Explicit Discrete Element Method for Block Systems – the Distinct Element Method

摘要: Publisher Summary This chapter presents the main features of distinct element method in context UDEC/3DEC codes. A brief discussion is also presented on basic characteristics other It emphasizes presentation block geometry, deformation, contact, damping, solution techniques and data structure. The mathematical dynamic relaxation are detail or formulations briefly presented. Most available codes use linked-list structure to create update geometry systems. central finite difference (FDM) applied integrate Newton–Euler equations motion for rigid systems Cauchy deformable based either static techniques. contact detection updating performed ‘contact overlap’ concept, by which amount interpenetration depth between two blocks at a point regarded as relative normal deformation point. three aspects together with important issues regarding numerical stability, alternative formulations. Presentation method, some theoretical concepts relating approximation functions their derivatives, technique introduced. introduces classified into categories: those using principles principles.