Modelling of dynamic flexural response of composite eco-structure beams using a 3D elastic–plastic damage model

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composite Structures Pub Date : 2025-04-01 DOI:10.1016/j.compstruct.2025.119119

John Susainathan , Enrique Barbero , Sonia Sanchez , Arthur Cantarel , Florent Eyma

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Abstract

The dynamic flexural behaviour of sandwich beams made of a composite eco-structure (plywood and flax/epoxy composite skin) is studied using an explicit 3D numerical model. The model includes a constitutive elastic–plastic behaviour with a plastic potential and its consistency multiplier-based yield stress criteria, a modified 3D-Hashin damage initiation and a strain threshold-based exponential damage evolution model. Experimental tests at different impact energies were carried out to validate the proposed model. The variation of force with time and displacement as well as the velocity–time profile are accurately predicted. The model is able to capture the stiffness degradation, post-peak softening, de-kinking and unloading phase that appear in the force–displacement curve. The validated model is employed to investigate the evolution of inter- and intralaminar damage for different impact energies. The most relevant damage modes are delamination and compressive damage modes (transverse and normal) for the impact energies studied.

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基于三维弹塑性损伤模型的复合生态结构梁动力弯曲响应建模

采用显式三维数值模型研究了由复合生态结构（胶合板和亚麻/环氧复合材料表皮）制成的夹层梁的动态弯曲性能。该模型包括基于塑性势的本构弹塑性行为及其一致性乘数屈服应力准则、改进的3D-Hashin损伤起始和基于应变阈值的指数损伤演化模型。通过不同冲击能量下的实验验证了模型的有效性。准确地预测了力随时间和位移的变化以及速度-时间剖面。该模型能够捕捉力-位移曲线中出现的刚度退化、峰后软化、去扭结和卸载阶段。利用该模型研究了不同冲击能量下板间损伤和板间损伤的演化规律。对于所研究的冲击能，最相关的损伤模式是分层和压缩损伤模式（横向和正向）。

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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.