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In the present work, damage propagation in thermoplastic composite laminates subjected to quasi-static tensile loading was numerically simulated using different damage models. The simulation was performed using the commercial finite element suite LS-Dyna, where various material models were evaluated based on their ability to simulate the thermoplas...
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... The failure sequence within the laminates, independently of the interface damage, was captured using progressive damage modeling. The LS-Dyna's MAT_162 material model was selected as it has been proven efficient and accurate in modeling interlaminar and intralaminar failure for thermoplastic laminates [13]. ...
The mechanical response of co-consolidated thermoplastic joints containing Refill Friction Stir Spot Welds (RFSSW) as Disbond Arrest Features (DAFs) was characterized by mechanical tests and simulated by numerical analyses. Additionally, the technique of Induction Low Shear Friction Stir Riveting (ILSFSR) as DAF was numerically investigated. The thermoplastic substrates were manufactured from carbon fiber reinforced polyaryletherketone (PAEK) matrix prepregs and joined in Single Lap Shear (SLS) and Cracked Lap Shear (CLS) configurations via the co-consolidation technique. During testing, the crack propagation was monitored using frequent intermediate C-Scanning. Numerical simulations were performed using a FE model developed in the LS-Dyna code, where crack initiation and growth at the co-consolidated interface was simulated using the Cohesive Zone Modeling method. Installation parameters were examined for the DAFs with regards to their efficiency. Overall, the numerical study revealed the ability of both the DAFs to retard the crack growth, in contrast to the mechanical tests' results showing limited crack retardation effectiveness of the DAF.
