SIZE EFFECT IN PENETRATION OF SEA ICE PLATE WITH PART-THROUGH CRACKS. II: RESULTS
ABSTRACT: After development of the theory in the part I paper, systems of up to 300 nonlinear equations are solved in this paper by the Levenberg-Marquardt optimization algorithm. The maximum load is reached when the circumferential cracks begin to form. Numerical calculations show a typical quasi b...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.695.682 http://www.civil.northwestern.edu/people/bazant/PDFs/Papers/376+with+discussion.pdf |
| Summary: | ABSTRACT: After development of the theory in the part I paper, systems of up to 300 nonlinear equations are solved in this paper by the Levenberg-Marquardt optimization algorithm. The maximum load is reached when the circumferential cracks begin to form. Numerical calculations show a typical quasi brittle size effect such that the plot of log CYN versus log h (where CXN = nominal stress at maximum load and h = plate thickness) is a descending curve whose slope is negligible only for h < 0.2 m and then gets gradually steeper, asymptotically approaching-112. The calculated size effect agrees with the existing test data, and contradicts previous plasticity solutions. |
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