Material characterization and constitutive modelling of ductile high strength steel for a wide range of strain rates

Rohr, I.; Nahme, H.; Thoma, Klaus

doi:10.1016/j.ijimpeng.2004.02.005

Cited by 65 publications

(47 citation statements)

References 15 publications

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“…These have the advantages that they are contact free without any mechanical influence on the specimen and that they can measure continuously a Corresponding author: frank.bagusat@emi.fraunhofer.de with high time resolution. At the EMI a free beam VISAR (velocity interferometer system for any reflector [6][7][8][9][10]) system is used [11][12][13][14][15][16], but in principle also fiber based VISAR setups are known to be used [4,[17][18][19] in connection with inverted Taylor test experiments.…”

Section: The Modified Taylor-test (Mtt)mentioning

confidence: 99%

“…This system has a mass of about 450 g. Impacting a static specimen by a sabot driven projectile with sufficient high velocity will cause elasto-plastic wave processes in the specimen (a slower plastic and a faster elastic wave). If the elastic wave is reaching the rear side of the specimen, this side is accelerated; this acceleration can be observed by a VISAR [12][13][14]. It is assumed that the acceleration process causes a load of the specimen's material so that it reaches the yield point.…”

Section: The Modified Taylor-test (Mtt)mentioning

confidence: 99%

“…It has been discussed elsewhere which kind of dynamic material properties can be derived from free surface velocity time curves [12][13][14]. Therefore, only the formulas are summarized here.…”

Section: Dynamic Materials Properties Derived From Mtt Investigationsmentioning

confidence: 99%

“…MTTs as one element for a strain rate dependent yield stress characterization MTT specimen made of a high strength steel with a size of 6 mm diameter and 60 mm length were used in an extended investigation collecting yield stress data determined by various testing methods [12,14]. One result of this measurement program was a yield stress-strain rate dependency depicted in Fig.…”

Section: Examples Of Mtt Investigationsmentioning

confidence: 99%

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The role of the modified taylor impact test in dynamic material research

Bagusat

Rohr

2015

EPJ Web of Conferences

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Abstract. Dynamic material research with strain rates of more than 1000 1/s is experimentally very often done with a SplitHopkinson Bar, Taylor impact tests or planar plate impact test investigations. At the Ernst-Mach-Institut (EMI), a variant of an inverted classical Taylor impact test is used by application of velocity interferometers of the VISAR type ("Modified Taylor Impact Test", MTT). The conduction of the experiments is similar to that of planar plate impact tests. The data reduction and derivation of dynamic material data can also be restricted to an analysis of the VISAR signal. Due to these properties, nearly each highly dynamic material characterization in our institute done by planar plate investigations is usually accompanied by MTT experiments. The extended possibilities and usefulness of a combined usage of these two highly dynamic characterization methods are explained. Recently, further developed MTT experiments with very small specimen sizes are presented. For the first time, Taylor impact and planar impact specimen can be used for which the load directions even in case of thin plate test material are identical and not perpendicular to each other. Consequences for testing construction elements are discussed.

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Section: The Modified Taylor-test (Mtt)mentioning

confidence: 99%

Section: The Modified Taylor-test (Mtt)mentioning

confidence: 99%

Section: Dynamic Materials Properties Derived From Mtt Investigationsmentioning

confidence: 99%

Section: Examples Of Mtt Investigationsmentioning

confidence: 99%

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The role of the modified taylor impact test in dynamic material research

Bagusat

Rohr

2015

EPJ Web of Conferences

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“…Later, He et al [3] carried out compression tests with eutectoid steel wires at high strain rates to provide data for the numerical modelling of the processing of wires fabricated under high-speed cold-drawing conditions. More recently, Rohr et al [4] presented the results of a research programme aimed at describing the behaviour of a high-strength steel alloy (35 NiCrMoV109) overa wide range of stain rates for numerical simulations of dynamic events and developed a phenomenological material model for this purpose. More recently, the influence of temperature on the performance of steel wires for prestressing was reported in a paper published by Atienza et al [5].…”

Section: Introductionmentioning

confidence: 99%

Behaviour of steel prestressing wires under extreme conditions of strain rate and temperature

Gálvez

Atienza

Calafat

2011

Structural Concrete

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Experimental study on mechanical properties of corroded steel fibers under static and dynamic loading

Chen

Wang

2017

Materials & Corrosion

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The influences of corrosion and the strain rate on the mechanical performance of corroded steel fibers were assessed in this paper. The steel fibers were corroded to different corrosion degrees by drying‐wetting cycling in a 5% sodium chloride solution and a 50° centigrade oven. The static and dynamic tensile tests of corroded steel fibers were investigated by using a static and dynamic test system. The results showed that the mechanical properties of the corroded steel fibers were strain‐rate dependent. With an increase in strain rate, the ultimate load increased, whereas, the strain‐rate effect decreased with an increase in the corrosion degree. However, variations in Young's modulus with strain rate and corrosion degree were not obvious. With an increase in the corrosion degree, both the nominal tensile strength and elongation of the corroded steel fibers decreased. However, the ultimate strength based on the minimum cross‐sectional area did not decrease. The strength could be attributed to the uneven distribution of the cross‐sectional area along the bar. Based on the experimental results, a time‐dependent assessment method for the mechanical behavior of corroded steel fibers under the static and dynamic loading conditions was proposed.

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Material characterization and constitutive modelling of ductile high strength steel for a wide range of strain rates

Cited by 65 publications

References 15 publications

The role of the modified taylor impact test in dynamic material research

The role of the modified taylor impact test in dynamic material research

Behaviour of steel prestressing wires under extreme conditions of strain rate and temperature

Experimental study on mechanical properties of corroded steel fibers under static and dynamic loading

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