Optimization design for hole geometries and fiber steering of composite laminates with a hole

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2024-09-24 DOI:10.1016/j.compstruct.2024.118611

Masataka Mizumoto , Kenji Asakawa , Yoshiyasu Hirano , Toshio Ogasawara

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引用次数: 0

Abstract

The objective of this study is to use numerical simulation for investigating the effects of hole geometry and fiber steering on the strength of a carbon fiber reinforced plastic (CFRP) laminate with a hole. For the 0° layers of CFRP laminates, the fibers were aligned to the maximum principal stress direction under uniaxial tensile loading to simulate a curved (steered) fiber orientation. Using Bézier curves, 600 CFRP panel models with different hole geometries were generated. Then they were subjected to progressive failure analysis and buckling eigenvalue analysis under tensile and shear loading, respectively, for the quasi-isotropic (QI) and fiber-steered models. A genetic algorithm (GA) was used to perform a multi-objective optimization design with tensile strength and shear buckling load as objective functions. Results show that the curvilinear orientation of the fibers near the stress concentrations was effective for strength enhancement. For example, for a panel with a rhombic hole shape with no curvature at the hole edge, the strength enhancement effect of fiber steering tends to be considerable under both tensile and shear loading. Results show that a multi-objective optimal design can search for a hole shape that has 0.132–1.41 % higher strength than an elliptical hole under both tensile and shear loading.

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带孔复合材料层压板的孔几何形状和纤维转向优化设计

本研究的目的是利用数值模拟研究孔的几何形状和纤维转向对带孔碳纤维增强塑料（CFRP）层压板强度的影响。对于 0° 层的碳纤维增强塑料层压板，在单轴拉伸载荷下，纤维与最大主应力方向对齐，以模拟弯曲（转向）纤维取向。利用贝塞尔曲线生成了 600 个具有不同孔几何形状的 CFRP 面板模型。然后对准各向同性（QI）模型和纤维转向模型分别进行拉伸和剪切载荷下的渐进失效分析和屈曲特征值分析。以拉伸强度和剪切屈曲载荷为目标函数，使用遗传算法（GA）进行了多目标优化设计。结果表明，纤维在应力集中点附近的曲线取向能有效提高强度。例如，对于孔边缘无曲率的菱形孔板，在拉伸和剪切载荷下，纤维转向的强度增强效果都很显著。结果表明，多目标优化设计可以找到在拉伸和剪切载荷下强度比椭圆孔高 0.132-1.41 % 的孔形。

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

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.