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COMPLEX MODULUS OF ELASTICITY AND EQUIVALENT LATERAL STIFFNESS OF VARIOUS TYPES OF CONVEYOR BELTS
Abstract
Conveyor belt and especially its cover is viscoelastic material, which means that it combines viscous and elastic properties at the same time. In calculation of motion resistance, mainly in indentation rolling resistance, equivalent lateral stiffness of belts if necessary. To determine this value the distribution of compressive stress (both, in cover and cord) should be analysed. In mine conditions compressive stress in cord disappears gradually and top cover do not take part in cyclical compression. To calculate indentation rolling resistance properly separate analysis for cord and bottom cover is needed for different types of belts. Lateral stiffness depends from geometry and properties of belt, thickness of cover, geometry and type of belt etc. Distribution of compressive stress depends also on whether the cord of belt is steel or textile. To analyse this differences proper calculations of complex modulus of elasticity should be made. In this paper no approach of determination of modulus of elasticity was presented in context of establishing equivalent lateral stiffness of various types of conveyor belts.
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