Deformations and strains in a thick adherend lap jointDisplacement fields in a thick adherend lap joint were measured by high-sensitivity moire interferometry. Contour maps of in-plane U and V displacements were obtained across adhesive and adherend surfaces. Loads ranged from a modest load to a near-failure load. Quantitative results are given for displacements and strains in the adhesive and along the adhesive/adherend boundary lines. The results show nearly constant shear strain in the adhesive, nonlinear strains as a function of load or average shear stress, and viscoelastic or time-dependent response. Longitudinal normal strains in the adhesive are nearly two orders of magnitude less than the shear strains. With its subwavelength displacement resolution and high spatial resolution, moire interferometry is especially well suited for deformation studies of adhesive joints.
Document ID
19890022713
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Post, D. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Czarnek, R. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Wood, J. D. (Virginia Polytechnic Institute and State University Blacksburg, United States)
Joh, D. (Missouri-Rolla, University Rolla, United States)