DYNAMIC-RESPONSE OF DELAMINATED COMPOSITE BEAMS WITH INTERMITTENT CONTACT IN DELAMINATED SEGMENTS

A finite element approach for the analysis of the dynamic response of delaminated composite beams including the effect of intermittent conta ct in the delaminated segments is presented in this study. Based on th e principle of virtual work, the present approach is equivalent to the Lagrange multiplier method. The kinematic constraint conditions due t o contact, which are established by using the node-to-node contact mod el, are exactly satisfied. Using the Newmark method, a simple iterativ e algorithm for solving the dynamic contact problem is presented, and the shortcoming of the original Lagrange multiplier method for numeric al computation is avoided by partitioning the system matrices. Numeric al results for the dynamic response of delaminated composite beams sub jected to both harmonic and impulsive loads are presented, and the eff ect of intermittent contact on the dynamic response of delaminated com posite beams is examined. The frequency response behaviours and impuls ive response behaviours of delaminated composite beams are also presen ted.