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Test control system and method used for viscous-elastic material bending fatigue test

A control system and bending fatigue technology, applied in the direction of using a stable bending force to test the strength of materials, analyze materials, strength characteristics, etc., can solve the problems affecting the authenticity and reliability of the test results, excessive creep deformation, etc. The effect of expanding the test material range and test temperature range, reducing creep deformation, improving the success rate and reliability

Active Publication Date: 2012-02-22
GUANGDONG GT TECH ROAD MATERIAL TECH CO LTD
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Problems solved by technology

However, when some soft asphalt materials are tested or the test temperature is high, it is easy to cause excessive creep deformation of the specimen at the clamping position and nearby areas, which will affect the authenticity and reliability of the test results

Method used

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  • Test control system and method used for viscous-elastic material bending fatigue test
  • Test control system and method used for viscous-elastic material bending fatigue test

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0026] like figure 1 As shown, the present invention discloses a test control system for bending fatigue tests of viscoelastic materials, including a test piece 11, a computer control system 1 and a clamping control device connected between the test piece 11 and the computer control system 1 and An adjusting device for adjusting the clamping force of the clamping control device on the test piece, the adjusting device is connected between the clamping control device and the computer control system 1 .

[0027] In this embodiment, the clamping control device includes a stepper motor 3, a lifting screw 4, a test piece chuck 5, a displacement sensor 6, a displacement sensor bracket 7, a force transmission frame 8, a force sensor 9, and a power system 10; The device is a stepper motor adjustment module 2 provided with an adjustment switch 12; the lifting...

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Abstract

The invention relates to a test control system and method used for a viscous-elastic material bending fatigue test. The test control system comprises a testing member (11), a computer control system (1), a clamping control device and an adjusting device, wherein the clamping control device is connected between the testing member (11) and the computer control system (1); and the adjusting device is used for adjusting the clamping force magnitude of the clamping control device on the testing member and connected between the clamping control device and the computer control system. In the invention, a bending stiffness modulus value of a viscous-elastic material measured in real time is obtained through the data collection function of a computer system, converted into an electric signal according to proportions, the adjusting device is controlled by the electric signal to adjust the current magnitude of the clamping control device and further adjust the clamping force of the clamping control device. The test result is true and reliable.

Description

technical field [0001] The invention relates to a test control system and control method for viscoelastic material bending fatigue test. Background technique [0002] When performing bending fatigue tests on viscoelastic materials, it is usually necessary to use special test fixtures to clamp beam-type specimens. However, due to the viscoelastic (or viscoelastic-plastic) characteristics of the test material itself during the fatigue test, the beam specimen will produce a certain cumulative creep deformation at the clamping position and the surrounding area. If the creep deformation of the specimen is too large, it will be inconsistent with the assumed mechanical calculation model, which will affect the accuracy of the test results and even produce wrong test results. Therefore, during the bending fatigue test of viscoelastic materials, how to control the clamping force of the fixture to reduce the creep deformation of the specimen is very critical. [0003] Taking the four...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01N3/20
Inventor 虞将苗张肖宁
Owner GUANGDONG GT TECH ROAD MATERIAL TECH CO LTD
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