KAZURO KAGEYAMA, KATSUNOBU NONAKA
This paper proposes a novel method for assessing the in-plane fracture toughness of carbon fiber reinforced plastics (CFRP). The objective is to develop a testing procedure suitable for CFRP, which exhibits extreme anisotropy. A new single-edge-notched (SEN) tension specimen and loading grip system are introduced, specifically designed for this anisotropic material. The methodology incorporates a personal computer program to evaluate the stress intensity factor (K) related to the SEN specimen's anisotropic nature. This program calculates KQ from the critical loads encountered during crack propagation. Additionally, an alternating current (a.c.) electrical potential drop measuring system, equipped with a temperature compensation circuit, is established to determine the precise moment of crack initiation. Thereafter, the technique is applied to carbon/epoxy [0/90] laminates to perform tests on the fracture toughness. The resulting procedure for evaluating Kc links the measured KQ and the electrical potential drop at the crack propagation stage. This comprehensive approach enhances the understanding of fracture mechanics in anisotropic materials and facilitates improved testing standards for CFRP applications.
@article{f8b6eb40-f09f-45c1-b3e3-8073b1706f99,
title={ICCM5 V1 28},
author={KAZURO KAGEYAMA and KATSUNOBU NONAKA},
year={2026},
language={en}
}TY - JOUR TI - ICCM5 V1 28 AU - KAZURO KAGEYAMA AU - KATSUNOBU NONAKA PY - 2026 LA - en ER -
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