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一、引言称重传感器的弹性体,实际上是在交变载荷下工作的,弹性体的失效是在重复加载过程中造成的残留变形致使测量精度丧失的结果。近年来,发展起来的损伤力学理论,为解决材料的早期失效和寿命预测开辟了新的途径。研究认为,材料损伤发展是一种不可逆的耗能过程。根据热力学观点,损伤变量表示材料内部组织结构的不可逆变化过程,体现材料性质在外部条件作用下发生局部缓慢
I. INTRODUCTION The elastic body of load cell actually works under alternating load. The failure of elastic body is the result of residual deformation caused by repeated deformation caused by the loss of measuring accuracy. In recent years, the developed theory of damage mechanics opens up new avenues for solving the early failure and life prediction of materials. Research suggests that the development of material damage is an irreversible energy consumption process. According to the thermodynamic view, the damage variable represents the irreversible change process of the internal structure of the material, which shows that the material properties are locally slow under the external conditions