Effects of ply thickness and 0°-layer ratio on failure mechanism of open-hole and filled-hole tensile tests of thin-ply composite laminates

被引：32
作者：
Aoki, Ryoma [1 ]
Higuchi, Ryo [1 ]
Yokozeki, Tomohiro [1 ]
Aoki, Kazuyuki [2 ]
Uchiyama, Shigekazu [2 ]
Ogasawara, Toshio [3 ]
机构：
[1] Univ Tokyo, Dept Aeronaut & Astronaut, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
[2] Aerosp Co, SUBARU Corp, Utsunomiya 1-1-11, Utsunomiya, Tochigi 3208564, Japan
[3] Tokyo Univ Agr & Technol, Dept Mech Syst Engn, 2-24-16 Naka Cho, Koganei, Tokyo 1848588, Japan
来源：
COMPOSITE STRUCTURES | 2022年 / 280卷
基金：
日本学术振兴会; 日本科学技术振兴机构;
关键词：
Polymer-matrix composites (PMCs); Strength; Damage observation; Finite element analysis (FEA); PROGRESSIVE DAMAGE; STRENGTH;
D O I：
10.1016/j.compstruct.2021.114926
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Thin-ply technology provides increasing possibilities for composite structures, expanding the design space for ply thickness and laminate layup. This study examines the effects of ply thickness and the 0 degrees-layer ratio on the strength and damage behavior of thin-ply composite laminates. We conducted open-hole tensile (OHT) and filled-hole tensile (FHT) tests on laminates with various ply thicknesses and 0 degrees-layer ratios, observing the internal damage via X-ray radiography. It was confirmed that the damage retardation effect of the thin-ply reduced both the OHT and FHT strengths. Furthermore, the results revealed that laminates with a higher 0 degrees-layer ratio have higher strengths and the failure of laminates with a higher 0 degrees-layer ratio transitioned to splitting-dominated failure. Finite element analysis of the fastener restraint indicated that the fastener restraint alleviated the stress concentration in the 0 degrees-layer around the hole, potentially leading to a difference in the OHT and FHT strengths.
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页数：10
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