Characterization Of Strain Hardening Three Dimensional Crack-Tip Stress Field
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Date
2022-07-24
Authors
Zakaria, Muhammad Naim
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Conventional structural integrity assessments capable in providing an
estimation of failures but the assessment are mainly two dimensional problem that
limited to two dimensional solution. Most of the problem in real world are based on
the three dimensional problem. Although there are assessment and solution to the three
dimensional fields, the characterization in three dimensional problem is still lacking.
the present research, therefore, motivated to further assess effect of strain hardening to
crack-tip field and to assess the nature of crack-tip constraint loss in fracture problem.
Elastic perfectly-plastic three dimensional crack-tip field have been examined
using Finite Element Analysis (FEA) through Compact Tension (CT) specimen. The
effect of strain hardening were observes as the increases in the strain hardening
exponent will decreases the stress. Out-of-plane constraint in CT specimen were
observed lost from mid-plane to free surface.
Therefore, it can be conclude that the out-of-plane constraint is lost when
moving towards free surface. This, There is more area to be research to reduce the
conservatism of two dimensional approach.