The effect of plasticity on dynamic crack growth across an interface

abstract

• The effect of plasticity on the growth of a crack originating in an elastic solid across an interface and into an elastic-viscoplastic solid is analyzed numerically. The analyses are carried out within a framework where the continuum is characterized by two constitutive relations; one relating the stress and strain in the bulk material and the other relating the traction and separation across a specified set of cohesive surfaces. Crack initiation, crack growth and crack arrest arise naturally as a consequence of the imposed loading, without a priori assumptions concerning criteria for crack growth and for crack path selection. Full transient analyses are carried out. Various values of initial flow strength and cohesive strength of the elastic-viscoplastic solid and of cohesive strength of the interface are considered. With the ratio of cohesive strength of the elastic-viscoplastic solid to cohesive strength of the interface fixed, increasing the ratio of cohesive strength to initial flow strength for the elastic-viscoplastic solid is found to promote crack deflection into the interface.

authors

• Needleman, Alan

published proceedings

• INTERNATIONAL JOURNAL OF FRACTURE

author list (cited authors)

• Arata, J., & Needleman, A.

citation count

• 16

complete list of authors

• Arata, JJM||Needleman, A

publication date

• December 1998

publisher

• Springer Nature  Publisher

published in

• INTERNATIONAL JOURNAL OF FRACTURE  Journal

keywords

• Dynamic Fracture
• Interface Crack Growth
• Plasticity

Digital Object Identifier (DOI)

• 10.1023/A:1007538925787

start page

• 383

end page

• 399

volume

• 94

issue

• 4

URL

• http%3A%2F%2Fdx.doi.org%2F10.1023%2Fa%3A1007538925787