Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Todd S. Gross"'
Publikováno v:
American Society for Composites 2020.
Publikováno v:
Composite Structures. 189:366-377
Several stress-based failure criteria (von Mises, dilatational strain energy density, parabolic stress and Drucker-Prager) are implemented in a numerical model of a 3D woven composite to predict initiation of damage due to cooling after curing. It is
Publikováno v:
American Society for Composites 2019.
Three panels of 3D woven carbon fiber/RTM6 epoxy composites with a ply-to-ply weave with 12x12 (warp/weft) picks per inch (ppi), 10x12 ppi, and 10x8 ppi were fabricated by resin transfer molding. Realistic finite element models of each weave architec
Autor:
Jon Goering, H. Jafari, Harun H. Bayraktar, Borys Drach, J. Kusch, Igor Tsukrov, Todd S. Gross
Publikováno v:
Experimental Techniques. 41:45-50
The temperature dependence of the failure stress of RTM6 resin under nearly pure hydrostatic tension was measured for two standard curing cycles. The stress in the resin was achieved by confining the resin in capped quartz tubes while cooling from th
Publikováno v:
Composites Part A: Applied Science and Manufacturing. 130:105734
Process-induced residual stresses in 3D woven carbon-epoxy composites are studied by blind hole drilling experiments interpreted with finite element (FE) modeling. It is assumed that residual stresses are primarily caused by the difference in thermal
Publikováno v:
Metallurgical and Materials Transactions A. 45:4891-4896
The temperature above which neither stress nor plastic strain can cause austenite to transform to martensite is determined for 304 austenitic stainless steel by X-ray diffraction measurements on specimens that were previously subjected to isothermal
Publikováno v:
Key Engineering Materials. :257-260
Microcracking is often observed in the resin pockets of as-cured 3D woven composites with significant through-the-thickness fiber constraint. The resin is subjected to a triaxial tensile stress during cooling due to thermal expansion mismatch and shr
Publikováno v:
Carbon. 60:273-279
We observed unique convex damage patterns when performing nanoindentation normal to the deposition plane of ∼1.5 mm thick pyrolytic carbon produced by chemical vapor deposition. The damage consisted of a combination of delamination cracks parallel
Publikováno v:
Journal of Applied Polymer Science. 133
Triaxial residual tensile stresses resulting after cooling a 3D woven composite from the curing temperature cause cracking in the resin pockets for weave architectures that have high through-the-thickness constraint. We show how curing cycle modifica
Publikováno v:
International Journal of Engineering Science. 58:129-143
An approach to predict the effective thermoelastic properties of unidirectional composites consisting of cylindrically orthotropic fibers surrounded by layers of cylindrically orthotropic matrix is developed and applied to carbon/carbon composites. M