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http://dx.doi.org/10.3744/SNAK.2012.49.3.232

On the Plastic Deformation of Polar-Class Ship's Single Frame Structures Subjected to Collision Loadings  

Min, Dug-Ki (Hyundai Mipo Dockyard Co., Ltd.)
Shin, Dong-Wan (University of Ulsan)
Kim, Sin-Ho (University of Ulsan)
Heo, Yeoung-Mi (University of Ulsan)
Cho, Sang-Rai (University of Ulsan)
Publication Information
Journal of the Society of Naval Architects of Korea / v.49, no.3, 2012 , pp. 232-238 More about this Journal
Abstract
The effects of temperature on the structural behavior of polar class vessels have been experimentally and numerically investigated. Experiments were carried out on single frame structures made of steel material, DH36, which is used for outer shell of the vessels making transit through the polar region. A knife edge type striker was dropped down onto single frame structures. The temperatures of the single frames were set to $-30^{\circ}C$, $-50^{\circ}C$ and room temperature. The deflection around the mid-point of the single frame was measured and numerically simulated using finite element model. Strain rate effect on the structural behavior has been investigated and turned out that the strain rate effect can be neglected. From the results of the experiment and numerical analyses, it has been noticed that the permanent deflection at lower temperature was reduced due to a temperature hardening of material as expected.
Keywords
Polar-class ship; Single frame; Strain rate; Temperature hardening;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Choung, J.M., 2007. On the Fracture Criteria of Steels for Marine Structures Subjected to Impact Loadings. Ph.D. University of Ulsan.
2 Choung, J.M. Im, S-W. & Kim, K.S., 2011. Plasticity and Fracture Behaviors of Marine Structural Steel, Part V: Effects of Strain Rate and Temperature. Journal of Ocean Engineering and Technology, 25(3), pp.74-85.
3 Lee, J.W., 1983. On the Optimization Design of Soft Bow Structure. Proc. of the second Internal Symposium on Practical Design of Ships and Mobile Units, pp.429-435.
4 Lim, J-H., 2005. Study on dynamic tensile tests of auto-body steel sheet at the intermediate strain rate for material constitutive equations. Ph.D. KAIST.
5 Min, D-K. Heo, Y-M. & Cho, S-R., 2012. Low Temperature Plastic Hardening Constitutive Equation for Steels of Polar Class Vessels. Journal of the Society of Naval Architects of Korea. (Accepted for publication June 2012).
6 Min, D-K. Shim, C-S. & Cho, S-R., 2010. On the Mechanical Properties at Low Temperature for Steels of Ice-Class Vessels. Journal of the Society of Naval Architects of Korea, 48(2), pp.171-177.
7 Nemat-Nasser, S. & Guo, W.G., 2003. Thermo -mechanical Response of DH-36 Structural Steel Over a Wide Range of Strain Rates and Temperature. Mech. Mat., 35, pp.1023-1047.   DOI   ScienceOn
8 Paik, J.K. & Chung, J.Y., 1999. A basic study on static and dynamic crushing behavior of a stiffened tube. KSAE Transactions, 7(1), pp.219-238.