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Device and method for measuring micro yield strength of composite material rod

A composite material and yield strength technology is applied in the field of composite material rod micro-yield strength measurement devices, which can solve the problems such as the influence of environmental temperature fluctuations on measurement results, and achieve the effects of small error, high precision and high measurement accuracy.

Inactive Publication Date: 2020-06-02
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The object of the present invention is to aim at the above defects of the prior art, to provide a device and method for measuring the micro-yield strength of composite material rods, to solve the technical problems in the prior art that the bonding process and ambient temperature fluctuations have an impact on the measurement results, and to improve the Accuracy of micro-yield strength measurement for composite rods

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  • Device and method for measuring micro yield strength of composite material rod

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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] In order to make the description of the present disclosure more detailed and complete, the following provides an illustrative description of the implementation modes and specific examples of the present invention; but this is not the only form for implementing or using the specific embodiments of the present invention. The description covers features of various embodiments as well as method steps and their sequences for constructing and operating those embodiments. However, other embodiments can also be used to achieve the same or equivalent functions and step sequences.

[0041] j...

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Abstract

The invention provides a device for measuring the micro yield strength of a composite material rod. The device relates to the technical field of material performance testing, adopts a displacement sensor to perform non-contact length measurement, is free of abrasion, avoids influence of manual operation in a contact type length measuring process due to the fact that a probe does not apply a mechanical external force to a tested sample, is superior to 0.1 micrometer in length measuring precision, reaches dozens of nanometer magnitude, and is high in measuring precision. The device adopts a temperature control assembly to provide a stable thermal environment for the whole test system, reduces thermal expansion deformation of the sample due to environmental temperature fluctuation to the minimum, and reduces measurement errors to the minimum. The invention further provides a method for measuring micro yield strength of the composite material rod, and the method adopts the testing device for measurement. The device and the method for measuring the micro-yield strength of the composite material rod solve the technical problem that the bonding process and the environmental temperature fluctuation influence the measurement result in the prior art, and improve the measurement precision of the micro-yield strength of the composite material rod.

Description

technical field [0001] The invention relates to the technical field of material performance testing, in particular to a device and method for measuring the micro-yield strength of a composite material rod. Background technique [0002] The micro-yield strength is usually produced after unloading the specimen with 10 -4 ~10 -7 It is expressed by the stress value at the time of residual deformation, or by the stress value when the linear relationship between stress and strain deviates (under the same residual deformation tolerance). When the applied stress exceeds the true elastic limit of the material, this micro-plastic deformation can be detected, and the plastic deformation behavior under this micro-stress is called micro-yielding. 10 -7 to 10 -4 The degree of permanent deformation has a key influence on the performance of many composite parts, such as precision instrument parts and optical parts, and it can reflect the nature of the material's microplastic deformation...

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Application Information

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IPC IPC(8): G01N3/18G01N3/02
CPCG01N3/02G01N3/18G01N2203/0003G01N2203/0017G01N2203/0075G01N2203/0226G01N2203/0617G01N2203/0676G01N2203/0682
Inventor 孙宝龙薛闯董吉洪
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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