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Abstract An experimental program was conducted to evaluate the performance of various CFRP-steel double-lap shear (DLS) joints in terms of strength, failure mode, load–displacement behavior, and interfacial shear stress distribution.… Click to show full abstract
Abstract An experimental program was conducted to evaluate the performance of various CFRP-steel double-lap shear (DLS) joints in terms of strength, failure mode, load–displacement behavior, and interfacial shear stress distribution. The variables studied through this program are: (i) surface preparation method, (ii) CFRP/adhesive system, and (iii) bond length. Non-linear finite-element models were developed to simulate the behavior of specimens with different failure modes. From all considered configurations, grit-blasted specimens with strand sheet CFRP exhibit the highest strength, maximum displacements, and interfacial shear stresses. In this configuration, specimens exhibited mixed interfacial/cohesive failure. In all other configurations, specimens failed at the adhesive-steel interface.
Journal Title: Composite Structures
Year Published: 2021
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