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| Estimation Model of Laminated Board Stiffness Reduction Based on Stress Equivalence Method |
| Received:August 23, 2011 |
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| DOI： |
| KeyWord:stress equivalence damage stiffness |
| Author | Institution |
| ZHANG Tai-feng |
Qingdao Branch of Navy Aeronautic Engineering Academy，Qingdao，China |
| YANG Xiao-hua |
Qingdao Branch of Navy Aeronautic Engineering Academy，Qingdao，China |
| SUN Wen-Sheng |
Qingdao Branch of Navy Aeronautic Engineering Academy，Qingdao，China |
| ZHANG Yong |
Qingdao Branch of Navy Aeronautic Engineering Academy，Qingdao，China |
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| Abstract: |
| Based on the research result of mesomechanics, the crack damage and fiber breakage damage of non-orthogonal laminated matrix were analyzed with stress equivalence method. The damage of corresponding layer was calculated and the estimation model laminated board stiffness reduction under fatigue load was established. The stiffness degradation of [0/±45]s glass fiber reinforced epoxy composite laminated board was predicted with the model, the result of which agrees with the test result. |
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