In this work, an embedded cohesive elements (ECE) approach has been developed in order to account for the energy dissipated in the separation of the fracture surfaces during spall in flyer plate impact test. The ECE method consists in embedding cohesive elements capable to sustain only normal and shear forces into standard isoparametric 2D or 3D FEM continuum elements. The cohesive elements remain silent and inactive until the underlying continuum elements fail. At failure, the continuum elements are removed while the embedded cohesive elements become active until the energy of fracture separation is fully dissipated. In this work, the methodology is presented and applied to simulate soft spall in ductile metals such as 99.99% copper
EMBEDDED COHESIVE ELEMENTS (ECE) APPROACH TO THE SIMULATION OF SPALL FRACTURE EXPERIMENT
BONORA, Nicola;RUGGIERO, Andrew
2007-01-01
Abstract
In this work, an embedded cohesive elements (ECE) approach has been developed in order to account for the energy dissipated in the separation of the fracture surfaces during spall in flyer plate impact test. The ECE method consists in embedding cohesive elements capable to sustain only normal and shear forces into standard isoparametric 2D or 3D FEM continuum elements. The cohesive elements remain silent and inactive until the underlying continuum elements fail. At failure, the continuum elements are removed while the embedded cohesive elements become active until the energy of fracture separation is fully dissipated. In this work, the methodology is presented and applied to simulate soft spall in ductile metals such as 99.99% copperI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
