ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Progressive damage analysis of double-strap bonding repaired laminates under buckling compression
Received date: 2015-04-09
Revised date: 2016-02-18
Online published: 2016-02-24
Supported by
Funding of Jiangsu Innovation Program for Graduate Education (KYLX15_0240, KYLX_0297);the Fundamental Research Funds for the Central Universities;Priority Academic Program Development of Jiangsu Higher Education Institutions;Innovation Fund of Jiangsu Province on Industry-Academy-Research Cooperation (BY2014003-10);Nanjing Science and Technology Project (201306010);the Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures (Nanjing University of Aeronautics and Astronautics) (0214G02)
Failure strength and damage evolution process of double-strap bonding repaired composite laminates under buckling compression are of great significance for composite structures repair. A progressive damage model based on strain as well as cohesive zone model (CZM) is developed for bonding repaired composite laminates. Failure criteria coupled with stiffness degradation schemes of composites and adhesive is used for damage initiation and propagation in order to predict the buckling failure strength. The numerical results show the consistency between the numerical results and experimental ones, which indicates that the proposed damage model is validated. Based on this model, the damage evolution process of repaired structures under buckling compression is studied using nonlinear finite element method. The influences of patch parameters on buckling strength are also discussed. The results indicate that damage status during loading on the tensile layers of laminates is different from that on the compressive layers; buckling strength of double-strap bonding repaired composite laminates can be improved with increasing patch diameter and thickness.
DENG Jian , ZHOU Guangming , YIN Qiaozhi , XIANG Chao , CAI Deng'an . Progressive damage analysis of double-strap bonding repaired laminates under buckling compression[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(5) : 1526 -1535 . DOI: 10.7527/S1000-6893.2016.0046
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