During countersunk hole machining, defects like geometrical deviation of the chamfer angle and delamination are easily introduced\ninto the structure. To investigate the influences of geometrical deviation on delamination propagation around the countersunk hole\nduring assembly, a progressive damage model (PDM) combining cohesive element was proposed and validated. Numerical analyses\nwere then carried out to study delamination propagation behavior under the influences of geometrical parameters including\ndelamination factor, chamfer angle, and location of delamination. The results show that when delamination appears at the\ntransition area of the countersunk hole, the load causing the delamination evolution is much smaller than other cases.
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