Comparison of plasticity models for tantalum and a modification of the PTW model for wide ranges of strain, strain rate, and temperature

Kim, Jong-Bong; Shin, Hyunho

doi:10.1016/j.ijimpeng.2008.11.003

Cited by 36 publications

(17 citation statements)

References 12 publications

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“…In formulating the new model and presenting results here, attention is paid to integrated experimental observations that probe strength response at the elevated strain rates where a previous version of the model has generally been successful in predicting experimental data [Barton et There is significant ongoing interest in the development of constitutive models for high rate, pressure, and temperature deformation of solids 2,3 and in comparisons of the responses of such models. 4 New types of experiments are being deployed as are new approaches to the analysis of experiments. [5][6][7][8][9][10] References here are provided as examples and are not meant to be exhaustive or even fully representative of the breadth of work being performed.…”

mentioning

confidence: 99%

A multiscale strength model for tantalum over an extended range of strain rates

Barton

Rhee

2013

Journal of Applied Physics

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confidence: 99%

A multiscale strength model for tantalum over an extended range of strain rates

Barton

Rhee

2013

Journal of Applied Physics

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“…where is the atomic mass.. The model has been employed for wider ranges of strain rates and temperatures and obtained good correlation between predictions and experimental data for wide ranges of strain rates and temperatures by modifying the strain-hardening term in the original PTW model using the Voce equation [58].…”

Section: Other Constitutive Modelsmentioning

confidence: 98%

“…and (58) where , and are stress, plastic strain and strain rate, respectively, is the temperature increment in respect to room temperature ( and , , , are constants to be determined. is a thermal softening coefficient to be determined assuming adiabatic conditions during deformation.…”

Section: Mechanical Threshold Stress (Mts)mentioning

confidence: 99%

A review on the strain rate dependency of the dynamic viscoplastic response of FCC metals

Salvado

Teixeira-Dias

Walley

et al. 2017

Progress in Materials Science

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The response of structures and materials subject to impulsive loads remains a field of intense research. The dynamic loading and temperature increase affect the material's mechanical/failure response. For example, strains due to explosive blast will increase at rates from 102 to 104 s-1, leading to regimes of elastic/plastic wave propagation, plane stress and adiabatic deformations. Few constitutive models consider high strain rate effects, however some constitutive approaches that were developed and tested at low strain rate regimes will also be addressed here due to their relevance. Specific reference will be made to strain rate regimes close to 104 s-1, where shock waves may develop. The paper focuses on constitutive models for polycrystalline face-centred-cubic (FCC) metals since their behaviour under high strain rate regimes is not yet fully understood mostly due to path loading dependency. Reference is also made to aluminium alloys since they are widely used in virtually all fields of industry and in armour and protective structures and systems. A basic review of the main theoretical aspects that constitute the basis for most of the constitutive models described is also presented and the main features of each model are thoroughly discussed.

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“…It was noted by several authors ( Ref 11,12,[14][15][16][17] that this model fails to accurately predict material deformation at strain rates higher than 10 5 s À1 , due to the sharp increase in flow stress at strain rates typically found in Cold Spray. These are often greater than 10 7 s À1 ( Ref 11,14,18), which may explain the limitations of the JC model in successfully describing the particle-substrate behavior and predicting the deformation and adhesion properties.…”

Section: Introductionmentioning

confidence: 98%

Finite Element Analysis and Failure Mode Characterization of Pyramidal Fin Arrays Produced by Masked Cold Gas Dynamic Spray

et al. 2015

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This work evaluates the shear strength of pyramidal fin arrays made from various feedstock materials (cylindrical aluminum, spherical nickel, and cylindrical stainless steel 304 powders) deposited on an Al6061-T6 substrate. Higher shear strength was measured for the nickel fin array followed by the stainless steel 304 and the aluminum arrays. Different failure modes were observed by inspecting the fracture surfaces under Scanning Electron Microscope. Deposition between the cold sprayed nickel and stainless fins was detected whereas dimples were noticed on the substrate between the fins when aluminum is used as the feedstock material. A numerical simulation of normal and angled impacts using the high strain rate Preston-Tonks-Wallace model was carried out in order to have a better understanding of the experimental results. The equivalent plastic strain (PEEQ) obtained from the finite element analysis at normal impact correlates with the different shear strengths measured experimentally. Furthermore, even if a higher PEEQ was observed for angled impacts compared to its normal collision counterpart, it is suggested that the particles may not bond because of the rotational restitution momentum caused by the tangential friction generated during angled impacts. This rotational restitution momentum was not detected for particle impacts normal to the substrate surface.

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Comparison of plasticity models for tantalum and a modification of the PTW model for wide ranges of strain, strain rate, and temperature

Cited by 36 publications

References 12 publications

A multiscale strength model for tantalum over an extended range of strain rates

A multiscale strength model for tantalum over an extended range of strain rates

A review on the strain rate dependency of the dynamic viscoplastic response of FCC metals

Finite Element Analysis and Failure Mode Characterization of Pyramidal Fin Arrays Produced by Masked Cold Gas Dynamic Spray

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