就混凝土自身而言，产生裂缝的机理一般认为是因为混凝土材料变形受约束所引起的内应力大于材料抗拉强度的缘故。
The mechanism of crack is that internal stress in concrete material caused by its restricted deformation is greater than tensile strength of material generally.
残余应力是普遍存在于材料中的一种内应力，如何测定其分布，一直是国内外很多学者关注的问题。
Residual stress is a internal stress that commonly exists in material, how to measure that is very concerned by many scientists.
早龄期时混凝土结构内应力的计算为优化混凝土材料的组成提供了依据，尽可能减少混凝土结构的开裂。
The optimization of mix composition of concrete according the calculation of inner stress at early age may reduce the cracking risk of concrete structure.
内应力的分布，对材料宏观力学性能如强度和断裂韧性，都将产生较大的影响。
The distribution of internal stress has large influence on mechanical properties of materials such ay strength and fracture toughness.
基于X射线应力测量原理，建立了一种双相材料相间内应力的测量与表征方法。
Based on the theory of X-ray stress measurement, a method of measurement and representation for the inter-phase stress of double-phase material was established.
采用CSR法对蠕变内应力的测试进行了研究，并在材料试验机上实现了CSR法的蠕变内应力测试。
The research was carried out on the basis of CSR to measure creep internal stress.
采用CSR法对蠕变内应力的测试进行了研究，并在材料试验机上实现了CSR法的蠕变内应力测试。
The research was carried out on the basis of CSR to measure creep internal stress.
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