Phenomenological Model of Scattered Fracture for Anisotropic Materials

IF 0.7 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Strength of Materials Pub Date : 2023-12-06 DOI:10.1007/s11223-023-00585-6
M. I. Bobyr, O. A. Bondarets
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Abstract

Calculation methods for assessing the strength and durability of critical structural elements for various purposes generally assume the isotropy hypothesis of structural materials. At the same time, their technological and operational anisotropy significantly affects the bearing capacity of the entire product. Introducing damageability parameters into the system of governing equations makes it possible to increase the reliability of stress-strain state calculations and assess the durability of structural bearing elements. The use of anisotropic structural materials requires specification of the damageability tensor. The laws governing the influence of anisotropy of mechanical characteristics of metal materials on the kinetics of damage accumulation (scattered fractures) have been established. The results of experimental studies and kinetic damageability diagrams for anisotropic metallic structural materials are presented. A generalized damage accumulation model with consideration of anisotropy parameters has been developed. It allows determining the components of the damageability tensor based on the results of a single basic experiment to measure the degradation of the elastic modulus of a material. The dependence of the limit values of scattered fracture on anisotropy coefficients is shown.

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各向异性材料的散裂现象学模型
用于评估各种用途的关键结构件的强度和耐久性的计算方法通常假定结构材料是各向同性的。与此同时,其技术和运行各向异性会对整个产品的承载能力产生重大影响。将可破坏性参数引入控制方程系统可以提高应力-应变状态计算的可靠性,并评估结构支承元件的耐久性。使用各向异性结构材料需要指定破坏性张量。金属材料机械特性的各向异性对损伤积累(分散断裂)动力学的影响规律已经建立。本文介绍了各向异性金属结构材料的实验研究结果和动力学损伤性图表。开发了一个考虑各向异性参数的广义损伤累积模型。该模型可以根据测量材料弹性模量退化的单一基本实验结果确定损伤性张量的组成部分。分散断裂的极限值与各向异性系数的关系也得到了证明。
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来源期刊
Strength of Materials
Strength of Materials MATERIALS SCIENCE, CHARACTERIZATION & TESTING-
CiteScore
1.20
自引率
14.30%
发文量
89
审稿时长
6-12 weeks
期刊介绍: Strength of Materials focuses on the strength of materials and structural components subjected to different types of force and thermal loadings, the limiting strength criteria of structures, and the theory of strength of structures. Consideration is given to actual operating conditions, problems of crack resistance and theories of failure, the theory of oscillations of real mechanical systems, and calculations of the stress-strain state of structural components.
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