Optimizing Variable-Axial Fiber-Reinforced Composite Laminates: The Direct Fiber Path Optimization Concept
Optimizing Variable-Axial Fiber-Reinforced Composite Laminates: The Direct Fiber Path Optimization Concept
复制标题
DOI：
10.1155/2019/8260563
复制
发表时间：
2019-01-01
影响因子：
--
通讯作者：
Heinrich, Gert
中科院分区：
文献类型：
--
作者：
Bittrich, Lars;Spickenheuer, Axel;Heinrich, Gert
碳纤维增强聚合物（CFRP）复合材料的各向异性特性为碳纤维增强聚合物（CFRP）复合材料的研究提供了一种新的思路。作为多轴复合材料设计概念的补充，用曲线纤维增强的层合板被称为变轴向（也称为变刚度和变角度丝束）。定制纤维铺放（TFP）技术能够通过使用合适的刺绣机来制造具有可变轴向纤维设计的纺织品预成型件。这项工作介绍了一种新的概念，曲线纤维增强复合材料的模拟和优化，其中的新奇依赖于本地优化的纤维角度和固有的厚度建立伴随。这个框架被称为直接光纤路径优化（DFPO）。除了描述DFPO，它的能力是通过优化CFRP开孔拉伸试样的例证。主要结果表明，一个明显的改善相比，目前常用的方法，应用主应力轨迹的可变轴向加固模式。
The concept of aligning reinforcing fibers in arbitrary directions offers a new perception of exploiting the anisotropic characteristic of the carbon fiber-reinforced polymer (CFRP) composites. Complementary to the design concept of multiaxial composites, a laminate reinforced with curvilinear fibers is called variable-axial (also known as variable stiffness and variable angle tow). The Tailored Fiber Placement (TFP) technology is well capable of manufacturing textile preforming with a variable-axial fiber design by using adapted embroidery machines. This work introduces a novel concept for simulation and optimization of curvilinear fiber-reinforced composites, where the novelty relies on the local optimization of both fiber angle and intrinsic thickness build-up concomitantly. This framework is called Direct Fiber Path Optimization (DFPO). Besides the description of DFPO, its capabilities are exemplified by optimizing a CFRP open-hole tensile specimen. Key results show a clear improvement compared to the current often used approach of applying principal stress trajectories for a variable-axial reinforcement pattern.