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Modeling the Solvolysis of Composite Materials of Wind Turbine Blades
参考中译:风力涡轮机叶片复合材料溶剂分解建模


          

刊名：Advanced Engineering Materials
作者：Yi Chen（Department of Wind and Energy Systems Technical University of Denmark）
Leon Mishnaevsky（Department of Wind and Energy Systems Technical University of Denmark）
刊号：712E0002/I
ISSN：1438-1656
出版年：2024
年卷期：2024, vol.26, no.16
页码：2302150-1--2302150-11
总页数：11
分类号：TB3
关键词：Recyclable composites；Solvolysis；Sustainability；Wind energy
参考中译：可回收复合材料;溶剂分解;可持续性;风能
语种：eng
文摘：A computational model of the depolymerization of composites during solvolysis of wind turbine blades is developed. The model is based on a phenomenological approach, describing the dissolution of an epoxy matrix as a local phase transition influenced by temperature, solvent diffusion, and local microstructures. The model is implemented in the finite element code Abaqus, using the user-defined field and heat flux subroutines. Parametric studies are carried out to study the influence of defects and heterogeneities on the depolymerization of composite materials. The results show that variations of the solvent diffusivity in the vicinity of fiber/matrix lead to nonhomogeneity of depolymerization, and smaller diffusivity may explain matrix residues remaining on the fibers. Fiber volume density and distribution influence the polymer dissolution rate because the resistance to solvent diffusion arises between fibers. Further, voids in the polymer may lead to a local acceleration of the polymer dissolution. This work also looks into the contributions of diffusion and reaction to depolymerization, and the former dominates. The rate and homogeneity of depolymerization, therefore, depend significantly on the manufacturing quality of composites.
参考中译：建立了风力机叶片溶解过程中复合材料解聚的计算模型。该模型基于唯象方法，将环氧树脂的溶解描述为受温度、溶剂扩散和局部微观结构影响的局部相变。该模型是在有限元程序ABAQUS中实现的，使用了用户定义的场和热流子程序。用参数法研究了缺陷和非均质性对复合材料解聚的影响。结果表明，纤维/基质附近的溶剂扩散系数的变化导致了解聚反应的不均匀，较小的扩散系数可能是残留在纤维上的基质残留的原因。纤维的体积密度和分布会影响聚合物的溶解速度，因为纤维之间会产生溶剂扩散的阻力。此外，聚合物中的空隙可能导致聚合物的局部加速溶解。这项工作还考察了扩散和反应对解聚的贡献，前者占主导地位。因此，解聚的速度和均匀性在很大程度上取决于复合材料的制造质量。



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