Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X



Single phase energy minimizers for materials with nonlocal spatial dependence

Authors: Roger L. Fosdick and Darren E. Mason
Journal: Quart. Appl. Math. 54 (1996), 161-195
MSC: Primary 73V25; Secondary 49J20, 73C50
DOI: https://doi.org/10.1090/qam/1373845
MathSciNet review: MR1373845
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Abstract: We consider a one-dimensional body and assume that the total stored energy functional depends not only on the local strain field but also on the spatial average of the strain field over the body, weighted with an influence kernel. We investigate the problem of minimizing the total stored energy subject to given end displacements. The general existence theory for this problem is reviewed. Then, we narrow our study and concentrate on certain fundamental aspects of nonlocal spatial dependence by restricting our consideration to the case of a convex local energy and an exponential-type influence function for the nonlocal part. We find explicit solutions and show their characteristic properties as a function of the parameter that measures the extent of influence in the nonlocal kernel. We then study in detail the behavior that results when the total stored energy functional loses its coercivity. In this case, issues concerning the local and global stability of extremal fields are considered.

References [Enhancements On Off] (What's this?)

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DOI: https://doi.org/10.1090/qam/1373845
Article copyright: © Copyright 1996 American Mathematical Society

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