Evaluation of dynamic fracture toughness of unidirectional CFRP laminates

被引：10
|
作者：
Adachi, T
Arai, M
Sakabe, N
Matsumoto, H
机构：
[1] Tokyo Inst Technol, Dept Engn Sci & Mech, Meguro Ku, Tokyo 1528552, Japan
[2] Toyota Motor Corp, Toyota, Aichi 4718572, Japan
[3] Tokyo Natl Coll Technol, Hachioji, Tokyo 1938610, Japan
来源：
JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING | 2000年 / 43卷 / 02期
关键词：
composite materials; fracture toughness; fracture mechanics; J-integral; impact strength; ENF test;
D O I：
10.1299/jsmea.43.179
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In the present paper, dynamic interlaminar fracture toughness of carbon fiber reinforced plastics (CFRP) is estimated by split Hopkinson's pressure bar test using end notched flexure (ENF) specimens. The dynamic deformation of the specimen is approximated by classical beam theory with Laplace transform. The Mode II fracture toughness of unidirectional CFRP is computed by the analyzed deflection of the specimen employing the scheme of J -integral with the measured impulsive load and reactions at the supported points. Through some numerical calculations, the validity of the J -integral for the dynamic ENF test is confirmed. The experimental results for carbon/epoxy laminates show that dynamic interlaminar fracture toughness of the unidirectional specimen has dependency on a deflection rate.
引用
收藏
页码：179 / 185
页数：7
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