Thirty-six FRP composite welds were wetted with UV curing vinyl ester resin and used to join fiberglass tubes. The effects of UV light intensity and weld thickness on performance (as measured by bursting pressure and stiffness) were evaluated to determine optimal conditions for joint construction. The joined composite pipes were cured vertically with UV lamps at three different light intensities, 80 mW/cm2, 35 mW/cm2 and 15 mW/cm2 to isolate the effect of UV light intensity. Eight-layer, five-layer and three-layer joints were prepared and cured at constant light intensity to evaluate the effect of reducing the thickness of the composite joint. Finite element analysis (FEA) models were developed to simulate the physical conditions of testing, known mechanical properties of the materials used, and the negative effects of under curing and gravity leaching of resin due to vertical curing. The mechanism for variation in performance is under curing; joint performance is increased by reducing the incidence of under curing by increasing light intensity and decreasing joint thickness.
| Identifer | oai:union.ndltd.org:LSU/oai:etd.lsu.edu:etd-07052006-201255 |
| Date | 10 July 2006 |
| Creators | Peck, Jerry Alan |
| Contributors | Guoqiang Li, Su-Seng Pang, Marcio S. de Queiroz, Eyassu Woldesenbet |
| Publisher | LSU |
| Source Sets | Louisiana State University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lsu.edu/docs/available/etd-07052006-201255/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached herein a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to LSU or its agents the non-exclusive license to archive and make accessible, under the conditions specified below and in appropriate University policies, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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