A numerical study of coupling effects of hygrothermal environment and geometrical parameter on tensile characteristic length of open-hole composite laminates

被引:3
|
作者
Shan, Meijuan [1 ]
Zhang, Ruifeng [1 ]
Zhao, Libin [2 ,3 ]
机构
[1] Beijing Jiaotong Univ, Sch Phys Sci & Engn, Dept Mech, Beijing 100044, Peoples R China
[2] Hebei Univ Technol, Sch Mech Engn, Tianjin 300401, Peoples R China
[3] Hebei Univ Technol, Key Lab Hebei Prov Scale Span Intelligent Equipmen, Tianjin 300401, Peoples R China
来源
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2023年 / 23卷
基金
中国博士后科学基金;
关键词
Composite; Open-hole laminate; Tensile strength; Characteristic length; Hygrothermal environment; Width-to-hole-diameter ratio; FAILURE ANALYSIS; MECHANISMS; DAMAGE; MODEL;
D O I
10.1016/j.jmrt.2023.01.191
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The open-hole mechanical properties are used to evaluate the superiority of a new composite material in highly-loaded aircraft structures. The critical open-hole tensile strength and characteristic length are significantly affected by both the hygrothermal environment and width-to-hole-diameter ratio (w/D). However, the coupling effects of these two factors remain unknown until now. This paper aims to reveal the coupling effects of hygrothermal environment and w/D on the tensile strength and characteristic length of an open-hole composite laminate by using a proposed two-level finite-element-based method. Seven hygrothermal conditions, which are characterized by a non-dimensional temperature T*, and four w/Ds are considered. The obtained results show that, both the tensile strength and characteristic length change monotonously with the variation of T*, suggesting a considerable influence of the hygrothermal condition. Among the seven hygrothermal conditions, -55 degrees C/dry (CTD), 23 degrees C/dry (RTD) and 70 degrees C/wet (ETW) are the crucial conditions. Under the CTD, RTD and ETW conditions, both the tensile strength and characteristic length are significantly increased by the rising w/D. The increase rates of tensile strength and characteristic length are insusceptible to the hygrothermal condition, and they are respectively 81% and 83% when w/D rises from 2.10 to 8.40. For a certain value of w/D, the tensile strength and characteristic length under the CTD condition are larger than those under the RTD condition, and a reverse trend is observed under the ETW condition. The resulting deviation in tensile strength is slightly related to w/D, whereas the resulting deviation in tensile characteristic length strongly depends on w/D. (c) 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC
引用
收藏
页码:2317 / 2328
页数:12
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