Delamination properity of 2060 aluminium lithium alloy laminate

2017 International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Guo, Xiang^1,2 ; Huang, Yi^1 ; Tong, Dihua^1 ; Ma, Shaojun^1

AECC Beijing Institute of Aeronautical Materials, China Beijing Key Laboratory of Aeronautical Materials Testing, Eval. Aviat. Key Lab. of Science and Technology on Aeronautical Materials Testing and Evaluation, Beijing

100095, China^1

Beihang University, Beijing

100191, China^2

关键词: Aluminium-lithium alloys;    Damage tolerance designs;    Delamination growth;    Lap-shear specimen;    Linear fitting;    Stress levels;    Stress ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/322/3/032009/pdf
DOI  :  10.1088/1757-899X/322/3/032009

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Delamination is an significant property of aluminium lithium alloy laminate for damage tolerance design. Double Crack Lap Shear specimens of «2/1» structure are used for testing delamination properity. Experiments of 2 stress ratio conditions R=0.06, 0.5 are conducted, and 5 stress levels for each stress ratio. Delamination growth data b-N are obtained from 4 crack tips' locations. The energy release rate, Gd, of the «2/1» structure laminate are calculated. Alderliesten modelis used for describing delamination growth db/dN and energy release rate Gd. Parameters Cdand ndin Alderliesten model are determined for R=0.06 and R=0.5 by linear fitting. An analysis is made by comparing the results of different stress ratio conditons.