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A fully coupled thermo-mechanical analysis for the minimisation of spring-in and process time in ultra-thick components for wind turbine blades
Composites Part A: Applied Science and Manufacturing ( IF 8.7 ) Pub Date : 2020-09-09 , DOI: 10.1016/j.compositesa.2020.106105
G. Struzziero , J.J.E. Teuwen

The paper tackles the multi-objective optimisation of the cure stage of the Vacuum Assisted Resin Transfer Moulding (VARTM) process to manufacture the root insert of wind turbine blades. The aim of the study is to compare the Pareto front obtained from a pure heat transfer analysis, where temperature overshoot is an objective, with the one achieved when a coupled thermo-mechanical analysis is used, in which spring-in deflection is directly addressed. The optimisation methodology links the finite element solution of a heat transfer and a coupled thermo-mechanical problem of the cure process with a genetic algorithm suitable for multi-objective problems. The paper highlights that whilst minimising overshoot temperature is effective in reducing the spring-in, optimal design points might remain hidden. Furthermore, by showing the evolution of transverse residual stresses the paper suggests that designing cure cycles that introduce compressive stresses before vitrification is beneficial to counteract the subsequent tensile stresses generation.



中文翻译:

完全耦合的热机械分析,可最大程度地减少风轮机叶片超厚零件的弹入和加工时间

本文探讨了真空辅助树脂传递成型(VARTM)工艺的固化阶段的多目标优化,以制造风力涡轮机叶片的根部嵌件。这项研究的目的是比较从纯传热分析(以温度超调为目标)获得的帕累托前沿与使用耦合热机械分析(可直接解决弹性偏差)获得的帕累托前沿。优化方法将传热的有限元解决方案和固化过程的热机械耦合问题与适用于多目标问题的遗传算法联系起来。该论文着重指出,虽然最大程度地降低了过冲温度可以有效地减少弹入,但最佳设计点可能仍会隐藏。此外,

更新日期:2020-09-20
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