T-elements analysis of plated on unilateral elastic Winkler-type foundation
This paper presents a hybrid–Trefftz finite element algorithm designated as fictitious load approach. Its originality resides in the formulation and practical application of concepts which make it possible to account for the unilateral contact conditions of a plate without modification of the finite element mesh. To reach this aim, the approach allows the movable interface between the contact and non–contact parts of the plate to travers any finite element subdomain. The adjustments are confined to fictitious load dependent terms, while the element stiffness matrices remain unchanged during the whole iterative process. Several numerical examples are analysed to assess the effectivity of the T–element algorithm and to compare it with some of the existing solutions of the same problem.
Unilateral plate contact with the elastic-plastic Winkler-type foundation
Abstract In this work contact problems of a plate with the elastic-plastic Winkler-type foundation has been solved. An unilateral character of bonds between plate and foundation has been taken into consideration. The effect of friction forces in the contact plane has been neglected and an incremental approach has been applied. An incremental problem has been formulated in a variational manner and solved by use of the finite element method. The results of numerical calculations for rectangular plates subjected to the simple and complex load processes have been presented.
Violence at Work
Part 1 Understanding violence at work: introduction - a catalyst for action patterns and trends explanations. Part 2 Responding to violence at work: legislative and regulatory interventions guidelines and best practice international action. Part 3 Future guidance: beyond violence - lessons for future action.