This paper presents an experimental study for the assessment of a three-dimensional Progressive Fatigue Damage Model (PFDM) with a carbon fiber/epoxy (AS4/3501–6) material system. Specimens with a central circular hole were selected to represent notched composite structures. Digital Image Correlation (DIC) was used to monitor the surface strain evolution throughout the fatigue lifetime. The PFDM model was implemented in the commercial finite element software ABAQUS using the user material (UMAT) utility. Residual stresses from the composite manufacturing cycle are included in the fatigue damage modeling. Results are presented that compare experimental and predicted strain distributions and fatigue lives. Comparisons between the experimental and simulated response highlight the value of the PFDM model while demonstrating its shortcomings.

本文提出了一项实验研究，用于评估碳纤维/环氧树脂（AS4 / 3501–6）材料系统的三维渐进疲劳损伤模型（PFDM）。选择具有中心圆形孔的标本来表示带凹口的复合结构。使用数字图像关联（DIC）来监视整个疲劳寿命中的表面应变演变。PFDM模型是使用用户材料（UMAT）实用程序在商业有限元软件ABAQUS中实现的。复合材料制造周期中的残余应力包括在疲劳损伤模型中。给出了比较实验和预测的应变分布以及疲劳寿命的结果。实验和模拟响应之间的比较突出了PFDM模型的价值，同时证明了它的缺点。