Load classification

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  • Every corner on a track has a maximum speed or limit at which it can be driven. Your ability to find the limits of your car and yourself will determine the speed at which you will be able to negotiate each turn. We will always be able to go fastest with our foot to the floor and the steering wheel pointed straight ahead. But, as we approach a turn and start turning the steering wheel, we slow down even if we have our foot to the floor! By turning, we have created a sideways load on...

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  • Iron overload in the liver may occur in clinical conditions such as hemo-chromatosis and nonalcoholic steatohepatitis, and may lead to the deterior-ation of the normal liver architecture by mechanisms not well understood. Although a relationship between the expression of ICAM-1, and classical major histocompatibility complex (MHC) class I molecules, and iron over-load has been reported, no relationship has been identified between iron overload and the expression of unconventional MHC class I molecules....

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  • (BQ) The book shows how thermally induced stresses and strains due to curing, add to or subtract from those due to applied loads. Another important element, and one unique to this book, is an emphasis on the difference between specifying the applied loads, i.e., force and moment results, often the case in practice, versus specifying strains and curvatures and determining the subsequent stresses and force and moment results. This represents a fundamental distinction in solid mechanics.

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  • The result of applying a stress is a strain. There are many types of strain, developed for specific problems. ˙ deforms the sample at a constant strain rate, g , and measures the stress with a load cell resulting a stress (y-axis)–strain (x-axis) curve. Alternatively, we could apply a constant stress as fast as possible and watch the material deform under that load. This is the classical engineering creep experiment. If we also watch what happens when that stress is removed, we have the creep–recovery experiment (Figure 2.3b).

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