Hamstad, M. A., Whittaker, J. W., Brosey, W. D.
Small, filament-wound, Kevlar/epoxy, biaxial test specimens were subjected to various levels of impact damage at the OaK Ridge Y-12 Plant. The specimens were pressurized in a proof test cycle to 58%...
A Note on the Anisotropic Acoustic Emission Behavior of HSLA Steels. (2002)
Ono,Kanji, Shibata,M., Hamstad,M. A.
Elongated MnS inclusions in HSLA steel produces no detectable burst emission activity when a steel test sample is stressed in tension or in compression along the longitudinal direction. This is in...
W. H. Prosser, M. A. Hamstad, J. Gary, A. O'Gallagher
The capability of a three-dimensional dynamic finite element method for predicting far-field acoustic emission signals in thin plates of finite lateral extent, including their reflections from the...
Finite Element and Plate Theory Modeling of Acoustic Emission Waveforms (1999)
Prosser Hamstad Gary, W. H. Prosser, M. A. Hamstad, J. Gary
A comparison was made between two approaches to predict acoustic emission waveforms in thin plates. A normal mode solution method for Mindlin plate theory was used to predict the response of the...
Filament-Wound Kevlar 49/Epoxy Pressure Vessels. (1998)
Chiao, T. T., Hamstad, M. A., Marcon, M. A., Hanafee, J. E.
The performance of an organic fiber (Keviar 49) has been investigated. First, a detailed study of the strength of fiber/epoxy strands was completed. Variables studied included: fiber uniformity,...
High Performance Fiber/Epoxy Composite Pressure Vessels. (1998)
Chiao, T. T., Hamstad, M. A., Jessop, E. S., Toland, R. H.
During the 1974-1976 report period our principal efforts were directed in the following areas: (1) determining the applicability of an ultrahigh strength graphite fiber to composite pressure vessels;...