Abstract
Premature failure of asphalt-shingled roofing systems due to high winds is a major financial issue in the United States. In this study, the mechanism for sealant separation in three-tab shingle systems is evaluated experimentally using (a) in-situ StereoDIC measurements of the deformations in a model shingled roof system subject to wind gusts up to 150 mph and (b) separate fracture experiments for the sealant material to obtain the traction-separation relationship as a function of bonding parameters including temperature and pressure. Results from the series of fracture experiments showed that lower bonding temperatures (55 °C) resulted in partial sealing of the shingles, with separation characterized by adhesive failure of the sealant during wind loading. Shingles with sealant bonding at higher temperature (70 °C) remained intact for more than 2 hours when subjected to wind speeds up to 150 mph.
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Notes
- 1.
Independent StereoDIC measurements of the deflections of the plywood sheet bolted to the rigid pedestal frame were performed by the authors for wind loading above 150 mph. Results showed that the plywood surface motion was less than 20 μm at maximum wind speed.
- 2.
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Acknowledgements
The support of the Department of Mechanical Engineering and the State of South Carolina Center for Mechanics, Materials and NDE, including financial support for graduate and undergraduate students, open access to the wind tunnel and machining/fabrication of the nearly rigid support structure for the shingle system, are gratefully acknowledged.
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Rajan, S., Myers, T., Sutton, M.A. (2021). Failure of Three-Tab Shingles Subjected to Wind Gusts Up To 150 MPH: A DIC Based Study. In: Notbohm, J., Karanjgaokar, N., Franck, C., DelRio, F.W. (eds) Mechanics of Biological Systems and Materials & Micro-and Nanomechanics & Research Applications. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-030-59765-8_17
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