Numerical Simulation for Bar Straightness Effect in Split Hopkinson Pressure Bar

被引：10

作者：

Afdhal ^{[1
]}

Gunawan, Leonardo ^{[1
]}

Kariem, M. A. ^{[2
]}

Dirgantara, Tatacipta ^{[1
]}

Putra, I. S. ^{[1
]}

机构：

[1] Inst Teknol Bandung, Fac Mech & Aerosp Engn, Lightweight Struct Res Grp, Ganesha 10, Bandung 40132, Indonesia

[2] Inst Teknol Bandung, Fac Mech & Aerosp Engn, Mech Design Res Grp, Ganesha 10, Bandung 40132, Indonesia

来源：

PLASTICITY AND IMPACT MECHANICS | 2017年 / 173卷

关键词：

non-straightness bar; numerical simulation; dome shape specimen surface;

D O I：

10.1016/j.proeng.2016.12.116

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bars alignment in a Split Hopkinson Pressure Bar influences the quality of signal recorded during experiments, and thus affects the data of material properties being measured. There are some parameters directly related to the bars alignment such as their straightness, the impact face parallelism, and the neutral axis offset. This paper presents the study on the effects of non-straightness of an SHPB bar systems, dome shaped specimen, and striker bar to incident bar offset using numerical simulations. The bar component is made of AISI 4340 material with 10 mm diameter and 1000 mm length. The non-straightness of the bars and dome shaped specimen which occured due to the limitation of manufacturing process and availability of material, were measured by using dial gauges with ring supports in every 100 mm. First the simulation of an SHPB using ideal bar geometries were carried out. The simulations were then repeated by incorporating bar straightness, specimen surface, and striker bar to incident bar offset in the numerical model. From the comparisons of the material properties obtained from all simulations, it can be concluded that dome shaped specimen is the most affecting factor to the results of the SHPB measurement.. (C) 2017 The Authors. Published by Elsevier Ltd.

引用

页码：615 / 622

页数：8

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