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针对Vickers压痕提出了一个独立的仪器化压入响应参数-Vickers压痕中边距与名义中边距之比d/dn,用于衡量Vickers压痕鼓凸/沉陷程度。基于量纲分析和有限元数值仿真,建立了Vickers压痕中边距与名义中边距之比d/dn、仪器化压入名义硬度Hn、仪器化压入比功We/Wt与金属材料弹塑性参数之间的无量纲函数关系式,以此为基础,建立了基于Vickers压痕的金属材料弹塑性参数仪器化压入识别方法。该方法仅利用单一Vickers压头仪器化压入金属材料所得载荷-位移曲线及Vickers压痕,即可确定金属材料的弹性模量E、应变硬化指数n、条件屈服强度σ0.2和强度极限σb。并且,通过实验验证了该方法的有效性。
A separate instrumented press-in response parameter, Vickers indentation to nominal mid margin ratio, d / dn, was proposed for Vickers indentation to measure Vickers indentation bulge / sinking. Based on the dimensional analysis and finite element numerical simulation, the ratio of indentation midpoint to Vickers indentation d / dn was established, the nominal hardness Hn was instrumented, the instrumentized pressure ratio We / Wt and metallic material bombs Plasticity parameters based on the relationship between the non-dimensional function, based on which, established based on the Vickers indentation of plastic deformation of metal materials into the instrument identification method. In this method, the elastic modulus E, the strain hardening index n, the conditional yield strength σ0.2 and the strength limit σb of the metallic material can be determined by using the load-displacement curve and the Vickers indentation obtained by instrumentation of a single Vickers indenter into the metallic material . Moreover, the effectiveness of this method is verified by experiments.