A Procedure for the Numerical Determination of the Strength Criterion Parameters of a Three-Dimensionally Reinforced Composite Material

IF 0.7 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Strength of Materials Pub Date : 2024-05-04 DOI:10.1007/s11223-024-00626-8

A. V. Morozov, G. I. Lvov

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Abstract

A numerical procedure for determining the parameters of the quadratic strength criterion for composite materials is presented, which considers the difference in tensile and compressive ultimate stresses. In addition to the reinforcement geometry, the elastic properties and ultimate stresses of fibers and the matrix are used as input data. The developed approach is based on the finite element modeling of a representative element of the volume of a three-dimensionally reinforced composite material. The boundary conditions are formulated, which makes it possible to reproduce the stress state within this volume under different types of homogeneous (on average) loads of the composite material. The local maximum equivalent stresses were determined separately for fibers and the matrix, which were used to determine the calculated ultimate stresses of the composite. The numerical results for flat specimens under tension in two directions and shear in the specimen plane were experimentally verified. The maximum difference between the calculated and experimental values of ultimate stress is 6.13%, which makes it possible to use the proposed procedure in design works.

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数值确定三维增强复合材料强度标准参数的程序

本文介绍了确定复合材料二次强度准则参数的数值程序，该程序考虑了拉伸和压缩极限应力的差异。除了加固几何形状外，纤维和基体的弹性特性和极限应力也被用作输入数据。所开发的方法基于三维增强复合材料体积代表元素的有限元建模。边界条件的制定使得在复合材料不同类型的均匀（平均）载荷下再现该体积内的应力状态成为可能。分别确定了纤维和基体的局部最大等效应力，用于确定复合材料的计算极限应力。通过实验验证了平面试样在两个方向上的拉伸和试样平面上的剪切的数值结果。极限应力的计算值和实验值之间的最大差异为 6.13%，这使得在设计工作中使用所建议的程序成为可能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Strength of Materials MATERIALS SCIENCE, CHARACTERIZATION & TESTING-

CiteScore

1.20

自引率

14.30%

发文量

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.