Development of material model for assessment of brittle cracking behavior of plexiglas

14th International Symposium on Advanced Materials

Khan, A.J.^1 ; Iqbal, N.^1 ; Saeed, H.A.^1 ; Tarar, W.A.^1

Department of Mechanical Engineering, College of e and Me, National University of Science and Technology, Rawalpindi, Pakistan^1

关键词: Abaqus/explicit;    Cracking behavior;    Force and displacements;    Indentation test;    Load-displacement curve;    Material modeling;    Numerical predictions;    Yielding stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/146/1/012008/pdf
DOI  :  10.1088/1757-899X/146/1/012008

来源: IOP

【 摘 要 】

The objective of this study is to investigate the brittle cracking behavior of Plexiglas material when subjected to indentation loading. Indentation tests were conducted on Modified Vickers testing machine to acquire the experimental data in the form of load-displacement curve. Several mechanical properties such as hardness, yielding stress and fracture toughness have been ascertained from the analysis of the experimental data. The experimental data then used to create a mathematical model of Plexiglas for its brittle cracking behavior with indentation loading. Furthermore, a numerical simulation based study was carried out to simulate the brittle cracking in Plexiglas plate when subjected to indentation loading. The simulations were performed in the FE solver Abaqus. The brittle cracking model in Abaqus/Explicit is used which determines the required force and displacement to produce crack in Plexiglas. Finally a comparison of simulation results was made to the experimental data to validate the FEA procedures and accuracy of predictions. The numerical predictions of load-displacement curve found remarkably consistent with experimental results.