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-cracked tiber reinforced metal laminates (FRMLs) was developed based upon fracture mechanics analysis, and a test method presented. The model includes the effect of the delamination shape and size, the saw-cut size and the shear 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 calculated by the present model were compared with test results, and good agreement was achieved. Based on the present model, the factors affecting the distribution of the bridging stress in FRMLs were analyzed. Delamination shape and size, and the saw-cut size were identified as the main factors. (C) 1999 Elsevier Science Ltd. All rights reserved.