Contact law and impact responses of laminated composites

摘要: Abstract : Static identation tests were performed to determine the law of contact between a steel ball and glass/epoxy graphite/epoxy laminated composites. For both composites power with an index 1.5 was found be adequate for loading curve. Substantial permanent deformations noted after unloading. A high order beam finite element used compute dynamic force response composite subjected impact elastic sphere. This program can either classical Hertzian or measured law. simple method has been introduced estimating duration in impacts. (MM)