Product Overview:
This tutorial covers the simulation of rigid impact on a composite panel consisting of CFRP, TPU, and Aluminum using Abaqus, with a focus on damage assessment. The composite panel is divided into several parts: the CFRP is represented as a shell part with eight distinct layers, while both the thermoplastic polyurethane (TPU) and aluminum components are modeled as three-dimensional solid parts. The projectile is considered a rigid shell. For efficiency, symmetry is utilized, modeling only a quarter of the entire structure.

To simulate the behavior of the CFRP during impact, the elastic properties are coupled with Hashin’s damage criterion. In Abaqus, this criterion evaluates four different failure mechanisms: fiber tension, fiber compression, matrix tension, and matrix compression. Aluminum behavior under impact is modeled using elastic properties with Johnson-Cook hardening and damage, which is particularly suitable for metals subjected to high strain rates. For TPU, the elastic-plastic model is applied along with a ductile damage criterion.

A dynamic explicit step is used in this analysis. Perfect contact is assumed between the TPU-Aluminum and TPU-CFRP interfaces, while general contact, defined with specific contact properties, manages the interaction between the rigid projectile and other components. The outer edges of the panel are fixed, and symmetry boundary conditions are applied. Ensuring a fine mesh is key to achieving accurate results.

After running the simulation, results such as stress, strain, CFRP damage, aluminum damage, and TPU failure are analyzed.