A simplified layered beam approach for predicting ply drop delamination in thick composite laminates

被引：35
|
作者：
Gan, Khong Wui [1 ]
Allegri, Giuliano [2 ]
Hallett, Stephen R. [3 ]
机构：
[1] Univ Southampton Malaysia Campus, Fac Engn & Environm, Kota Ilmu Educ Iskandar, Nusajaya 79200, Johor, Malaysia
[2] Imperial Coll London, Dept Aeronaut, South Kensington Campus, London SW7 2AZ, England
[3] Univ Bristol, Adv Composites Ctr Innovat & Sci, Bristol BS8 1TR, Avon, England
来源：
MATERIALS & DESIGN | 2016年 / 108卷
基金：
英国工程与自然科学研究理事会;
关键词：
Composite laminate; Ply drop-off; Delamination; Numerical analysis; DAMAGE TOLERANCE DESIGN; INTERLAMINAR STRESSES; METHODOLOGY; ENERGY; PLIES; STRENGTH; MODEL; LOAD;
D O I：
10.1016/j.matdes.2016.06.105
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The prediction of delamination onset is a challenging task in the design of thick tapered composite laminates, where multiple ply terminations ("drop-offs") are present. This paper addresses the development of a global local finite element-based design approach for tapered laminates, whereby layered Timoshenko beam models are employed to predict delamination initiation from individual drop-offs. This modelling strategy provides a fast and conservative method for evaluating the strength of tapered composite laminates. Parametric test cases are presented in order to validate the methodology and understand its limitations. Finally, the application of the tool to a relatively thick tapered composite test specimen comprising multiple ply-drops is demonstrated. (C) 2016 The Authors. Published by Elsevier Ltd.
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页码：570 / 580
页数：11
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