Mohammad Tahaye Abadi - Assistant professor Aerospace Research Institute, Ministry of Science,Research and Technology Tehran, Iran
Hamid Reza Daghyani - Associate professor, Amirkabir university of Technology, Tehran, Iran
Shahriar Fariborz - Associate professor, Amirkabir university of Technology, Tehran, Iran

An experimental sheet forming analysis is performed to evaluate the wrinkling defects in thermoplastic laminates reinforced with unidirectional continuous fibers. The composite laminates are manufactured using a film-stacking method in which polypropylene is used as matrix and glass fibers as reinforcement. A stamp forming process is carried out to produce a hemispherical geometry in the reinforced laminates. The laminate deformation is analyzed utilizing grids drawn on the initial geometry and measuring the coordinates of the grid nodes after deformation. The wrinkling defects are observed in some regions of the deformed geometry in which strain distributions are calculated and examined to determine the reasons of defects.

Composites, Stamp Forming, Wrinkling