Please use this identifier to cite or link to this item: https://doi.org/10.1002/nme.2204
DC FieldValue
dc.titleUpper bound solution to elasticity problems: A unique property of the linearly conforming point interpolation method (LC-PIM)
dc.contributor.authorLiu, G.R.
dc.contributor.authorZhang, G.Y.
dc.date.accessioned2014-04-24T09:37:47Z
dc.date.available2014-04-24T09:37:47Z
dc.date.issued2008-05-14
dc.identifier.citationLiu, G.R., Zhang, G.Y. (2008-05-14). Upper bound solution to elasticity problems: A unique property of the linearly conforming point interpolation method (LC-PIM). International Journal for Numerical Methods in Engineering 74 (7) : 1128-1161. ScholarBank@NUS Repository. https://doi.org/10.1002/nme.2204
dc.identifier.issn00295981
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/51545
dc.description.abstractIt is well known that the displacement-based fully compatible finite element method (FEM) provides a lower bound in energy norm for the exact solution to elasticity problems. It is, however, much more difficult to bound the solution from above for general problems in elasticity, and it has been a dream of many decades to find a systematical way to obtain such an upper bound. This paper presents a very important and unique property of the linearly conforming point interpolation method (LC-PIM): it provides a general means to obtain an upper bound solution in energy norm for elasticity problems. This paper conducts first a thorough theoretical study on the LC-PIM: we derive its weak form based on variational principles, study a number of properties of the LC-PIM, and prove that LC-PIM is variationally consistent and that it produces upper bound solutions. We then demonstrate these properties through intensive numerical studies with many examples of 1D, 2D, and 3D problems. Using the LC-PIM together with the FEM, we now have a systematical way to numerically obtain both upper and lower bounds of the exact solution to elasticity problems, as shown in these example problems. Copyright © 2007 John Wiley & Sons, Ltd.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1002/nme.2204
dc.sourceScopus
dc.subjectElasticity
dc.subjectMesh-free methods
dc.subjectNodal integration
dc.subjectNumerical methods
dc.subjectPoint interpolation method
dc.subjectSolution bound
dc.typeArticle
dc.contributor.departmentMECHANICAL ENGINEERING
dc.contributor.departmentSINGAPORE-MIT ALLIANCE
dc.description.doi10.1002/nme.2204
dc.description.sourcetitleInternational Journal for Numerical Methods in Engineering
dc.description.volume74
dc.description.issue7
dc.description.page1128-1161
dc.description.codenIJNMB
dc.identifier.isiut000255697700005
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