Yj. Kim et al., Simplified J-estimations based on the Engineering Treatment Model for homogeneous and mismatched structures, ENG FRACT M, 68(1), 2001, pp. 9-27
This paper presents simplified J-estimation equations for defective homogen
eous and strength mismatched structures, based on the Engineering Treatment
Model (ETM). For homogeneous structures, two modifications are made to the
existing ETM J-estimation equations; firstly a modification of the contain
ed yielding solutions, and secondly modification of J-estimation equations
for materials exhibiting Luders strain. Based on the proposed J-estimation
equations for homogeneous structures, J-estimation equations for welded str
uctures with strength mismatch are proposed.
The proposed J-estimation equations for both homogeneous and mismatched str
uctures are then compared with selected elastic-plastic finite element resu
lts. The comparisons show excellent agreement and so provide confidence in
the use of the proposed J-estimation equations for defect assessment. Final
ly, comparison with another simplified method, the R6 method, is discussed.
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