Orthotropic elasto-plastic behavior of AS4/PEEK thermoplastic composite in compression

Effects of Impactor Geometry on the Low-Velocity Impact Behaviour of Fibre-Reinforced Composites: An Experimental and Theoretical Investigation

“…where the value of a 66 can be readily determined from off-axis experiments conducted at different values of the off-axis angle using a unidirectional composite [27,[31][32][33]. The relationship between the effective stress, σ eff , and the effective plastic strain, ε p eff , can be expressed as a power-law function, given by [31][32][33]:…”

“…where A and n are nonlinear coefficients, which are determined by fitting to the σ eff versus ε p eff data, again as obtained from the off-axis experiments when different off-axis angles are employed using a unidirectional composite [27,[31][32][33]. The determination of the parameter, a 66 , and the nonlinear coefficients, A and n, allow the calculation of the incremental plastic strain tensors, dε p ij i; j ¼ 1; 2; 3 ð Þ , as given by:…”

Modelling damage in fibre-reinforced thermoplastic composite laminates subjected to three-point bend loading

“…Now, Sun and Chen [5,8,19] have simplified Eq. (20) by incorporating the fact that for most unidirectional fibre composites the stress versus strain relation in the fibre direction is basically linearly elastic and they also considered the composite to be transversely isotopic material in the 2-3 plane.…”

Numerical modelling of spoolable thermoplastic composite pipe (TCP) under combined bending and thermal load

“…Temperature-dependency has often been overlooked in composite analyses, one infers due to the difficulty in sourcing properties or practical/ cost limitations associated with experiments (which were outwith this work scope). Properties here were compiled from the literature (Coquill and Adams 1989; Cytec 2012; Grove 1988 1985; Ramey and Palazotto 1989;Rule and Sparks 1990;Sun and Rui 1989;Yousefpour and Nejhad 2004). To the authors' best knowledge, this list represents the most complete compilation of properties for the temperature range.…”