Development of a physics-based multi-scale progressive damage model for assessing the durability of wind turbine blades

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• 作者：John Montesano¹ ; ^{john.montesano@uwaterloo.ca" class="auth_mail" title="E-mail the corresponding author} ; Hao Chu ^{hao.chu@mail.utoronto.ca" class="auth_mail" title="E-mail the corresponding author} ; Chandra Veer Singh ; ^{chandraveer.singh@utoronto.ca" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Wind turbine blades ; Multi-scale model ; Computational micromechanics ; Damage mechanics ; Finite element analysis ; Fatigue progressive failure
• 刊名：Composite Structures
• 出版年：2016
• 出版时间：1 May 2016
• 年：2016
• 卷：141
• 期：Complete
• 页码：50-62
• 全文大小：2929 K

文摘

A physics-based multi-scale progressive damage model was developed for predicting the durability of wind turbine blade structures. Computational micromechanics was coupled within a continuum damage mechanics (CDM) framework, and implemented through a user-defined subroutine within commercial finite element software, for evaluating sub-critical damage evolution and stiffness degradation of the blade structure. The study is the first step in developing an accurate prediction model for composite wind turbines that accounts for the multi-scale nature of damage in rotor blades. The quasi-static and fatigue simulation results demonstrate the ability of the model to predict the evolution of damage in the critical regions of the blade structure, which is an important contribution and essential for increasing the accuracy of damage tolerance analyses and for certification of composite structures. A parametric study of blade geometric parameters also revealed a correlation with damage evolution, providing valuable insight for optimization of blade designs.