ANALYTICAL TRANSIENT ANALYSIS OF LAYERED COMPOSITE MEDIUM SUBJECTED TO DYNAMIC INPLANE IMPACT LOADINGS

In this study, the dynamic transient response of a layered composite w ith n layers under dynamic inplane impact loading on the surface is in vestigated in detail. One of the objectives of this study is to develo p an effective analytical method for determining transient solutions. Complete solution of the contribution for each wave is expressed in an explicit form. These solutions will provide reliable solutions that c an guide the development of numerical methods. In analyzing this probl em, the waves reflected and refracted by the interfaces within the com posite must be taken into account, which will generate infinite waves on each composite layer and make the problem extremely complicated to analyze. The problem is solved by using the Laplace transform method a nd the inverse transform is evaluated by means of Cagniard's method. T he transient responses of stresses and displacement in the transform d omain on each layer are expressed in a closed form. The equation for e ach wave front propagating in the layered composite is determined in t his study. For the numerical investigation of the transient response o f stress, a two layered composite medium is analyzed in detail. Copyri ght (C) 1996 Elsevier Science Ltd.