首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Force distribution in an inhomogeneous sandpile
Authors:JM Huntley
Institution:(1) Loughborough University, Department of Mechanical Engineering, Loughborough LE11 3TU, UK, GB
Abstract:The force perturbation field in a two-dimensional pile of frictionless gravity-loaded discs or spheres arising from lattice distortions is derived to first order. The starting point is the model proposed by Liffman et al. (Powder Technology (1992) pp. 255-267) and Hong (Phys. Rev. E 47, 760-762 (1993)) in which discs of uniform size are arranged on a regular lattice: this predicts a uniform normal stress distribution at the base of the pile. The analysis is applied to two problems: (i) deformable (rather than rigid) grains that undergo Hertzian deformation at the points of contact; (ii) a pile containing a gradient in particle size from the centre to the free surfaces. The former results in the classical pressure dip at the centre; the latter also produces a dip if the larger particles are at the centre. Received 29 January 1998 and Received in final form 7 September 1998
Keywords:PACS  81  05  Rm Porous materials  granular materials - 46  10  +z Mechanics of discrete systems - 83  70  Fn Granular solids
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号