人脐静脉是动脉替代物的良好材料,本文通过分析戊二醛处理的脐静脉的 Z 轴和θ轴拉伸试验,提出了修正的指数型应变能函数。并采用非线性最小二乘法建立了脐静脉的非线性本构关系,为脐静脉的临床应用和实验研究从生物力学性质上提供理论...人脐静脉是动脉替代物的良好材料,本文通过分析戊二醛处理的脐静脉的 Z 轴和θ轴拉伸试验,提出了修正的指数型应变能函数。并采用非线性最小二乘法建立了脐静脉的非线性本构关系,为脐静脉的临床应用和实验研究从生物力学性质上提供理论依据和实用参数。展开更多
The modified equivalent inclusion theory by the authors and the internal variable theory are employed to investigate the evolution of the microcracks in whisker toughening ceramics and the influence of the microcracks...The modified equivalent inclusion theory by the authors and the internal variable theory are employed to investigate the evolution of the microcracks in whisker toughening ceramics and the influence of the microcracks on the mechanical properties of the material. The effect of residual thermostrain, whisker content and aspect ratio is considered. The modulus, initial nonlinear load, strength and nonlinear constitutive relation are calculated and some important conclusions are given.展开更多
文摘The modified equivalent inclusion theory by the authors and the internal variable theory are employed to investigate the evolution of the microcracks in whisker toughening ceramics and the influence of the microcracks on the mechanical properties of the material. The effect of residual thermostrain, whisker content and aspect ratio is considered. The modulus, initial nonlinear load, strength and nonlinear constitutive relation are calculated and some important conclusions are given.