Parametric design and modeling method of CFRP laminated components applicable for multi-material vehicle body development

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2024-01-19 DOI:10.1093/jcde/qwae007

Tiantong Lv, Zipeng Chen, Dengfeng Wang, Xuejing Du

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引用次数: 0

Abstract

Combined application of steel, aluminum and CFRP is the main direction of future lightweight body development. However, the anisotropy and additional lamination design variables of CFRP parts poses significant challenges for the development of multi-material bodies. This study establishes a parametric design method for the variable-thickness lamination scheme based on non-uniform rational B-splines (NURBS), it can be coupled with existing parametric design methods for structural shapes to formulate a complete parametric design and modelling of CFRP components. On this basis, a homogenized intermediate material property is derived from classic laminate theory by introducing lamination assumptions, it enables a stepwise multi-material body optimization method to solve the challenge that components’ material design variables switching between CFRP and alloy will introduce/eliminate lamination design variables iteratively, posing a great optimization convergence difficulty. The proposed parametric modeling method for CFRP components was validated by experimental tests of a fabricated roof beam, and the proposed optimization method was applied to a vehicle body, achieving 15.9%, 23.9%, 18.6%, 12.2% increase in bending and tortional stiffness and modal frequencies; 20.2%, 9.3%, 12.7% reduction of weight and peak acceleration in frontal and side collisions. This study enables the forward design of multi-material bodies compatible with CFRP parts.

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适用于多材料车身开发的 CFRP 层压部件的参数化设计和建模方法

钢、铝和 CFRP 的组合应用是未来轻量化车身发展的主要方向。然而，CFRP 部件的各向异性和额外的层压设计变量给多材料车身的开发带来了巨大挑战。本研究建立了一种基于非均匀有理 B-样条曲线（NURBS）的变厚度层压方案参数化设计方法，它可以与现有的结构形状参数化设计方法相结合，制定出完整的 CFRP 部件参数化设计和建模方法。在此基础上，通过引入层压假设，从经典层压理论推导出均质化的中间材料属性，从而实现分步式多材料体优化方法，解决了组件材料设计变量在 CFRP 和合金之间切换时会迭代引入/消除层压设计变量，给优化收敛带来极大困难的难题。所提出的 CFRP 组件参数化建模方法通过制造的车顶梁的实验测试得到了验证，所提出的优化方法应用于车身，使车身的弯曲和扭转刚度及模态频率分别提高了 15.9%、23.9%、18.6% 和 12.2%；车身重量和正面及侧面碰撞的峰值加速度分别降低了 20.2%、9.3% 和 12.7%。通过这项研究，可以对与 CFRP 部件兼容的多材料车身进行前瞻性设计。

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

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.