复合材料层压板疲劳性能评估的模型和方法

Models and Methodologies for Fatigue Property Prediction of Composite Laminates

复合材料层压结构的单轴和多轴疲劳性能研究已在表征模型和方法等方面取得了显著进展。针对纤维增强复合材料层压板疲劳性能的分析预测,综述了疲劳损伤演化的曲线模型、剩余刚度模型、剩余强度模型、疲劳模量模型和S–N曲线模型的研究进展,对疲劳失效判据和疲劳寿命预测的模型和方法进行了总结和分析,并就疲劳研究的不足进行了综合阐述。研究表明,疲劳损伤演化和寿命预测的理论模型多为宏观唯象模型,很少涉及微细观损伤形式和机理;针对多向层合板寿命预测的有限元方法虽然具有广泛适用性,但是还不足以模拟复合材料的真实损伤路径和历程。在此基础上,对后续复合材料疲劳损伤及寿命研究的重点方向进行了展望。

Significant progress has been achieved in the research field of characterization models and methodologies for uniaxial and multiaxial fatigue properties of laminated composite structures.In this paper,the damage curve models,residual stiffness models,residual strength models,fatigue modulus models and S–N curve models for fatigue damage evolution were reviewed,aiming at analyzing and predicting fatigue property of fiber reinforced composite laminates.Furthermore,the fatigue failure criteria and fatigue life predicting models and methodologies were summarized and analyzed.Meanwhile,the deficiency in fatigue research of composite materials was elaborated.The research shows that the theoretical models of fatigue damage evolution and life prediction are mostly macroscopic phenomenological models,and rarely involve micro-damage forms and mechanisms.Although the finite element method for life prediction of multidirectional laminates has wide applicability,it is not enough to simulate the real damage path and course of composite materials.Based on this analysis,the key future research direction of fatigue damage and life of composites was prospected.