Determination of temperature rise during high strain rate deformation

Kapoor, R.; Nemat‐Nasser, Sia

doi:10.1016/s0167-6636(97)00036-7

Cited by 451 publications

(158 citation statements)

References 8 publications

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“…Ti has a hexagonal closed packed structure and plastic deformation in the material is limited. It is possible that after the initial plastic deformation, the remainder of the impact stress is converted to heat and no further work hardening takes place [21,[39][40][41][42]. For both spherical and nonspherical coatings, the true hardness was nearly constant over all deposition conditions with the averages being H o = 2.85 ± 0.23 GPa for spherical coatings and H o = 3.25 ± 0.28 GPa for non-spherical coatings.…”

Section: Nanoindentation Size Effect On Hardnessmentioning

confidence: 99%

Mechanical behavior of Ti cold spray coatings determined by a multi-scale indentation method

Goldbaum

Ajaja

Chromik

et al. 2011

Materials Science and Engineering: A

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Section: Nanoindentation Size Effect On Hardnessmentioning

confidence: 99%

Mechanical behavior of Ti cold spray coatings determined by a multi-scale indentation method

Goldbaum

Ajaja

Chromik

et al. 2011

Materials Science and Engineering: A

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“…It has been shown that nearly all plastic work during SHPB testing is converted into heat [44] and corrections for adiabatic heating in aluminum can be significant at high strains [45]. The adiabatic temperature rise at 5% strain for the 10A material, however, is estimated to be less than 5 K. The other materials have lower flow stresses, thus adiabatic heating is less still.…”

Section: Mechanical Testingmentioning

confidence: 99%

Quasistatic and dynamic compression of aluminum-oxide particle reinforced pure aluminum

Marchi

Cao

Kouzeli

et al. 2002

Materials Science and Engineering: A

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Pure aluminum matrix composites reinforced with 40 Á/55 vol.% Al 2 O 3 particles of various sizes (5, 10, 29, and 58 mm) are produced by gas-pressure infiltration. Comparison of compressive flow stresses of these composites at quasistatic and dynamic strain rates shows that, in accord with the literature, the increase in flow stress of dynamically compressed composites results from the sensitivity of the matrix to strain rate. The accumulation of damage in the composites is quantified through high-precision density measurements. Damage accumulates primarily as a function of strain due to particle cracking followed by separation of the broken-particle segments and, to a lesser extent, by matrix cavitation. Composites reinforced by smaller particles have a higher flow stress, lower strain-rate sensitivity, and accumulate less damage, while a greater concentration of reinforcement increases the flow stress, strain-rate sensitivity, and the rate of damage accumulation. #

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“…for taking into account the thermomechanical coupling under adiabatic conditions without solving the thermal problem, the inelastic heat fraction remains an important subject of investigation, the accuracy of temperature measurement increasing thanks to the improvement of the relevant devices. In this context, some experimental determination of heating during plastic deformation at various strain rates tends to prove the dependence of the inelastic heat fraction on strain, strain rate and temperature [Chrysochoos et al 1989;Kapoor and Nemat-Nasser 1998;Oliferuk et al 2004]. Theoretical analyses [Aravas et al 1990;Zehnder 1991] devoted to the subject agree with the tendency mentioned above but qualitative results appear contradictory [Mason et al 1994] depending on the basic concepts used.…”

Section: Introductionmentioning

confidence: 81%

Inelastic heat fraction evaluation for engineering problems involving dynamic plastic localization phenomena

Longère

Dragon²

2009

J. Mech. Mater. Struct.

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The evaluation of the temperature produced during adiabatic dissipative processes for a large class of engineering materials (metals and some polymers) remains a major subject of interest, notably in the fields of high-speed machining and impact dynamics. The hypothesis consisting in considering the proportion of plastic work dissipated as heat (quantified by the inelastic heat fraction β) as independent on the loading path is now recognized as highly simplistic. Experimental investigations have shown indeed the dependence of the inelastic heat fraction on strain, strain rate and the temperature itself. The theoretical studies available nowadays are not entirely conclusive on various features regarding the history dependence and the evolution of β. The present work attempts to provide a systematic approach to the temperature rise and the inelastic heat fraction evolution for a general loading within the framework of thermoelastic/viscoplastic standard modelling including a number of quantitative variants regarding strain hardening/thermal softening and thermomechanical coupling description. The theoretical results thus obtained are confronted with experimental data from the literature. An analysis of the effects of various model simplifications on the evaluation of temperature growth with regard to conditions for dynamic plastic localization occurrence is also carried out. It is shown that the value of critical shear strain at localization incipience is strongly dependent on the level of simplification admitted.

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Determination of temperature rise during high strain rate deformation

Cited by 451 publications

References 8 publications

Mechanical behavior of Ti cold spray coatings determined by a multi-scale indentation method

Mechanical behavior of Ti cold spray coatings determined by a multi-scale indentation method

Quasistatic and dynamic compression of aluminum-oxide particle reinforced pure aluminum

Inelastic heat fraction evaluation for engineering problems involving dynamic plastic localization phenomena

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