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一、引言损伤力学是从五十年代末发展起来的一门学科。蠕变损伤是损伤力学的一个分支。其主要任务是解决在长时高温下运行的构件寿命计算中的各种非线性累积效应。国内外科学工作者对此进行了大量的研究和探索工作。本文的目的在于介绍蠕变损伤力学及蠕变损伤曲线的测定方法。二、蠕变损伤的力学理论蠕变损伤是晶格中微孔和微裂纹形成和发展而成为宏观裂纹。从力学观点,不管微裂纹和微孔增长的形式,蠕变损伤被看作是影响材料强度的状态变量。材料强度是指有效应力意义下的变形和破坏强度。
I. INTRODUCTION Damage mechanics is a discipline developed from the late 1950s. Creep damage is a branch of damage mechanics. Its main task is to solve various non-linear cumulative effects in the life calculation of components operating at long-term high temperatures. Domestic and foreign scientists carried out a lot of research and exploration. The purpose of this article is to introduce the method of determining creep damage mechanics and creep damage curves. Second, creep damage mechanics Theoretical creep damage is the formation of micro-cracks and microcracks in the lattice and the development of a macro-crack. From a mechanistic point of view, creep damage is considered as a state variable that affects the strength of a material regardless of the form of microcracks and microporosity. Material strength refers to the deformation and failure strength in the sense of effective stress.