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Plastic Deformation and Fracture of Steels Under Dynamic Biaxial Loading.

DE200515014424

Publication Date	2004
Personal Author	Syn, C. K.; Moreno, J.; Goto, D. M.; Belak, J.; Grady, D.
Page Count	14
Abstract	Dynamic equi-biaxial bulging of thin AerMet 100 alloy plates was studied. The plates were deformed using a gas-gun driven flyer plate test set-up at impact velocities between 1.0 and 2.0 km/sec. The results indicate that in addition to biaxial stretching (and thinning) of the plate, internal cavitation (spallation fracture) results from the complex wave interactions within the plate. No outward evidence of damage was observed at the lower velocities, in the range of 1.0- 1.2 km/sec. Fine scale cracking of the plates was observed at impact velocity above approximately 1.4 km/sec. Complete specimen fracture, in the form of multiple petals and pieshaped fragments, was observed at impact velocity above 1.6 km/sec. Hydrodynamic computer code simulations were performed, prior to and in conjunction with the experiments, to aid in experiment design and interpretation of the experimental data.
Keywords	Metals Alloy steels Biaxial stresses Plastic deformation Cracking (Fracturing) Schematic drawings Axial loads Stresses Deformation Spallation fracture Cavitation Computer codes Hydrodynamics
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200523

Plastic Deformation and Fracture of Steels Under Dynamic Biaxial Loading.

Plastic Deformation and Fracture of Steels Under Dynamic Biaxial Loading.
DE200515014424

Publication Date	2004
Personal Author	Syn, C. K.; Moreno, J.; Goto, D. M.; Belak, J.; Grady, D.
Page Count	14
Abstract	Dynamic equi-biaxial bulging of thin AerMet 100 alloy plates was studied. The plates were deformed using a gas-gun driven flyer plate test set-up at impact velocities between 1.0 and 2.0 km/sec. The results indicate that in addition to biaxial stretching (and thinning) of the plate, internal cavitation (spallation fracture) results from the complex wave interactions within the plate. No outward evidence of damage was observed at the lower velocities, in the range of 1.0- 1.2 km/sec. Fine scale cracking of the plates was observed at impact velocity above approximately 1.4 km/sec. Complete specimen fracture, in the form of multiple petals and pieshaped fragments, was observed at impact velocity above 1.6 km/sec. Hydrodynamic computer code simulations were performed, prior to and in conjunction with the experiments, to aid in experiment design and interpretation of the experimental data.
Keywords	Metals Alloy steels Biaxial stresses Plastic deformation Cracking (Fracturing) Schematic drawings Axial loads Stresses Deformation Spallation fracture Cavitation Computer codes Hydrodynamics
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Livermore National Lab., CA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200523