November 2024
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4 Reads
Ships and Offshore Structures
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Publications (3)
February 2024
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28 Reads
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6 Citations
Thin-Walled Structures
April 2022
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103 Reads
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2 Citations
Similarity laws of scaled models of offshore platform deck structures under low velocity impact loading are proposed in the present research. The similarity laws of scaled models with different scaling factors are established in forms of dimensionless factors with consideration of flow stress differences of the materials. A dimensionless displacement is defined by dividing displacement by plate thickness and a dimensionless force is defined by dividing force by flow stress and plate thickness; then, a dimensionless force-displacement relationship is established. Dynamic responses of three geometrically similar stiffened structures with scaling factors of 1:4, 1:2, and 1:1 subjected to the dropping impact of a rigid triangular pyramidic impactor are investigated by an experimental test and a finite element analysis. Results show that dimensionless force-displacement curves of geometrically similar plates coincide with each other; meanwhile, the difference of maximum impact force for the three structures with various scaling factors is less than 5%, and the difference of maximum impact depth is less than 1%, which definitely show the effectiveness of the scaling laws based on dimensionless factors. The present research provides useful insight into the similarity laws of dynamic responses of deck structures subjected to falling object impact and would be used in the crashworthiness research and design process of the offshore structures.
Citations (2)
... Further increasing the impact energy to 15 J, fiber fracture occurred on the front side of all specimens (Fig. 8c, f, i and l), and the extent of damage in the 0° direction on the back side due to fiber splitting [26] increased again (Fig. 8c-, Fig. 8f-, Fig. 8i-and Fig. 8l-), but still B2 and B3 with bonding surfaces at 1/4 and 3/4 of the thickness had obviously less damage than B0 and B1. This was because the bending and shear stresses during the impact process would cause matrix cracking and exacerbate delamination [27], while the bonding surfaces distributed at the above locations as quasi isotropic materials joining two CFRP unidirectional plys might change the direction of crack propagation to play a role in inhibiting the damage extension, which in turn reduced the impact damage formed on the backside of the composites. ...
- Citing Article
February 2024
Thin-Walled Structures
... Chen BQ et al. [19] proposed a wedge-shaped impactor to simulate a bulbous bow and conducted an experimental investigation on the responses of a double-hull ship side structure under the impact of a wedge impactor. Zhou H, et al. [20] determined the dynamic responses of deck structures under the impact of a falling sharp object to simulate the corner of a falling container and established a similarity law between a small-scale model and a full-scale prototype. Compared to conventional stiffened plates, novel structures including sandwich panels have the advantage of loading efficiency; therefore, the impact responses of novel structures have recently become a research hotspot. ...
- Citing Article
- Full-text available
April 2022