Experimental and computational study of ductile fracture in small punch tests
Date
2017-08-24
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
A unified experimental-computational study on ductile fracture initiation and propagation during small punch testing is presented. Tests are carried out at room temperature with unnotched disks of different thicknesses where large-scale yielding prevails. In thinner specimens, the fracture occurs with severe necking under membrane tension, whereas for thicker ones a through thickness shearing mode prevails changing the crack orientation relative to the loading direction. Computational studies involve finite element simulations using a shear modified Gurson-Tvergaard-Needleman porous plasticity model with an integral-type nonlocal formulation. The predicted punch load-displacement curves and deformed profiles are in good agreement with the experimental results.
Description
Keywords
Chemistry, Materials science, Metallurgy & metallurgical engineering, Physics, Ductile fracture, Gurson's plasticity model, Nonlocal plasticity, P91 steel, Small punch test, Scale yielding conditions, Crack-growth, Nonlocal damage, Void nucleation, Neural-networks, P91 weldment, Deformation, Toughness, Failure, Bone cement, Finite element method, Fracture, Fracture testing, Materials testing, Metallic glass, Plasticity, Ductile fracture initiation, Finite element simulations, Load-displacement curve, Non-local plasticity, Nonlocal formulations, Ductile fracture, Plasticity model, Shear
Citation
Çakan, B. G. vd. (2017). ''Experimental and computational study of ductile fracture in small punch tests''. Materials, 10(10).