Prediction of failure in stress concentartion area of a complicated carbon fiber reinforced plastic part considering the microscopic structure

2019 Fiscal Year Final Research Report

• Project/Area Number: 17K06063
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Nihon University
• Principal Investigator: UEDA Masahito 日本大学, 理工学部, 准教授 (80434116)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: 炭素繊維強化プラスチック / 熱可塑 / ハイサイクル成形

Outline of Final Research Achievements

Hot press molding of chopped tapes of a unidirectional carbon fiber reinforced thermoplastic (CFRTP) is excellent in the productivity and recyclability. However, the reorientation of the fibers occurs depending on the geometry of the part during molding, and the material properties change locally. In this study, L-shaped specimens were selected as a corner section of the part and fabricated by the hot press molding of the CFRTP chopped tapes. Bending tests of the L-shaped specimens and the numerical simulation were performed. The corner strength of the L-shaped specimen was predicted by the numerical simulation.

Free Research Field

複合材料工学

Academic Significance and Societal Importance of the Research Achievements

炭素繊維強化熱可塑プラスチック（CFRTP）による複雑形状部品のハイサイクル成形においては，これまでの成形法では生じなかった炭素繊維の局所再配向による材料特性変化の課題がある．このようなCFRTPの複雑形状部品の設計において必要となる成形に依存した材料特性変化を考慮にいれた強度予測手法について検討した．また，X線コンピューター断層撮影法を用いて取得した断層画像より炭素繊維の局所配向状況を取得する方法についても提案した．