修复风力涡轮机叶片中的固化诱导残余应力和粘弹性效应:分析-数值研究

IF 5.3 Q2 MATERIALS SCIENCE, COMPOSITES
Ayush Varshney , Daniel Paul , Puneet Mahajan , Leon Mishnaevsky Jr.
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引用次数: 0

摘要

在风力涡轮机叶片的疤痕修复过程中,原部件和修复补丁之间的热膨胀系数和化学收缩系数的差异会导致残余应力的产生。当修复后的复合材料结构承受运行循环载荷时,这些残余应力会对其造成损害,并影响其修复后的使用寿命。本文采用分析-数值混合模型来评估疤痕修复复合材料面板中的残余应力。使用基于 Prony 系列的粘弹性模型来描述正在固化的复合材料的材料行为,以更接近地复制现实生活中的影响。对修复后的复合材料样品进行了实验,并对同一模型进行了数值模拟,以研究修复后的机械性能。研究发现,损坏始于疤痕修补层和基底复合材料之间的粘合界面。由此产生的基底复合材料的脱粘和损坏导致了修复部分的失效。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cure-induced residual stresses and viscoelastic effects in repaired wind turbine blades: Analytical-numerical investigation
During scarf repair of wind turbine blades, the difference in coefficients of thermal expansion and chemical shrinkage between the original part and the repair patch leads to the development of residual stresses. These residual stresses are detrimental when the repaired composite structures are subjected to operational cyclic loads and affect their post-repair lifetime. This paper uses a hybrid analytical-numerical model to evaluate the residual stresses in a scarf-repaired composite panel. A Prony series-based viscoelastic model is used to describe the material behaviour of the composite undergoing cure to replicate real-life effects more closely. Experiments on the repaired composite samples and numerical simulations on a model of the same are performed to study the post-repair mechanical behaviour. It is found that the damage initiates at the adhesive interface between the scarf patch and the base composite. The resulting debonding and damage to the base composite leads to the failure of the repaired section.
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来源期刊
Composites Part C Open Access
Composites Part C Open Access Engineering-Mechanical Engineering
CiteScore
8.60
自引率
2.40%
发文量
96
审稿时长
55 days
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