RESPONSE OF HYBRID LAMINATED COMPOSITE PLATES UNDER LOW-VELOCITY IMPACT

The response of hybrid laminated composite plates subjected to low vel ocity impact was investigated using shear deformation theory. As a res ult, the fractional energy loss of two hybrid composite plates with th e same component ratio has different values according to the stacking sequence. A Graphite-Kevlar-Graphite plate has low energy loss and a K evlar-Graphite-Kevlar plate much higher energy loss. Contact forces be tween the impactor and plates, center deflections of the plates and ve locity changes of the impactor to time have different values according to the material properties of the impacted surface. Various composite plates with the same material in the impacted surface behaved with a similar response. (C) 1997 Elsevier Science Ltd.