- Author
- Martin, J. W. | Embree, E. J. | Bentz, D. P.
- Title
- Effect of Temperature and Stress on the Time-to-Failure of EPDM T-Peel Joints.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Book or Conf
- Applied Technology for Improving Roof Performance. NBS/NRCA Roofing Technology Conference, 8th. Proceedings. April 16-17, 1987, National Roofing Contractors Assoc. (NRCA), Rosemont, IL, Gaithersburg, MD, 69-74 p., 1987
- Keywords
- roofing (finishes) | temperature | time | failure | stress (mechanics)
- Identifiers
- accelerated aging; creep-rupture; singly-ply; T-peel; Weibull distribution
- Abstract
- Creep-rupture experiments were conducted on adhesively bonded EPDM T-peel seams to determine the sensitivity of the time-to-failure distributions to temperature and mechanic1 stress. Experimental results indicate that time-to-failure distributions are very sensitive to mechanical stress, but not temperature. That is, at a given temperature, as mechanical stress increases, in the time-to-failure distributions decrease. However, at a give stress, changes in temperature do not cause a significant change in the time-to-failure distributions, except at the lowest experimental stress level where an increase in temperature may result in a increase in the times-to-failure. This increase, at the lowest experimental stress, is due to the formation of fibers between separating seam plies. This This change in failure mode at the lowest experimental stess level may limit the use of temperature and stress as acceleration factors.