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The Importance of Nonlinear Strain Considerations in Belt Cover Indentation Loss

Conveyor Belt Indentation Loss

The Importance of Nonlinear Strain Considerations in Belt Cover Indentation Loss

This whitepaper presents a study which uses the measured properties of a typical backing material, including strain amplitude dependent data, and couples a simple one dimensional stress/strain material model with simple calculation methods of the indentation resistance to show that the indentation loss factor can vary considerably with the strain amplitude impressed upon the backing under typical design loads.
(ed. WoMaMarcel - 29/7/2014)
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Energy loss due to rolling resistance of rubber conveyor belts is a major factor in conveyor design and its determination is dependent on the properties of the rubber compound of the belt backing. Vulcanized, carbon black-filled backing compounds typically exhibit the so-called Payne effect, where, under cyclic loading, there is a dependence of the storage and loss moduli on the amplitude of the strain. In effect, the stress-strain response of these compounds is highly nonlinear. Yet in belt system design the indentation loss calculation is often based on the uniform strain, linear properties. This whitepaper presents a study which uses the measured properties of a typical backing material, including strain amplitude dependent data, and couples a simple one dimensional stress/strain material model with simple calculation methods of the indentation resistance to show that the indentation loss factor can vary considerably with the strain amplitude impressed upon the backing under typical design loads.
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