34.5 Summary This paper describes a heating system for high temperature high strain rate tension testing of sheet metals. In this system, the specimen is heated by passing low voltage high amperage DC current through the sample. The sample is heated very rapidly, and typical test temperatures in the range of 600 C. . .800 C are reached in less than a second, and even the melting temperature of the material is reached in less than 2 s. The rapid heating enables fixing of the sample to the stress bars using cyanoacrylate based glue. All operations and timings of the heating system are controlled by the same computer that controls the tension Hopkinson Split Bar Device. The results obtained with the current high temperature system show mild oscillations in the tests performed at room temperature, but at higher temperatures the results are essentially oscillation free. Acknowledgment This work was partly supported by the FIMECC Ltd. (Finnish Metals and Engineering Competence Cluster) Demanding Applications Research Program. References 1. Hokka M, Curtze S, Kuokkala V-T (2007) Tensile testing of sheet steels at different temperatures. In: Proceedings of the annual SEM conference and exposition 2. Ga´lvez F, Erice B (2014) A coupled elastoplastic-damage constitutive model with Lode angle dependent failure criterion. Int J Solids Struct 51:93–110 3. Ga´lvez F, Cendo´n D, Enfedaque A, Sa´nches-Ga´lvez V (2006) High strain rate and high temperature behavior of metallic materials for jet engine turbine containment. J Phys IV 134:269–274 4. Clausen AH, Auestad T, Berstad T, Borvik T, Langset M (2006) High temperature tests on aluminum in a split-Hopkinson bar – experimental set-up and numerical predictions. J Phys IV 134:603–608 5. Macdougal D (1998) A radiant heating method performing high-temperature high-strain-rate tests. Meas Sci Technol 9:1657–1662 6. Loctite 480™(2006) Technical Data sheet 7. Gorham D (1983) J Phys E Sci Instrum 16:477 Fig. 34.6 Stress vs. strain curves of the stainless steel sheet (EN1.4521) in the transverse direction obtained at different strain rates and temperatures 34 High Temperature Tension HSB Device Based on Direct Electrical Heating 233
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