Date of Award
Master of Applied Science (MASc)
In this study, detailed numerical works are carried out to investigate cladding
and superimposed hydrostatic pressure on fracture in metals under tension by using
finite element software ABAQUS/Explicit. It is concluded that both cladding and
superimposed hydrostatic pressure delay void nucleation and void growth, which
results in increasing fracture strain in metals under tension.
The influence of cladding on delaying fracture in metals under tension is
numerically studied by employing Gurson-Tvergaard-Needleman (GTN) damage
model. It is found that cladding has a significant effect on enhancement in materials'
ductility due to the fact that cladding increases necking strain which in tum delays the
void nucleation and growth. Topological arrangement of cladding in axisymmetric
tensile round bars shows no noticeable effect on necking but significantly affects
The influence of superimposed hydrostatic pressure is numerically
investigated on sheet metals under plane strain tension by using GTN damage model.
It is found that superimposed hydrostatic pressure has no noticeable effect on necking
but significantly delays fracture initiation due to the fact that superimposed
hydrostatic pressure delays or completely eliminates the nucleation, growth and
coalescence of microvoids or microcracks.
Chen, Xiaoxian, "Numerical simulation of effects of cladding and superimposed hydrostatic pressure on fracture in metals under tension." (2009). Open Access Dissertations and Theses. Paper 4130.
McMaster University Library