Finite Element Modeling of ASTM E8 Tensile Testing Using Numerical and Experimental Approaches.

Abstract

Tensile testing is one of the important tests carried out to determine the characteristics and mechanical properties of a material. Through tensile tests, various important parameters can be found that describe the behavior of the material when a load is applied. The approach to materials through tensile testing has so far been carried out experimentally, but has not been able to provide precise data values beyond the standard values of yield stress, optimum stress and fracture stress. Based on this, this research was carried out to compare the values obtained from experimental and numerical approaches through finite element modeling using the Abaqus dynamic explicit model developed based on the ASTM E8 specimen shape. By adding material properties and experimental plastic stress-strain values as well as load, mesh and boundary conditions, then the finite element model is simulated and analyzed. Through accuracy analysis, the approach model is obtained to be accurate with an error accuracy of <30% where the young modulus value of ST40 steel is 41,046 Gpa, yield stress is 346,010 MPa, ultimate stress is 417,100 MPa. Yield strain 0.06, ultimate strain 0.25. Meanwhile, for numerical testing, the yield stress value was 272,982 MPa, the ultimate stress was 416,766 MPa. Yield strain 0.04, ultimate strain 0.24. In this research it can be concluded that the numerical tensile testing has approached the experimental tensile testing results.