SYSTEM AND METHOD FOR IN-SITU TESTING OF MECHANICAL PROPERTIES OF MATERIALS IN DYNAMIC AND STATIC LOAD SPECTRA

摘要

A system and method for in-situ testing of mechanical properties of materials in dynamic and static load spectra, relating to the field of mechanical testing. The system integrates a static testing function of biaxial tension and shear in an orthogonal plane, a biaxial tension-tension mode fatigue testing function, and a static and dynamic indentation testing function, and can establish complicated static and dynamic load spectra and perform multi-mode complex load mechanical property evaluation on a film material or a bulk material, for example, high-cycle fatigue tests based on biaxial pre-tension load and impact indentation tests based on biaxial tension-shear preload. In addition, by pre-fabricating feature defects in a central area and a cruciform arm area of a cruciform specimen (33), and by means of the analysis function of a variable magnification type optical imaging system or a digital speckle strain analysis system, researches on deformation behaviors and crack propagation laws of micro-defects in a component under multi-dimensional stress states can be implemented, and an evaluation tool can be provided for performance degradation laws of products and optimized preparation methods of materials.