Material mechanical property in-situ testing system and method in dynamic and static load spectrum

Abstract

The invention relates to a material mechanical property in-situ testing system and method in a dynamic and static load spectrum, and belongs to the field of mechanical tests. The system integrates the following functions: a static testing function of biaxial drawing and shearing in an orthogonal plane, a shearing static testing function, a double shaft pull-pull mode fatigue testing function, and a static / dynamic press testing function. A complicated static / dynamic load spectrum can be established. Multi-mode composite load mechanical property evaluation can be performed on a film material or a block material, for example: high-cycle fatigue tests based on double-shaft pre-stretching load and impact press tests based on double-shaft stretching-shearing pre-load. At the same time, special defects are pre-fabricated on the central area and cross shaped arm area of a test piece; the analysis functions of a variable-zoom optical imaging system or a digital speckle strain analysis system can be utilized; the provided system and method can also be used to research the deformation behavior and cracking expansion rules of micro defects in a component under a multi-dimensional stress, and an evaluation tool is provided for performance degradation rules of products and optimized preparation method of materials.

Description

technical field [0001] The invention relates to the field of mechanical testing, in particular to an in-situ testing system and method for mechanical properties of materials under a static and dynamic load spectrum, especially a material microcosmic in-situ mechanical testing system integrating various static and dynamic testing functions. The system has rich test modes such as biaxial tension, biaxial fatigue, biaxial tension-shear, impact compression, etc., and through the integration with optical imaging system or digital speckle strain analysis system, The fatigue failure mechanism and performance weakening law of materials are studied to provide testing tools for optimizing the material preparation process and improving the service reliability of the structure. Background technique [0002] The stress form and physical field environment of materials and their products under service conditions are complex and changeable, and they are often subjected to static and dynamic...

AI Technical Summary

Problems solved by technology

Most of the above research work uses vector synthesis and decomposition methods to decouple the tension-shear composite stress state, and rarely mentions the fatigue and indentation test technology based on the complex plane stress state

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