Fracture mechanics and local approach analyses are carried out on copper alloy to stainless steel joints produced by hot isostatic pressing (HIP) and respective base materials. Experiments are performed with fatigue precracked miniature single-edge notched bend (SENB) specimens at room and elevated temperatures in order to investigate the combined effects of linear and nonlinear mismatch on the fracture resistance of a bimaterial metallic interface. Characterization of near crack tip conditions is executed by applying local approach by porous metal plasticity with the modified Gurson model. Numerical results were interpreted with respect to scaling of the J-integral and the rates of damage accumulation as dependent on differences in material properties. The increase of nonlinear mismatch was found to severily augment the damage rates at near crack tip regions and to enforce the experimentally observed decreases of fracture resistance.
|Title of host publication||Advances in Mechanical Behaviour, Plasticity and Damage|
|Subtitle of host publication||proceedings of Euromat 2000|
|Editors||D. Miannay, P. Costa, D. Francois, A. Pineau|
|Place of Publication||Amsterdam|
|Pages||103 - 108|
|Publication status||Published - 2000|
|MoE publication type||B3 Non-refereed article in conference proceedings|
|Event||European Conference Euromat on Advances in Mechanical Behaviour, Plasticity and Damage, Euromat 2000: Euromat Topical - Tours, France|
Duration: 7 Nov 2000 → 9 Nov 2000
|Conference||European Conference Euromat on Advances in Mechanical Behaviour, Plasticity and Damage, Euromat 2000|
|Period||7/11/00 → 9/11/00|
Laukkanen, A., & Tähtinen, S. (2000). Implications of nonlinear mismatch in fracture of bimetallic interfaces. In D. Miannay, P. Costa, D. Francois, & A. Pineau (Eds.), Advances in Mechanical Behaviour, Plasticity and Damage: proceedings of Euromat 2000 (Vol. 1, pp. 103 - 108). Elsevier.