Numerical Study of Three Split-Hopkinson Shear Bar Techniques

• Main Author: Faizah (NIM : 13113143), Iffah
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22490
• Institution: Institut Teknologi Bandung

Split-Hopkinson Shear Bar Testing is a modification of the high rate-impact test of Split-Hopkinson Pressure Bar. SHSB is now growing with a variety of techniques that are hat-shaped, double-notch, and punch. However, these three techniques have different characteristics although using the same test specimen material. <br /> <br /> <br /> The main objective of this study is to determine the best and optimal SHSB technique in determining shear stress-shear strain of a material by numerical analysis of finite element method using Abaqus / CAE® software. <br /> <br /> <br /> The finite element modeling is made up of a quarter solid 3D component for hat-shaped and punch techniques, as well as 3D solid half-sections for double-notch techniques. Used striker bar along 300 mm with an initial speed of 10.915 m / s, incident bar 1200 mm, and transmitted bar 1200 mm, with maraging steel material. For the specimen used material T351-2024 Aluminum (AISI Grade 16Ni) and constitutive material model Johnson-Cook. <br /> <br /> <br /> All three test techniques have differences in specimen shape, incident bar, and transmitted bar dimensions. Based on the numerical simulation results, the maximum shear stress of the hat-shaped technique is 247,66 MPa, the final shear strain 64%, and the strain rate 5162 s-1, the punch technique (&#964; = 181.3 MPa, &#947; = 34 %, &#947; = 5239 s-1), and double-notch technique (&#964; = 250,5 MPa, &#947; = 69%, &#947; = 5470 s-1). The double-notch technique was chosen as the most optimal SHSB technique because it has a slope of strain rate about 4.06 and a force error reach 0%.