WSEAS Transactions on Applied and Theoretical Mechanics
Print ISSN: 1991-8747, E-ISSN: 2224-3429
Volume 11, 2016
Cumulative Damage Assessment to Airdrop Vehicle Hull for the Landing Process
Authors: , , ,
Abstract: In order to test the shock and vibration resistance performance of an airdrop vehicle, one test way is by actual equipment airdrop ,but this way needs large human and financial resources and the experimental conditions can not be controlled well, numerical simulation analysis become another effective way. This article first built the dynamic model of the whole vehicle based on virtual prototype technology, analysis the airbag force at vehicle landing process by tools of finite element method, next did the dynamic simulation to the vehicle landing process and got the loads time history on the hull, then applied these loads on the finite element model of the hull and did the transient dynamic response to the model, got the stress and strain time history of the hull, last did the cumulative damage assessment based on the strain time history of the hull combined the Lemaitre damage model and the material parameter.The calculation results show that the damage variable D has a linear relationship with the number of landing times and after 6 times of limit landing process, the part of hull will failure.The research can provide reference to the shock and vibration test for large airdrop equipment.
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Pages: 76-84
WSEAS Transactions on Applied and Theoretical Mechanics, ISSN / E-ISSN: 1991-8747 / 2224-3429, Volume 11, 2016, Art. #10