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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 9    September 2018

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Determination of key parameters of Al–Li alloy adhesively bonded joints using cohesive zone model
YUAN Shun(袁顺), LI Yi-bo(李毅波), HUANG Ming-hui(黄明辉), LI Jian(李剑)

State Key Laboratory of High Performance Manufacturing, Central South University,Changsha 410083, China

Abstract:The key parameters of the adhesive layer of a reinforcing patch are of great significance and affect the ability to suppress crack propagation in an Al–Li alloy patch-reinforced structure. This paper proposes a method to determine the key parameters of the adhesive layer of adhesively bonded joints in the Al–Li alloy patch-reinforced structure. A zero-thickness cohesive zone model (CZM) was selected to simulate the adhesive layer’s fracture process, and an orthogonal simulation was designed to compare against the test results. A three-dimensional progressive damage model of an Al–Li alloy patch-reinforced structure with single-lap adhesively bonded joints was developed. The simulation’s results closely agree with the test results, demonstrating that this method of determining the key parameters is likely accurate. The results also verify the correctness of the cohesive strength and fracture energy, the two key parameters of the cohesive zone model. The model can accurately predict the strength and fracture process of adhesively bonded joints, and can be used in research to suppress crack propagation in Al–Li alloy patch-reinforced structures.

 

Key words: Al–Li alloy; cohesive zone model; adhesively bonded joints; fracture energy

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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