高温下复合材料层合板ⅰ型分层的温度相关黏结区模型

IF 5.6 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-08-14 DOI:10.1016/j.tafmec.2025.105176

Ali Esmaili, Fathollah Taheri-Behrooz

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引用次数: 0

摘要

本研究通过实验测试和数值模拟，研究了玻璃/环氧层压板在室温至70℃范围内的I型断裂行为。实验结果表明，随着温度的升高，起裂韧度和扩展韧度均有所增加。这种增强归因于树脂软化，提高延展性，扩大裂纹尖端塑性区，促进纤维桥接增加。基于这些发现，开发并验证了不同温度下断裂韧性的预测方程，与实验数据相比，预测误差约为4%。该方程成功应用于以往研究的独立实验数据，进一步证实了其准确性。随后，基于所开发的方程，在Abaqus软件中通过UMAT子程序实现了温度相关的三线性内聚区模型，以模拟I型分层生长。有限元分析结果验证了该模型的准确性。

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Temperature-dependent cohesive zone model for modeling mode I delamination of composite laminates under elevated temperature

This study investigates the Mode I fracture behavior of glass/epoxy laminates through experimental testing and numerical simulation across a temperature range of room temperature to 70 °C. Experimental results demonstrate an increase in initiation and propagation fracture toughness with rising temperature. This enhancement is attributed to resin softening, improving ductility, and an enlarged crack-tip plastic zone, promoting increased fiber bridging. Based on these findings, a predictive equation for fracture toughness at various temperatures was developed and validated, exhibiting a prediction error of approximately 4 % when compared to experimental data. The equation’s accuracy was further confirmed by its successful application to independent experimental data from previous studies. Subsequently, a temperature-dependent tri-linear cohesive zone model, based on the developed equation, was implemented in Abaqus software via a UMAT subroutine to simulate mode I delamination growth. Finite element analysis results validated the accuracy of this model.

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.