A simple modeling approach to predicting damage progress in unidirectionally arrayed chopped strand laminates

Shigeki Yashiro, Tatsuya Okuda, Hiroto Nagai, Keiji Ogi

研究成果: 会議への寄与タイプ学会誌査読

抄録

Formability, as well as strength and stiffness, is important to utilize carbon-fiber-reinforced plastics (CFRPs) in automobiles for weight saving, because their components have complex geometries. However, the microstructure of composites with discontinuous fibers cannot be controlled when using conventional molding compounds, and therefore, enhancing all the properties is difficult. The unidirectionally arrayed chopped strands (UACS), in which a prepreg sheet with unidirectional and continuous reinforcing fibers is cut in a regular manner, are promising to overcome the difficulty. Although a UACS layer is an assembly of many small sheets, the high structural regularity leads to high mechanical properties. Analytical evaluation of UACS laminates is essential to optimize fiber-cutting (slit) pattern and to achieve better performance, but building a complex mesh near the slits is a severe obstacle. This study therefore proposes a simple approach to model the microstructure of UACS laminates and to predict their damage extension. UACS laminates have two key microstructures, namely the stacked layers and the slit pattern, and the layer-wise modeling and the extended finite-element method (XFEM) are adopted for the laminated structure and the discontinuities owing to slits, respectively. Static tensile strength of quasi-isotropic UACS laminates with diagonal continuous slits was predicted and compared with the reported experiment results. The predicted strength agreed well with the experiments, and the tensile strength of the UACS laminates increased with decreasing the inclined slit angle, owing to the less probability of delamination extension from the slits.

本文言語英語
出版ステータス出版済み - 2019
イベント22nd International Conference on Composite Materials, ICCM 2019 - Melbourne, オーストラリア
継続期間: 8月 11 20198月 16 2019

会議

会議22nd International Conference on Composite Materials, ICCM 2019
国/地域オーストラリア
CityMelbourne
Period8/11/198/16/19

!!!All Science Journal Classification (ASJC) codes

  • 工学一般
  • セラミックおよび複合材料

フィンガープリント

「A simple modeling approach to predicting damage progress in unidirectionally arrayed chopped strand laminates」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル