Open AccessThe mode II delamination toughness of arc unidirectional fiber-reinforced composites with ENF test
Author(s) -
Yuetong Kang,
X. Z. Zhang,
L. M. Wang,
Chunxiang Jiang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1765/1/012028
Subject(s) - materials science , composite material , delamination (geology) , arc (geometry) , toughness , strain gauge , fiber , electric arc , geometry , mathematics , physics , electrode , quantum mechanics , paleontology , tectonics , subduction , biology
To obtain the mode II delamination toughness (the energy release rate GIIC) of arc unidirectional fiber-reinforced composites, the end notched flexure (ENF) test with arc specimen was used to study. In terms of theory, the formulas of compliance and GIIC for Arc-ENF specimen were derived by using energy method and Irwin-Kies formula, and the crack length correction and friction coefficient were respectively introduced to correct these formulas, with the verification by the numerical simulation. As the ENF test, the compliance curve of the Arc-ENF specimen was recorded under the condition of the constant loading speed, and the crack tip position was determined by the strain diagram of the specimen in 1-3 plane with the optical strain gauge. Finally, the friction coefficient and the GIIC of the Arc-ENF specimen in the ENF test were determined using the corrected formulas, the numerical simulation method and the ENF test data.