On the dynamic evolution of ductile damage

✍ Scribed by Chen Zengtao

• Publisher: Springer Netherlands
• Year: 1996
• Tongue: English
• Weight: 136 KB
• Volume: 75
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00034080

✦ Synopsis

In recent years a great deal of attention has been paid to the dynamic failure phenomena of materials and structures [1][2][3][4]. Recently, the hollow spherical meso-model for the dynamic evolution of ductile damage, developed by Carroll and Holt [1] and Johnson [2], was introduced in order to investigate the dynamic ductile damage in strain-hardening viscoplastic materials [3,4]. In [3] the porosity of the materials was assumed to be affected merely by the hydrostatic stress component with an assumption that the matrix of the meso-cell is incompressible. However, the deviatoric stress component was introduced in the derivation of the dynamic evolution equation in [4] by means of the energy conservation condition of the meso-cell, accompanying such a contradictory asumption that the microvoid or the spherical cell conserve its spherical shape during the deformation process. So it can be seen that study of the description of the dynamic ductile damage model is still an open problem.