Investigating the impact of cross-sectional area on the crushing characteristics of axially-loaded hemispherical composite shells

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES Composites Part C Open Access Pub Date : 2024-07-01 DOI:10.1016/j.jcomc.2024.100479

Aamir Dean , Elsadig Mahdi

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Abstract

The research focus has shifted towards lightweight structures with high energy absorption capabilities due to advancements in automotive safety technology. This study specifically investigates the impact of cross-sectional area on the energy absorption characteristics of hemispherical composite shells. The experimental phase involves characterizing a glass fiber epoxy composite, followed by the manufacture of hemispherical composite shell specimens with varying cross-sectional areas. These specimens undergo quasi-static axial compressive loading, and the energy absorption parameters are analyzed. The results indicate a significant influence of the composite cross-sectional area on the crushing behavior of hemispherical shells, with a observed decrease in specific energy absorption as the cross-sectional area increases. Additionally, a 3D Finite Element (FE) model is created using ABAQUS FE code to numerically simulate the crushing process. The model’s predictions are compared and validated against experimentally measured values, demonstrating a satisfactory correlation.

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研究横截面积对轴向加载半球形复合材料壳体破碎特性的影响

由于汽车安全技术的进步，研究重点已转向具有高能量吸收能力的轻质结构。本研究专门探讨了横截面积对半球形复合材料壳体能量吸收特性的影响。实验阶段包括对玻璃纤维环氧树脂复合材料进行表征，然后制造具有不同横截面积的半球形复合材料壳体试样。对这些试样进行准静态轴向压缩加载，并对能量吸收参数进行分析。结果表明，复合材料横截面积对半球形壳体的挤压行为有显著影响，可以观察到随着横截面积的增大，比能量吸收也随之减小。此外，还使用 ABAQUS FE 代码创建了三维有限元 (FE) 模型，对挤压过程进行数值模拟。该模型的预测值与实验测量值进行了比较和验证，显示出令人满意的相关性。

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