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ARTICLE
A modified model of residual strength prediction for metal plates with through-thickness cracks
1
Northwestern Polytechnical University, School of Aeronautics, Xi’an, China
Submission date: 2018-05-11
Acceptance date: 2019-01-24
Publication date: 2019-07-15
Journal of Theoretical and Applied Mechanics 2019;57(3):537-547
KEYWORDS
ABSTRACT
A new model, accurate and easy-to-apply, has been proposed to predict the residual strength
for metal plates intact or with different damage degrees. In this model, we introduced the
damage degree factor (DDF) to quantify the initial damage condition of a plate. The middle
crack tension (M(T)) tests and multiple site damage (MSD) tension tests were performed
on plate specimens in aluminum alloy LY12-CZ and 2524-T3, respectively. For various da-
mage degrees, the predicted results of this new model showed an improved correlation with
test results compared to the net section yield criterion, K-apparent criterion and Duong’s
method.
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