Open AccessEffective shear modulus in shock-compressed aluminum
Author(s) -
Yuying Yu,
Hua Tan,
Hu Jian-Bo,
Chenwei Dai,
Danian Chen,
Huanran Wang
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.2352
Subject(s) - shear modulus , materials science , bulk modulus , elastic modulus , shear (geology) , modulus , composite material , shear stress , shock (circulatory) , mechanics , physics , medicine
A method to determine the effective shear modulus under shock loading conditions by using longitudinal and bulk sound velocities along the quasi-elastic release was introduced in present paper. The effective shear modulus was calculated for LY12 aluminum over shock pressures range of 20—70 GPa. Results show that the effective shear modulus decreases linearly with the stress, reaching to zero at the reverse yield point, and the effective shear modulus at first release can be depicted by the modified Steinberg-Cochran-Guinan model. Using the effective shear modulus data, simulation has been successful in reproducing the experimental data with quasi-elastic release behavior, showing smooth transition from elastic wave to fully plastic wave.