Exploring the dynamic compression behavior of glass/epoxy composite through cutting-edge numerical modeling techniques

Abstract

Experimental tests are essential for obtaining reliable results. However, fabricating specimens, conducting tests, and post-processing experimental data are both costly and time-consuming. A reliable numerical model that matches experimental results can help avoid these issues. Using commercial ABAQUS explicit finite element software, we have developed numerical models that accurately replicate experimental outcomes while significantly reducing computation time. In this paper, we examine mesh convergence to ensure the precision and reliability of our numerical models. We detail the progression from a full model (FM) to a reduced model with infinite elements (RM-WIE) and its quarter version (QM-WIE). For non-reflective boundary conditions in the Split Hopkinson Pressure Bar (SHPB) tests, we used CIN3D8 infinite elements in the RM-WIE and QM-WIE models. This approach yields substantial time savings without sacrificing accuracy, reducing computation time from over 22 minutes for the full model to 15 minutes for RM-WIE and 11 minutes for QM-WIE. Moreover, our validation efforts demonstrate a strong numerical-experimental correlation of SHPB global parameters for E-Glass/Epoxy composites across four distinct lay-up configurations: [0°]40, [±30°]20, [±45°]20, and [90°]40, with an error margin of less than 10 %. This validation not only highlights the effectiveness of our numerical models but also underscores their utility in expediting the design process of E-Glass/Epoxy composites, offering a reliable and cost-effective alternative to traditional experimental testing methodologies.