β Scribed by Yuttanant Boonyongmaneerat; David C. Dunand
No coin nor oath required. For personal study only.
A set of analytical models based on engineering beam analysis is developed to predict creep behavior of cellular materials over a broad range of relative density. Model predictions, which take into account the presence of mass at strut nodes and consider different possible deformation mechanisms and foam architectures, are compared to experimental creep results for a replicated nickel-base foam and a reticulated aluminum foam. As porosity decreases, the controlling creep mechanism in the foams changes from strut bending, to strut shearing, and ultimately to strut compression.
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Effects of annealing and atactic fraction on structural properties of isotactic polypropylene were investigated using various methods which included X-ray, NMR and DSC. Annealing at elevated temperatures results in considerable increases in crystallinity, ~m, crystal thickness, lc, heat of fusion, A
Removal of cells may decrease the antigenicity and risk of disease transmission associated with tendon allografts and xenografts. An ideal cell removal method would not compromise graft structure and mechanical properties. This study compared the effects of three extraction chemicals [t-octyl-phenox
The oxidation behaviour of several commercial alloys in simulated steam was investigated and compared with that of model alloys with systematic variations of selected alloying elements in the temperature range of 550 8C to 650 8C. Also, creep tests of specimens pre-oxidized in steam or in flue gas w