synopsisA plot of principal stress difference versus principal extension ratios has been used as a graphic representation of general deformation. Two analytic forms of the strain energy function for isotropic, incompressible materials are suggested. These involve five or nine terms, the coefficients of which are found by regression to the general deformation plot. The resulting stressstrain equations are used to predict particular deformations, for example, simple extension, and are also evaluated in model engineering design experiments. These experiments use iterative techniques to predict the shapes and pressures of inflated diaphragms and tubes, and it is shown that the equations lead to accurate results even at relatively high extensions.
2033
Research information is often recommended as a solution for occupational disease and injury. This study asks whether publicly available research information on prevention of a well-documented occupational hazard is acted on by an important sector in industry. The hazard, allergic contact dermatitis (ACD) caused by epoxy resins in paints, is particularly significant for painters, who may have to leave their jobs as a consequence of the condition. No evidence is found, according to a priori criteria, that paint manufacturers/suppliers acted on known prevention measures for epoxy resin ACD that are within their control to implement. The findings suggest that availability of research information alone fails to solve health and safety problems. Recommendations for avenues of direct and indirect enforcement where voluntary implementation is absent in the painting industry are suggested.
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