Journal
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
Volume 204, Issue -, Pages 153-171Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2020.08.019
Keywords
Single-shear specimen; Dynamic strain rate; Simple shear; Finite element modeling; Correction coefficient method
Categories
Funding
- China Scholarship Council (CSC) [201606220056]
Ask authors/readers for more resources
This paper describes a new single-shear specimen (SSS) and method to characterize the dynamic shear behavior of bulk metals using a traditional Split Hopkinson Pressure Bar (SHPB). By this method, the shear behavior of materials can be tested conveniently over a wide range of strain rates within 10(5) s(-1) . This technique was applied to a 304 austenitic stainless steel (ASS) under shear strain rates from 0.001 s(-1) to 38700 s(-1) at room temperature. Based on finite element (FE) simulations, it was found that the deformation of the specimen shear zone was dominated by shear stress/strain components. Stress state parameters represented by stress triaxiality eta and Lode angle parameter (theta) over bar were found very close to zero, indicating a deformation mode of simple shear. Besides, an obvious gap existed between the local deformation behavior in the specimen shear zone and the macroscopic stress-strain relations measured by the strain gauges on the SHPB bars. A correction coefficient method was adopted to extract the real shear behavior from the experimentally obtained force-displacement data. Through comparisons between the tested and simulated stress-strain curves, a good agreement was obtained. (C) 2020 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available