Abstract
Abstract Polytetrafluoroethylene (PTFE) films with different pore percent were placed at the bonding interface as artificial defects and then a method of fabricating weak bond joints with different bond strength was developed to simulate the adhesive film porosity likely occurring in polymer composite bond joint. It was found that the adhesive interfacial back wave height is approximately linear functions of PTFE pore percent. The joint strength also approximately decreases linearly as the PTFE pore percent decreases. Based on the test and simulation results, functions were proposed to estimate the adhesive porosity and single lap shear (SLS) strength with respect to the A-scan image and single lap shear strength curve in this paper.
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