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Working Toward Sustainability
A comprehensive introduction to the ethics of sustainability for empowering professionals and practitioners in many different fields By building the framework for balancing technological developments with their social and environmental effects, sustainable practices have grounded the vision of the green movement for the past few decades. Now deeply rooted in the public conscience, sustainability has put its stamp on various institutions and sectors, from national to local governments, from agriculture to tourism, and from manufacturing to resource management. But until now, the technological sector has operated without a cohesive set of sustainability principles to guide its actions. Working...
Experimental and Theoretical Determination of Thermal Stresses in a Flat Plate
Thermal stresses induced in a flat, rectangular, 75S-T6 aluminum-alloy plate by nonuniform heating are determined both experimentally and theoretically. The characteristics of commercially available bonded resistance wire strain gages are first investigated to determine their suitability for measuring stresses under simple conditions of stress and temperature. The gages are then used to measure thermal stresses in the flat plate in order to study their suitability under more complicated conditions. The experimental results are found to be in satisfactory agreement (within plus or minus 5 percent of maximum calculated stress) with an approximate theoretical solution of the problem.
The Metal Worker
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NASA Technical Note
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