Modeling non-linear rate-dependent behavior in fiber-reinforced composites

The rate-dependent behavior of AS4/PEEK (APC-2) thermoplastic composite has been characterized over a wide strain rate range (10 × 10−6 to 1000s−1). The low to moderate strain rate experiments were conducted with a servo-hydraulic testing machine, while the high strain rate experiments were conducted with a Split Hopkinson Pressure Bar. Two rate-dependent models are introduced to model the material response. Both models are developed by using a...