Showing papers by "Michigan Technological University published in 1969"

Axisymmetric plastic collapse of shells of revolution according to the Nakamura yield criterion

Abstract: The plastic collapse of thin shells of revolution under axisymmetric loads is considered. A rigid perfectly-plastic material is assumed. Methods of limit analysis are applied to find collapse loads. The Tresca-Mohr yield criterion, as closely approximated by Nakamura [1, 2] is used.

Redistribution equilibria on mercury

Abstract: The redistribution reactions involving mercury have received considerable study in the past few years, due in part to the simplicity of the redistributing systems and to the stability of the various organomercury compounds, as evidenced by their reduced sensitivity to air and moisture. This relatively low reactivity of the organomercury compounds is generally attributed to the low polarity of the carbon-to-mercury bond. As a result of the simplicity of the reacting systems, the redistributions of organomercury compounds with mercuric halides and organomercuric halides have been used as models for the study of electrophilic substitution reactions. The types of redistribution equilibria on mercury may be separated into five different categories: (a) redistribution of halogen on mercuric halides; (b) redistribution of mercuric halides with bis-organomercury compounds; (c) redistribution of mercuric halides with organomercuric halides; (d) redistribution of organomercuric halides with bis-organomercury compounds; and (e) redistribution of organic groups on bis-organomercury compounds. Only in the case of the first and last types of redistribution listed do the forward and reverse reactions appear to be of near equal importance. 1