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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Design and optimization of defense hole system for biaxial-loaded composite laminates
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Design and optimization of defense hole system for biaxial-loaded composite laminates

机译：双轴加载复合材料层压板防护孔系统的设计与优化

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摘要

Design optimization of defense hole systems placed near the main circular cutout of composite laminated plates subject to biaxial loading is performed in this study. For that purpose, a numerical framework based on finite element models validated experimentally via RGB-photoelasticity and by reproducing selected cases available in literature is developed. Redesign optimization technique is utilized to reach the optimum geometric design parameters of the defense hole system, i.e., size and location. Parametric study for fiber orientation, biaxial loading ratio, stiffness ratio and stacking sequence is conducted as well. Stress concentration near circular cutouts can be reduced by 24.5%, 25.5%, 29.1%, 31.7% and 20.6% for values of the loading ratio equal to, respectively, 0, 0.25, 0.50, 0.75 and 1. Such significant reductions are obtained by introducing four elliptical defense holes along the principal stress direction lined up with fibers.
机译：在这项研究中，对放置在复合层压板的主要圆形切口附近的承受双轴载荷的防御孔系统进行了设计优化。为此，开发了基于有限元模型的数值框架，该模型通过RGB光弹性通过实验验证并通过复制文献中可用的选定案例进行了开发。利用重新设计优化技术来达到防御孔系统的最佳几何设计参数，即尺寸和位置。还进行了纤维取向，双轴载荷比，刚度比和堆积顺序的参数研究。对于分别等于0、0.25、0.50、0.75和1的载荷比值，圆形切口附近的应力集中可以减少24.5％，25.5％，29.1％，31.7％和20.6％。沿主应力方向引入四个椭圆形防御孔，并与纤维对齐。

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