<p>Composites are materials with high specific strengths. These materials can be examined in terms of mechanical strength by experimental or finite element methods (FEM). It has been determined in the literature that various material models are used in modeling composite materials by finite element method. In order to model composite materials correctly by FEM, it is very important to determine the material model data (physical and non-physical parameters) correctly. However, there are limited studies in the literature on determining the physical and non-physical parameters used for Ls dyna software material models of materials. For this reason, the material model data of unidirectional glass/epoxy composite material in different temperature environments were determined by FEM (Ls dyna software and MAT 55/MAT 59 material models) in the study. Material model data were determined by comparing the experimental results of composite materials with the results obtained by the FEM. As a result of the study, both material model data were obtained and the effect of the thermal environment on the material model data was investigated. It was determined that the material model data also changed with the change of ambient temperatures. Moreover, it was determined that the MAT 59 material model gave better results.</p> Graphical abstract <p></p>