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Optimization of curvilinear fiber orientation of composite plates and its experimental validation

机译：复合板曲线纤维取向的优化及其实验验证

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摘要

Variable stiffness composite (VSC) is a viable design extension of carbon fiber reinforced plastic (CFRP) laminates to obtain unique mechanical properties by changing the fiber orientation in a curvilinear manner. We optimized a VSC for open-hole tension laminates considering the automatic processing by the tow prepreg curve placement and evaluated the strength improvement with experiments. Multi -objective optimization using fracture criterion and mean curvature as objective functions resulted in higher strength gains for solutions with higher mean curvature and lower processability. Besides, by giving the molding conditions as constraints for optimization, the strength was improved while satisfying the molding conditions. The fabrication of optimum VSCs involved using a tabletop automated fiber placement. Strength tests showed a 34.3% improvement in the curvilinear prepreg path.
机译：可变刚度复合材料（VSC）是碳纤维增强塑料（CFRP）层压材料的可行设计延伸，以通过以曲线方式改变纤维取向来获得独特的机械性能。考虑到牵引曲线放置的自动处理，优化了用于开孔张力层压板的VSC，并通过实验评估强度改善。使用骨折标准的多种目标优化和均值曲率作为目标函数导致具有更高平均曲率和降低的可加工性的溶液的强度增益。此外，通过将模塑条件作为优化的约束提供，在满足模塑条件的同时提高了强度。使用桌面自动化纤维放置涉及最佳VSC的制造。强度试验显示曲线预浸料坯路径的改善34.3％。

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