Work

Three-dimensional shakedown solutions for cohesive-frictional materials under moving surface loads

Year: 2012

Type: article

Abstract: Pavement and railtrack design is of huge importance to society and yet the theoretical basis for most current design methods is still very simplistic and crude ( Brown, 1996 , Yu, 2006 ). This paper is part of a concerted effort at the Nottingham Centre for Geomechanics to develop improved theoretical foundations for pavement and railtrack design. It is mainly concerned with the development of rigorous lower-bound solutions for shakedown of cohesive-frictional materials under three-dimensional moving traffic loads. Compared with previous studies, two important aspects are taken into account. First, this paper considers a more general case of elliptical contact area between traffic and material surface, as most previous lower-bound studies considered the traffic load is applied through an infinite long roller. Secondly, by introducing a critical self-equilibrated residual stress field, this shakedown problem is reduced to a formulation in terms of a load parameter only. By using a simple optimisation procedure, the maximum load parameter leads to a lower-bound shakedown limit to this problem. Results for the special case of circular contact area are also presented in analytical form, which can then be readily applied for practical design.

Source: International Journal of Solids and Structures

DOI: 10.1016/j.ijsolstr.2012.08.011

Authors: Hai-Sui Yu, Juan Wang

Institution: University of Nottingham

Language: English

Topic: Contact Mechanics and Variational Inequalities

Subfield: Computational Theory and Mathematics

Field: Computer Science

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $3,790