A Review of Composite Material Models for Sandwich Structures under Soft Body Impact in LS-DYNA

Author(s)	Mr. Mandeep Singh, Dr. AC Niranjanappa, Prof. B Durga Prasad
Country	India
Abstract	Composite structures, particularly sandwich composites, are increasingly used in impact-critical applications due to their high energy absorption and specific strength. Numerical modeling using LS-DYNA requires accurate material models to simulate soft body impacts and post-failure behavior. This paper presents a comparative evaluation of LS-DYNA composite material models such as MAT_054, MAT_058, MAT_158, and MAT_162. Special emphasis is placed on MAT_158 for modeling foam-core sandwich composites. Theoretical background, simulation setup, validation with experimental data, and post-impact results are discussed. Results show that MAT_158 effectively captures the nonlinear crush behavior of foam cores with good agreement to experimental benchmarks.
Keywords	Composite Materials, Sandwich Structures, LS-DYNA, Soft Body Impact, Material Models, MAT_158, MAT_054, Damage Modeling, Foam Core Simulation
Field	Engineering
Published In	Volume 7, Issue 3, May-June 2025
Published On	2025-06-25
DOI	https://doi.org/10.36948/ijfmr.2025.v07i03.49308
Short DOI	https://doi.org/g9rj27

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