3,322 research outputs found
Failure prediction of T-peel adhesive joints by different cohesive laws and modelling approaches
Get PDFIn this work, Cohesive Zone Modelling (CZM) was used to simulate failure of T-peel bonded joints with 1.5mm thick adherends, respectively, bonded toghether with Loctite Multibond 330 adhesive. The fracture toughness and load-opening behaviour recorded in previous experiments on bonded Double Cantilever Beam (DCB) specimens were taken as reference to calibrate CZM parameters. Two-dimensional models were analysed using the FE code ABAQUS. The failing interface was modeled with the cohesive elements available in this software. The influence of: i) different cohesive law shapes, ii) modeling the presence of the adhesive layer explicitly, was studied
Strength Improvement Of Hybrid Joints With Respect To Bonded Joints: Experimental Assessment And Numerical Simulation
No full textInfluence of cohesive law shape and adhesive modelling on the failure prediction of T-peel joints
No full textSuitability of mixed-mode I/II assessment methods for implementation into the SINTAP procedure
No full textModelling residual strength of friction stir welded panels by means of crack tip opening angle (CTOA)
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Modelling strength of cracked friction stir welded panels by means of the crack tip opening angle (CTOA)
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Fatigue crack growth analysis in porous ductile cast iron microstructure.
No full textThe aim of this work is to propose an engineering procedure to simulate the fatigue strength of ferritic ductile iron castings, developing a case study. Starting from detected defect features, the fatigue behavior is studied numerically looking separately at the two fundamental phases, i.e. crack initiation and crack growth. The fatigue crack growth is simulated by finite element analysis using the Virtual Crack Closure Technique, starting from experimentally detected initiation sites and cast defect dimension on a set of specimens extracted from heavy-duty tile press frames and fatigue tested with a classical staircase methodology. Results show that crack takes longer time to initiate rather than to propagate, and that the local defect morphology plays a crucial role in it. As a deeper understanding of the fatigue crack initiation phase becomes necessary, a 3D reconstruction methodology of casting defects has been setup and the definition of a defect equivalent size in terms of local stress has been attempted
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