing of description:

[0032] as attached Figure 1~8 As shown, a three-point bending test device for a high-speed tensile testing machine includes a base 1, two fixing seats fixedly arranged on the base 1 for placing a test piece 5 and for generating a load on the test piece 5 The loading head 4 of the force, the two fixing seats are symmetrically arranged on the opposite sides of the loading head 4, two through holes are respectively opened on the two fixing seats, the through hole 6 is opened on the loading head 4, and the test piece 5 passes through the through hole. The two ends of the hole 6 and the test piece 5 are respectively fixed in the through hole.

[0033] Each fixed seat includes a support seat 2 fixedly arranged on the base 1 and a card seat 3 fixedly connected to the support seat 2 at the upper end of the support seat 2, and the side of the card seat 3 facing the ...

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Abstract

The invention relates to a three-point bending test device for a high-speed tensile test machine. The device comprises a base, two fixing seats which are fixedly arranged on the base and used for placement of test pieces, and a loading head for generating loading force to the test pieces, wherein the two fixing seats are symmetrically arranged on the two opposite sides of the loading head. The device is characterized in that two through holes are formed in each of the two fixing seats, a through hole is formed in the loading head, the test pieces penetrate through the through holes, and two ends of each test piece are respectively fixed in the through holes. The three-point bending test device disclosed by the invention can realize the dynamic three-point bending loading through the high-speed tensile test machine directly, and the operation is simple.

Description

technical field [0001] The invention belongs to the field of dynamic testing and characterization of mechanical properties of materials, is used in industries such as automobiles and aviation, and relates to a three-point bending test device and a test method for a high-speed tensile testing machine. Background technique [0002] The three-point bending test is one of the basic methods for testing the mechanical properties of materials. It is mainly used to determine the flexural strength of brittle and low-plastic materials, and it can also measure the surface quality of materials. The dynamic three-point bending test is a test method for dynamic loading of the tested material specimen. This method is used to obtain data such as force and displacement of the material under different rate loads, which is used to verify the reliability of the material model. Due to the immaturity of relevant test methods, the industry urgently lacks high-speed three-point bending test data fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/20G01N3/02
Inventor 赖兴华黄毅王磊夏勇周青
Owner AUTOMOBILE RES INST OF TSINGHUA UNIV IN SUZHOU XIANGCHENG
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