Dependence of the critical stresses on the loading time parameters during spall in copper, aluminum, and steel

Romanchenko, V. I.; Степанов, Г. В.

doi:10.1007/bf00916495

Cited by 60 publications

(18 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conversely, the characteristic dynamic stress and density increase with the stress rate, thereby leading to higher stress levels and activated site densities. This qualitative trends are in agreement with experimental observations concerning brittle materials (Brara et al, 2001;Forquin and Hild, 2010) and ductile materials (Romanchenko and Stepanov, 1980;Meyers and Aimone, 1983;Kanel et al, 1997;Thomason, 1999;Czarnota et al, 2006).…”

Section: Dynamic Loadingsupporting

confidence: 81%

On characteristic parameters involved in dynamic fragmentation processes

Hild

2015

Mechanics of Materials

View full text Add to dashboard Cite

Dynamic loadings produce high stress waves leading to the fragmentation of brittle materials such as ceramics, concrete, glass, and rocks, or ductile materials such as steels and alloys. The main mechanism used herein to explain the change of the number of fragments with strain and stress rates is an obscuration (or shielding) phenomenon associated with cracking or cavitation.A probabilistic framework, which is based upon a Poisson point process, is introduced. Nonlocal (in space and time) expressions are obtained to account for multiple crack initiations or void nucleations, and their subsequent growth. This approach allows characteristic parameters (i.e. size, stress, stress rate, and time) involved in the fragmentation processes to be introduced. Examples are discussed to illustrate the use of these characteristic parameters in the analysis of dynamic fragmentation of brittle materials and spallation of tantalum.

show abstract

Section: Dynamic Loadingsupporting

confidence: 81%

On characteristic parameters involved in dynamic fragmentation processes

Hild

2015

Mechanics of Materials

View full text Add to dashboard Cite

show abstract

“…It must be noticed that in the three cases, the compression is followed by a high tensile stress greater than the characteristic tensile strength of the material. Nevertheless, the loading in tension is not long enough (150 ps) to induce a fracture in the medium 32,33 . The shock duration and intensity provide a good signature of the balance between the electronic diffusion and the electron-ion coupling.…”

Section: Simulations and Analysismentioning

confidence: 99%

Hydrodynamic simulations of metal ablation by femtosecond laser irradiation

et al. 2005

View full text Add to dashboard Cite

Ablation of Cu and Al targets has been performed with 170 fs laser pulses in the intensity range of 10 12 -10 14 W/cm 2 . We compare the measured removal depth with 1D hydrodynamic simulations. The electron-ion temperature decoupling is taken into account using the standard two-temperature model. The influence of the early heat transfer by electronic thermal conduction on hydrodynamic material expansion and mechanical behavior is investigated. A good agreement between experimental and numerical matter ablation rates shows the importance of including solid-to-vapor evolution of the metal in the current modeling of the laser matter interaction.

show abstract

“…However, it has also been pointed out by Romanchenko and Stepanov [21] that the reload part of the signal is attenuated as it travels through the spalled scab, hence the actual spall strength [22], r spall is,…”

Section: Spallmentioning

confidence: 99%

The Behaviour of 2169 Steel Under Uniaxial Stress and Uniaxial Strain Loading

Whiteman

Keightley

Millett

2016

J. dynamic behavior mater.

View full text Add to dashboard Cite

A series of plate impact and uniaxial stress compression experiments have been undertaken on 2169 steel, a nitrogen strengthened austenitic stainless steel. The shock experiments ranged from impact stresses of 3.7-17.8 GPa, recording the wave profiles of the shock and spall behaviour observed at the rear target surfaces. Target and impactor configurations were varied to observe the effects of tensile strain-rates achieved at spall planes. Spall strength was observed to vary linearly with impact stress and tensile strain-rate although was less rate sensitive than 300 series steels suggestive of an influence of the shock induced microstructure on void nucleation. A fourth power relationship between strain-rate in the shock front and shock stress was observed similar to many other materials. The linear coefficient A relating the two is discussed in terms of dislocation mobility. Uniaxial stress compression experiments were undertaken on two grain sizes of the same material at a range of strain-rates from *10 -4 to 10 3 s -1 . The data is consistent with other published data on 2169 steel showing a clear grain-size dependence on flow stress and higher flow stresses than other common austenitic steels.

show abstract

Dependence of the critical stresses on the loading time parameters during spall in copper, aluminum, and steel

Cited by 60 publications

References 8 publications

On characteristic parameters involved in dynamic fragmentation processes

On characteristic parameters involved in dynamic fragmentation processes

Hydrodynamic simulations of metal ablation by femtosecond laser irradiation

The Behaviour of 2169 Steel Under Uniaxial Stress and Uniaxial Strain Loading

Contact Info

Product

Resources

About