Abstract

The processes of elastic and elastoplastic deformation in concentration zones are analyzed for the case of different levels of rated stresses and resistance with respect to plastic strains. Based on the calculated and experimental data, it is shown that, with a decrease in the strengthening index in the inelastic region, the inhomogeneity of the strain distribution exhibits an increase. At the same time, the strain concentration coefficients increase and the stress concentration coefficients decrease. Special cases are considered when the latter are less than unity. This is important for justifying the strength, service life, survivability, and safety of new objects of the technosphere made of special structural materials and operated under extreme thermomechanical loading conditions, including the conditions inherent in nuclear power plants in normal modes and emergency situations.

中文翻译：

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分析非弹性区域的应力和应变集中以强化和软化材料

摘要

针对不同水平的额定应力和塑性应变阻力的情况，分析了集中区的弹性和弹塑性变形过程。计算和实验数据表明，随着非弹性区强化指数的减小，应变分布的不均匀性增大。同时，应变集中系数增大，应力集中系数减小。当后者小于统一时，会考虑特殊情况。这对于验证由特殊结构材料制成并在极端热机械载荷条件下运行的技术领域新物体的强度、使用寿命、生存能力和安全性非常重要，包括核电站在正常模式和紧急情况下固有的条件。