A novel technique for dynamic shear testing of bulk metals with application to 304 austenitic stainless steel
AffiliationENSAM-Arts et Métiers ParisTech, Paris
Lorraine University, France
Institute of Fundamental Technological Research, Warsaw, Poland
Carlos III University, Madrid
University of Derby
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AbstractThis 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 105 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 and Lode angle parameter 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.
CitationJia, B., Rusinek, A., Pesci, R., Bernier, R., Bahi, S. and Wood, P., (2020). 'A novel technique for dynamic shear testing of bulk metals with application to 304 austenitic stainless steel'. International Journal of Solids and Structures, 204, pp. 153-171.
JournalInternational Journal of Solids and Structures
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