NDLI: A Rigid Punch on an Elastic Half-Space Under the Effect of Friction: A Finite Difference Solution

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Dorogoy, Avraham Banks-Sills, Leslie
Copyright Year	2008
Abstract	The accuracy of the finite difference technique in solving frictionless and frictional advancing contact problems is investigated by solving the problem of a rigid punch on an elastic halfspace subjected to normal loading. Stick and slip conditions between the elastic and the rigid materials are added to an existing numerical algorithm which was previously used for solving frictionless and frictional stationary and receding contact problems. The numerical additions are first tested by applying them in the solution of receding and stationary contact problems and comparing them to known solutions. The receding contact problem is that of an elastic slab on a rigid half-plane; the stationary contact problem is that of a flat rigid punch on an elastic half-space. In both cases the influence of friction is examined. The results are compared to those of other investigations with very good agreement observed. Once more it is verified that for both receding and stationary contact, load steps are not required for obtaining a solution if the loads are applied monotonically, whether or not there is friction. Next, an advancing contact problem of a round rigid punch on an elastic half-space subjected to normal loading, with and without the influence of friction is investigated. The results for frictionless advancing contact, which are obtained without load steps, are compared to analytical results, namely the Hertz problem; excellent agreement is observed. When friction is present, load steps and iterations for determining the contact area within each load step, are required. Hence, the existing code, in which only iterations to determine the contact zone were employed, was modified to include load steps, together with the above mentioned iterations for each load step. The effect of friction on the stress distribution and contact length is studied. It is found that when stick conditions appear in the contact zone, an increase in the friction coefficient results in an increase in the stick zone size within the contact zone. These results agree well with semianalytical results of another investigation, illustrating the accuracy and capabilities of the finite difference technique for advancing contact.
Sponsorship	International
Starting Page	259
Ending Page	271
Page Count	13
File Format	PDF
ISBN	9780791848364
DOI	10.1115/ESDA2008-59159
e-ISBN	0791838277
Volume Number	Volume 2: Automotive Systems; Bioengineering and Biomedical Technology; Computational Mechanics; Controls; Dynamical Systems
Conference Proceedings	ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis
Language	English
Publisher Date	2008-07-07
Publisher Place	Haifa, Israel
Access Restriction	Subscribed
Subject Keyword	Stress concentration Algorithms Friction Contact mechanics Slabs Elastic half space Stress
Content Type	Text
Resource Type	Article

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