Experimental and Computational Study of Ductile Fracture in Small Punch Tests
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. For thinner specimens
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.
GULCIMEN Betul;
SOYARSLAN Celal;
BARGMANN Swantje;
HAEHNER Peter;
2017-10-25
MDPI AG
JRC107716
1996-1944,
https://www.mdpi.com/1996-1944/10/10/1185,
https://publications.jrc.ec.europa.eu/repository/handle/JRC107716,
10.3390/ma10101185,
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