The Bauschinger Effect's Impact on the 3-D Combined SIFs for Radially Cracked Fully or Partially Autofrettaged Thick-Walled Cylinders
M. Perl1, C. Levy 2, V. Rallabhandy 2
University of Canterbury, Christchurch, NZ. On leave from the BenGurion University of the Negev, Beer Sheva, Israel
Florida International University, Miami, FL, USA
The Bauschinger Effect (BE) impact on
KIN– the combined, Mode I, 3-D Stress Intensity Factor
(SIF) distributions for arrays of radial, internal, surface
cracks emanating from the bore of a fully or partially
autofrettaged thick-walled cylinder is investigated.
A in-depth comparison between the combined SIFs for a
“realistic” - Bauschinger Effect Dependent Autofrettage
(BEDA) and those for an “ideal” - Bauschinger Effect
Independent Autofrettage (BEIA) is performed. The 3-
D finite element (FE) analysis is performed employing
the submodeling technique and singular elements along
the crack front. Both autofrettage residual stress fields,
BEDA and BEIA, are simulated using an equivalent temperature
field and more than 1200 different crack configurations
are analyzed. SIFs for numerous crack arrays,
n, a wide range of crack depth to wall thickness ratios,
a/t, various ellipticities, a/c, several values of the yieldstress
to pressure ratio, ψ, and different levels of autofrettage,
ε, are evaluated. Autofrettage efficiency, η, for all
BEDA cases is determined, and is compared with that of
BEIA. The largest combined SIF KNmax is found to vary
with angular location along the crack front and number
of cracks and therefore needs to be evaluated for each
particular case. The Bauschinger Effect is found to have
a dramatic detrimental impact on the fatigue life of the
thick-walled cylinder. For a partially autofrettaged thickwalled
cylinder, ε < 100%, it is found that the lower the
level of autofrettage, the smaller the Bauschinger Effect
is. Increasing ε beyond 60% is found to be counterproductive
and is not recommended.
Perl, M., , C.L., , V.R. (2006). The bauschinger effect's impact on the 3-D combined sifs for radially cracked fully or partially autofrettaged thick-walled cylinders. Computer Modeling in Engineering & Sciences, 11(1), 37-48. https://doi.org/10.3970/cmes.2006.011.037
Vancouver Style
Perl M, CL, VR. The bauschinger effect's impact on the 3-D combined sifs for radially cracked fully or partially autofrettaged thick-walled cylinders. Comput Model Eng Sci. 2006;11(1):37-48 https://doi.org/10.3970/cmes.2006.011.037
IEEE Style
M. Perl, C.L. , and V.R. "The Bauschinger Effect's Impact on the 3-D Combined SIFs for Radially Cracked Fully or Partially Autofrettaged Thick-Walled Cylinders," Comput. Model. Eng. Sci., vol. 11, no. 1, pp. 37-48. 2006. https://doi.org/10.3970/cmes.2006.011.037
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