A new technique for heating specimens in split-Hopkinson-bar experiments using induction-coil heaters

An extended mechanical threshold stress plasticity model: modeling 6061-T6 aluminum alloy

“…The slope θ is then plotted against 1 − (σ e /σ e s) 2 and a straight line with zero intercept is fitted to the resulting curve. This model gives a better fit to the experimental data that the more commonly used hyperbolic tangent hardening rule [Follansbee and Kocks 1988 [Green and Babcock 1966;Eleiche 1972]; [Davidson 1973]; [Rosenberg et al 1986]; [Yadav et al 1995 Banerjee 2007]. The slope of the straight line fit gives us the value of θ 0 for each curve.…”

“…We assume that the strain rate dependence of these quantities is negligible for aluminum alloys and only consider temperature dependence. Based on the experimental observation that the temperature dependence of the flow stress of aluminum alloys follows a sigmoidal curve [Rosenberg et al 1986], we assume that I 2 and ρ f s have the following temperature dependence:…”

“…[Green and Babcock 1966;Eleiche 1972]; [Davidson 1973]; [Rosenberg et al 1986]; [Yadav et al 1995]; [Brown et al 1996]; × [Lee et al 2000]; * [Ogawa 2001]; [Cady and Gray III 2001;Fish et al 2005]; + [Lesuer et al 2001;Jia and Ramesh 2004].…”

“…Adiabatic heat is assumed for the high strain rate calculations. [Green and Babcock 1966;Eleiche 1972]; [Dike et al 1997]; [Rosenberg et al 1986]; [Ogawa 2001]. …”

Celebrating 75 Years of the Society for Experimental Mechanics and the Study of Dynamic Behavior of Materials

“…Building on the society's history in photoelastic coatings and full field methods there have been expansive studies into dynamic fracture mechanics, such as [19][20][21][22][23][24][25]. SEM members have contributed significantly to advances in the Split Hopkinson Pressure Bar (SHPB) or Kolsky Bar technique [6], expanding it's loading range, analysis, and material applicability [25][26][27][28][29][30], methods have been developed for heating specimens [31], and moving from strain gages to embedded quartz force transducers [32,33]. The SHPB has been expanded into tensile loading [34][35][36][37] including 3D full field strain measurements [38], shear loading through both torsion bars [39] and specimen design [40], fracture [41], and dynamic friction measurements [42].…”