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Dissertation
Behavior of pultruded glass fiber reinforced plastic I-beams under monotonic and cyclic patch loads
Doctor of Philosophy (Ph.D.), Drexel University
2001
DOI:
https://doi.org/10.17918/00008472
Abstract
The introduction of mass-produced glass fiber reinforced plastic (GFRP) structural shapes in bridges and other construction dictates the need to understand the fatigue behavior of these shapes. This study describes the fatigue performance of GFRP pultruded I-beams; an experimental study was conducted on both polyester and vinyl ester I-beams, under cyclic patch loads to monitor the fatigue performance, failure pattern, and stiffness degradation that could happen during the course of fatigue loading. The stress-range versus number of cycles, S-N curves, were produced for both polyester and vinyl ester beams considering the obtained mode of failure which was due to local crushing of the web matrix in the transverse direction under the applied patch load. An experimental study and finite element analysis were carried out to investigate the strength of these beams under the monotonically applied patch load because the obtained failure mode was the same like that under the cyclic load. Some equations were proposed to calculate the strength of pultruded beams under patch load and the minimum width of patch load required to avoid this local mode of failure.
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Details
- Title
- Behavior of pultruded glass fiber reinforced plastic I-beams under monotonic and cyclic patch loads
- Creators
- Mohamed Abdelmoaty Khalaf
- Contributors
- Mohamed Elgaaly (Advisor) - Drexel University, Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xvi, 245 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Drexel University
- Other Identifier
- 991021888856804721