Abstract

The relevance of this work is due to the need to create methods for determining the stress-strain state of acoustically anisotropic structural materials as part of technical objects operated in Arctic conditions. The specific features of using the phenomenon of acoustoelasticity for materials with different values of acoustoelastic coefficients, acoustic anisotropy, and coefficients of temperature dependence of acoustic parameters that appear in the design algorithms are analyzed. It has been established that the existing approaches to the consideration of the temperature effects in a number of crucial cases lead to noticeable errors in determining the mechanical stresses in the material of critical technical objects. In this case, consideration of the temperature corrections is necessary for both biaxial (plane) and uniaxial stress states. The presence of anisotropy in the thermoacoustic coefficients of transverse waves for materials with anisotropy has been shown experimentally. The adjusted design formulas for determining the uniaxial and biaxial stress state of an anisotropic material with the anisotropy of the thermoacoustic coefficients of shear waves taken into account are proposed.

中文翻译：

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在零度以下温度下测试技术对象各向异性材料的应力状态时使用声弹性现象的特定特征

摘要

这项工作的相关性是由于需要创建确定各向异性各向异性结构材料的应力-应变状态的方法，作为在北极条件下运行的技术对象的一部分。分析了在设计算法中出现的具有不同声弹性系数，声学各向异性和声学参数的温度依赖性系数的材料使用声弹性现象的具体特征。已经确定，在许多关键情况下考虑温度影响的现有方法在确定关键技术对象的材料中的机械应力时会导致明显的错误。在这种情况下，对于双轴（平面）和单轴应力状态，都必须考虑温度校正。实验证明了各向异性材料在横波热声系数中存在各向异性。提出了考虑剪切波热声系数各向异性的确定各向异性材料单轴和双轴应力状态的调整设计公式。