A new design approach for manufacturing carbon fibers with optimized orientation and thickness achieves weight reduction in fiber reinforced plastics. Carbon fibers, due to their superior strength and lightness, are popular in aerospace engineering applications. Carbon fibers are stronger, stiffer, and lighter than steel. Carbon fibers are usually combined with plastics to form carbon fiber reinforced plastic (CFRP), which is well-known for its tensile strength, rigidity, and high strength-to-weight ratio. Owing to its high demand, researchers have carried out several studies to improve the strength of CFRPs, and most of these have focused on a particular technique called "fiber-steered design," which optimizes fiber orientation to enhance strength.
现在，东京科学大学的研究人员采用了一种新的设计方法，可以优化纤维厚度和方向，从而减轻了钢筋塑料和开门的重量，从而为更轻的飞机和汽车开了。博士解释说：“纤维传导的设计仅优化方向并保持固定的纤维厚度，从而阻止了CFRP的机械性能的充分利用。减轻重量方法也很少被考虑优化纤维厚度。”日本东京科学大学（TUS）的Matsuzaki Ryosuke Matsuzaki，其研究专注于复合材料。
在这种背景下，Matsuzaki-Along博士与他在Tus的同事，Yuto Mori和Naoya Kumekawa提出了一种新的设计方法，用于优化纤维方向和厚度，并根据复合结构中的位置，从而减轻重量与恒定厚度线性层压模型相比，CFRP的强度。他们的发现可以在复合结构发表的一项新研究中阅读。
Their method consisted of three steps: the preparatory, iterative, and modification processes. In the preparatory process, an initial analysis was performed using the finite element method (FEM) to determine the number of layers, enabling a qualitative weight evaluation by a linear lamination model and a fiber-steered design with a thickness variation model. The iterative process was used to determine the fiber orientation by the principal stress direction and iteratively calculate the thickness using "maximum stress theory". Finally, the modification process was used to make modifications accounting for manufacturability by first creating a reference "base fiber bundle" in a region requiring strength improvement and then determining the final orientation and thickness by arranging the fiber bundles such that they spread on both sides of the reference bundle.
同时优化的方法导致了weight reduction greater than 5% while enabling higher load transfer efficiency than that achieved with fiber orientation alone.
研究人员对这些结果感到兴奋，并期待未来实施其进一步减轻常规CFRP零件的方法。
Source : Tokyo University of Science
原始纸的标题：使用曲线纤维路径的复合材料的可变厚度设计
Journal: Composite Structures
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