博士 / 國立臺灣大學 / 工程科學與海洋工程學系 / 92 / FRP(Fiber Reinforced Plastic) has reduced the weight of the ship largely due to its excellence of high specific strength in structural application that motivates a prevailing high-speed vessel accordingly; however, as the consequence, the bottom of the craft will be exposed above the water and subjected to heavy slamming force while sailing in high speed in the sea. The slamming force not only causes damage of ship structures but also dominates the behavior of the craft due to its significant dynamic effects; therefore, we should examine this type of loads when considering the structural strength of craft.
The previous studies about slamming force mostly concentrate in the magnitude and distribution of the loads due to the limitation of experimental devices; besides, the mechanical properties of the fiber types used by marine FRP laminates are very complicated; thus, the failure behavior of FRP bottom structures subjected to slamming loads should be studied thoroughly.
For the first thing of this research, the information about the slamming loads will be examined. Secondly, we focus on the failure behavior of the marine GFRP laminates; by the method of separating the sections into fiber layers and matrix layers, along with experimental data, we can establish the finite element model of the marine GFRP laminates made of a single type fiber; after adopting suitable failure criterion and stiffness modification factor curve, the failure behavior can be simulated. Then the mechanical properties of the laminates composed of different types of fibers can be predicted precisely by this numerical model without further material experiments.
Afterward, the foregoing content were taken as basis to analyze the bottom structures of craft in association with a design of an experimental apparatus for the purpose of creating failure on the test pieces under hydrostatic pressure and a hydrodynamic pressure identical to the exerting pattern of slamming loads; then we can verify the correctness of numerical methods for analyzing the failure behavior of GFRP laminates subjected to hydrostatic or hydrodynamic pressure. In so proceeding, the cause and behavior of failure is comprehended and can be regarded as the reference for relevant design.
| Identifer | oai:union.ndltd.org:TW/092NTU00345003 |
| Date | January 2003 |
| Creators | Cheng-Hsien Chung, 鍾承憲 |
| Contributors | Ya-Jung Lee, 李雅榮 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 0 |
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