Indexed by:会议论文

Date of Publication:2019-01-01

Included Journals:CPCI-S、EI

Volume:504

Issue:1

Key Words:Defects; Manufacture; Stiffness, Buckling loads; Degradation model; Fiber placement; Manufacturing defects; Numerical results; Progressive failure; Ultimate loads; Variable stiffness, Failure (mechanical)

Abstract:For the two typical automated fiber placement manufacturing defects, namely the gap and overlap of the variable stiffness laminates, the corresponding fmite element model is established. The perfect model, containing gap defect model and overlap defect model was analyzed to predict their load capacity, respectively. The progressive failure was considered by a 2D Camanho degradation model. The numerical result shows that, compared with the prefect laminate, the buckling load and ultimate load of the laminate designed by the completed overlaps strategy were improved by 10.6% and 9.3% respectively; while the buckling load and ultimate load of the laminate designed by the completed gaps strategy were reduced 16.1% and 18.5% respectively.