Mechanical and electrical behaviors of polymer particles. Experimental study of the contact area between two particles. Experimental validation of a numerical model

Plantard, G.; Papini, Marie

doi:10.1007/s10035-004-0194-6

Cited by 21 publications

(6 citation statements)

References 27 publications

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“…VuQuoc and Zhang modeled the normal force-displacement relationship of elasto-plastic spheres [22,23] and, more recently, developed an algorithm for the tangential and normal interactions of elasto-plastic spheres [24,25]. Experimental validation of this advanced normal force model is provided in [26] for polymer spheres. The paper assumes that the particles are spherical at their contact, although Jäger's theory encompasses other shapes [20].…”

Section: R Kuhnmentioning

confidence: 96%

Implementation of the Jäger contact model for discrete element simulations

Kuhn

2011

Numerical Meth Engineering

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SUMMARYIn three-dimensional discrete element method (DEM) simulations, the particle motions within a granular assembly can produce bewildering sequences of movements at the contacts between particle pairs. With frictional contacts, the relationship between contact movement and force is non-linear and path-dependent, requiring an efficient means of computing the forces and storing their histories. By cleverly applying the principles of Cattaneo, Mindlin, and Deresiewicz, Jürgen Jäger developed an efficient approach for computing the full three-dimensional force between identical elastic spheres that have undergone difficult movement sequences (J. Jäger, New Solutions in Contact Mechanics. WIT Press: Southampton, U.K.). This paper presents a complete Jäger algorithm that can be incorporated into DEM codes and also describes three special provisions for DEM simulations: (1) a method for handling particle pairs that undergo complex tumbling and twirling motions in three-dimensions; (2) a compact data structure for storing the loading history of the many contacts in a large assembly; and (3) an approximation of the Jäger algorithm that reduces memory demand. The algorithm addresses contact translations between elastic spheres having identical properties, but it does not resolve the tractions produced by twisting or rolling motions. A performance test demonstrates that the algorithm can be applied in a DEM code with modest increases in computation time but with more substantial increases in required storage.

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Section: R Kuhnmentioning

confidence: 96%

Implementation of the Jäger contact model for discrete element simulations

Kuhn

2011

Numerical Meth Engineering

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“…Vu-Quoc et al developed an elastoplastic normal force-displacement model by correcting a Hertzian model to account for plastic deformation [14,15]. This normal force model was successfully validated using drop tests and compression tests on soybeans [16] and for columns of polystyrene particles [17].…”

Section: Point Contact Modelsmentioning

confidence: 99%

Volumetric Modeling and Experimental Validation of Normal Contact Dynamic Forces

Boos¹,

McPhee

2012

Journal of Computational and Nonlinear Dynamics

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A volumetric contact dynamics model has been proposed for the purpose of generating reliable and rapid simulations of contact dynamics. Forces and moments between bodies in contact can be expressed in terms of the volume of interference between the undeformed geometries. This allows for the modeling of contact between complex geometries and relatively large contact surfaces, while being computationally less expensive than finite element methods. However, the volumetric model requires experimental validation. Models for simple geometries in contact have been developed for stationary and dynamic contact, and an apparatus has been developed to experimentally validate these models. This paper focuses on validation of the normal contact models. Measurements of forces and displacements will be used to identify the parameters related to the normal force, i.e., the volumetric stiffness and hysteretic damping factor for metallic surfaces. The experimental measurements are compared with simulated results to assess the validity of the volumetric model.

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“…The CEB model suffers from a discontinuity in contact load as well as in the first derivatives of both contact load and contact area at the transition from the elastic to the elasto-plastic regime. Vu-Quoc and Zhang (1999), Vu-Quoc et al (2001 made further advance in the theory and numerical analysis, and proposed an accurate elasto-plastic NFD (normal force-displacement) model, which had been experimentally validated in Plantard and Papini (2005). But this model is only suitable to the elasto-perfectly plastic material.…”

Section: Introductionmentioning

confidence: 96%

Damage analysis and dynamic response of elasto-plastic laminated composite shallow spherical shell under low velocity impact

Yi-ming

Mao

Tian

2010

International Journal of Solids and Structures

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a b s t r a c tBased on the elasto-plastic mechanics, the damage analysis and dynamic response of an elasto-plastic laminated composite shallow spherical shell under low velocity impact are carried out in this paper. Firstly, a yielding criterion related to spherical tensor of stress is proposed to model the mixed hardening orthotropic material, and accordingly an incremental elasto-plastic damage constitutive relation for the laminated shallow spherical shell is founded when a strain-based Hashin failure criterion is applied to assess the damage initiation and propagation. Secondly, using the presented constitutive relations and the classical nonlinear shell theory, a series of incremental nonlinear motion equations of orthotropic moderately thick laminated shallow spherical shell are obtained. The questions are solved by using the orthogonal collocation point method, Newmark method and iterative method synthetically. Finally, a modified elasto-plastic contact law is developed to determine the normal contact force and the effect of damage, geometrical parameters, elasto-plastic contact and boundary conditions on the contact force and the dynamic response of the structure under low velocity impact are investigated.

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Mechanical and electrical behaviors of polymer particles. Experimental study of the contact area between two particles. Experimental validation of a numerical model

Cited by 21 publications

References 27 publications

Implementation of the Jäger contact model for discrete element simulations

Implementation of the Jäger contact model for discrete element simulations

Volumetric Modeling and Experimental Validation of Normal Contact Dynamic Forces

Damage analysis and dynamic response of elasto-plastic laminated composite shallow spherical shell under low velocity impact

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