TY - JOUR
T1 - Accounting for high stress gradient by a modified weibull failure theory
AU - Ekwaro-Osire, S.
AU - Khandaker, M. P.H.
AU - Gautam, K.
N1 - Funding Information:
This research was based on observations collected at the ESO 8.2-m VLT-UT1 Antu telescope (program 68.C-0214A). JY acknowledges support from FCT (SFRH/BSAB/1423/2014). This research made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research also made use of the SIMBAD data base, operated at CDS, Strasbourg, France, as well as SAOIMAGE DS9, developed by the Smithsonian Astrophysical Observatory. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration.
PY - 2008/1
Y1 - 2008/1
N2 - A high stress gradient occurs in a component when the stress, due to external loading, rises asymptotically. The Weibull failure theory overestimates the probability of failure for components with high stress gradients generated due to the geometric irregularities, material mismatch, thermal mismatch, and contact loading. A modified Weibull failure theory is proposed in this paper. The method is based on the weight function method. The modified Weibull failure theory was applied to two specimens, and the results showed the ability of the proposed theory to handle high stress gradients. The theory considers variable equivalent stress intensity factors along the faces of cracks; hence, it considers the strength of a specimen to be dependent on the stress field.
AB - A high stress gradient occurs in a component when the stress, due to external loading, rises asymptotically. The Weibull failure theory overestimates the probability of failure for components with high stress gradients generated due to the geometric irregularities, material mismatch, thermal mismatch, and contact loading. A modified Weibull failure theory is proposed in this paper. The method is based on the weight function method. The modified Weibull failure theory was applied to two specimens, and the results showed the ability of the proposed theory to handle high stress gradients. The theory considers variable equivalent stress intensity factors along the faces of cracks; hence, it considers the strength of a specimen to be dependent on the stress field.
KW - High stress gradient
KW - Weibull failure theory
KW - Weight function method
UR - http://www.scopus.com/inward/record.url?scp=47049095521&partnerID=8YFLogxK
U2 - 10.1115/1.2806251
DO - 10.1115/1.2806251
M3 - Article
AN - SCOPUS:47049095521
SN - 0094-4289
VL - 130
SP - 110041
EP - 110048
JO - Journal of Engineering Materials and Technology, Transactions of the ASME
JF - Journal of Engineering Materials and Technology, Transactions of the ASME
IS - 1
ER -