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In powder technology it is very essential to understand the fundamentals of particle adhesion with respect to product quality assessment and process performance. New force-displacement models of elastic-plastic, dissipative, adhesive and frictional contacts are shown. Using the model 'stiff particles with soft contacts', various contact deformation paths for loading, unloading, reloading and contact detachment are discussed. The adhesion force is found to be load dependent FH(FN). The contribution of this history dependent adhesion on the tangential force in an elastic-plastic frictional contact FT(FN, FH(FN)), the rolling resistance FR(FN, FH(FN)) and the torque of mobilized frictional contact rotation Mto(FN, FH(FN)) are derived. These constitutive models are generally applicable for solid micro-contacts but have been shown here for ultrafine limestone particles.
In powder technology it is very essential to understand the fundamentals of particle adhesion with respect to product quality assessment and process performance. New force-displacement models of elastic-plastic, dissipative, adhesive and frictional contacts are shown. Using the model 'stiff particles with soft contacts', various contact deformation paths for loading, unloading, reloading and contact detachment are discussed. The adhesion force is found to be load dependent FH(FN). The contribution of this history dependent adhesion on the tangential force in an elastic-plastic frictional contact FT(FN, FH(FN)), the rolling resistance FR(FN, FH(FN)) and the torque of mobilized frictional contact rotation Mto(FN, FH(FN)) are derived. These constitutive models are generally applicable for solid micro-contacts but have been shown here for ultrafine limestone particles.
Mechanics of particle adhesion
Mechanik der Partikeladhäsion
Tomas, J. (author)
2006
10 Seiten, 5 Bilder, 39 Quellen
Conference paper
Storage medium
English
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