Bridging stress distribution in center-cracked fiber reinforced metal laminates: modeling and experiment

A theoretical model for the distribution of the bridging stress in center-c racked tiber reinforced metal laminates (FRMLs) was developed based upon fr acture mechanics analysis, and a test method presented. The model includes the effect of the delamination shape and size, the saw-cut size and the she ar deformation of the adhesive. Moire technique was employed for measuring the crack opening profiles in the test method. The bridging stresses in CCT specimens of 2/1 GLARE were tested. The results of the bridging stress cal culated by the present model were compared with test results, and good agre ement was achieved. Based on the present model, the factors affecting the d istribution of the bridging stress in FRMLs were analyzed. Delamination sha pe and size, and the saw-cut size were identified as the main factors. (C) 1999 Elsevier Science Ltd. All rights reserved.