Applications plastic hinges

Uses and applications plastic hinges, RF capacitors, food containers, plastic pails, car batteries, wastebaskets, pharmacy prescription bottles, cooler containers, dishes and pitchers, carpets, rugs and mats, ropes. 

Provided that, in the absence of walls, the storey collapse mechanisms can be activated due to the formation of plastic hinges both at the top and at the bottom of the storey columns, the application should aim to enhance the tensile capacity in those areas with a view to limit the formation of the aforementioned hinges. In no case is the removal of the storey collapse mechanism allowed, with only the goal of increasing the magnitude of the displacements leading to its activation. 

Table 1 An overview on the application fields of plastic hinges [1]. 

A standard linear response spectrum analysis (RSA) is performed at each (i) th incremental pushover step for the unit value of the unknown incremental scale factor = 1) by considering instantaneous mode shapes that are compatible with the current distribution of plastic hinges and the initial elastic spectral displacements taken as seismic input. Such a linear response spectrum analysis (RSA) effectively corresponds to adaptive pushover analyses, which are simultaneously performed in each mode followed by the application of an appropriate modal combination rule. Thus, any response quantity of interest, which is represented by a generic response quantity, r, is obtained for the unit value of the unknown incremental scale factor. Now, the increment of the generic response quantity, Ar, is expressed as... 

Design criteria Avoidance of collapse Special notes with application to the earthquake load combination, avoidance of soft-story mechanisms, plastic hinge locations, and other combinations 5... 

Polyacetals and other engineering plastics cost about half that of cast metals, and are therefore used as replacements for cast metal-intense applications. They have been approved by the Food and Drug Administration for contact with foods. Some of the uses of molded polyacetals are as valves, faucets, bearings, appliance parts, springs, automotive window brackets, hose clamps, hinges, video cassettes, tea kettles, chains, flush toilet float arms, gears, shower heads, pipe fittings, pasta machines, desktop staplers, and air gun parts. 

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