EFFECTS OF NONLOCAL DAMAGE IN POROUS PLASTIC SOLIDS Academic Article

abstract

• A nonlocal constitutive formulation for a porous ductile material is investigated, in which delocalization relates to the damage mechanism. An elastic-viscoplastic material model is used, with delocalization incorporated in terms of an integral condition on the rate of increase of the void volume fraction. Two model problems are analysed to study the effect of including this material length, one relates to localization of plastic flow in shear bands, while the other considers a metal matrix composite. Both model problems involve final failure in strongly nonhomogeneous strain fields, and it is shown that the inherent mesh sensitivity of the numerical failure predictions can be removed by using the nonlocal material model considered here. 1995.

authors

• Needleman, Alan

published proceedings

• INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

author list (cited authors)

• TVERGAARD, V., & NEEDLEMAN, A.

citation count

• 206

complete list of authors

• TVERGAARD, V||NEEDLEMAN, A

publication date

• April 1995

publisher

• Elsevier  Publisher

published in

• International Journal of Solids and Structures  Journal

keywords

• 40 Engineering
• 4005 Civil Engineering

Digital Object Identifier (DOI)

• 10.1016/0020-7683(94)00185-Y

start page

• 1063

end page

• 1077

volume

• 32

issue

• 8-9

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2F0020-7683%2894%2900185-y