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

Autor:	Ryo Higuchi, Tomohiro Yokozeki, Kazuyuki Aoki, Toshio Ogasawara, Shigekazu Uchiyama, Ryoma Aoki
Rok vydání:	2022
Předmět:	Materials science business.product_category genetic structures Composite number Composite laminates Fastener Finite element method Ultimate tensile strength Ceramics and Composites Composite material business Open hole Layer (electronics) Civil and Structural Engineering Stress concentration
Zdroj:	Composite Structures. 280:114926
ISSN:	0263-8223
DOI:	10.1016/j.compstruct.2021.114926
Popis:	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°-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°-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°-layer ratio have higher strengths and the failure of laminates with a higher 0°-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°-layer around the hole, potentially leading to a difference in the OHT and FHT strengths.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::14e699f7814e37598ed65102cc580149 https://doi.org/10.1016/j.compstruct.2021.114926 Zobrazit plný text záznamu Full Text from ScienceDirect