Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Winnifried Wollner"'
Autor:
Nicolai Simon, Winnifried Wollner
Publikováno v:
PAMM. 22
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a782ff9505396a485732b6101f598bcc
https://doi.org/10.1002/pamm.202200184
https://doi.org/10.1002/pamm.202200184
Publikováno v:
Optimization Letters. 16:1355-1372
It is folklore knowledge that nonconvex mixed-integer nonlinear optimization problems can be notoriously hard to solve in practice. In this paper we go one step further and drop analytical properties that are usually taken for granted in mixed-intege
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f919e69a7d27fc445dd86581bdff69c
https://doi.org/10.1007/s11590-021-01827-9
https://doi.org/10.1007/s11590-021-01827-9
Autor:
Masoumeh Mohammadi, Winnifried Wollner
Publikováno v:
Optimization and Engineering. 22:2127-2149
A control problem for a linearized time-discrete regularized fracture propagation process is considered. The discretization of the problem is done using a conforming finite element method. In contrast to many works on discretization of PDE constraine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5b76e8798da4001c3c9f0e37f575787
https://doi.org/10.1007/s11081-020-09574-z
https://doi.org/10.1007/s11081-020-09574-z
Publikováno v:
Non-standard Discretisation Methods in Solid Mechanics ISBN: 9783030926717
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3425e9a029a5ed8ab7eabae6f5e44852
https://doi.org/10.1007/978-3-030-92672-4_8
https://doi.org/10.1007/978-3-030-92672-4_8
Publikováno v:
Applied Numerical Mathematics. 144:83-99
Goal-oriented mesh adaptation, in particular using the dual-weighted residual (DWR) method, is known in many cases to produce very efficient meshes. For obtaining such meshes the (numerical) solution of an adjoint problem is needed to weight the resi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::481de2350112ac031b6e06bd3f0e9e34
https://doi.org/10.1016/j.apnum.2019.05.016
https://doi.org/10.1016/j.apnum.2019.05.016
Publikováno v:
Computational Mechanics. 65:61-78
Within this work, we develop a phase-field description for simulating fractures in nearly incompressible materials. It is well-known that low-order approximations generally lead to volume-locking behaviors. We propose an approach that builds on a mix
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df0eb236bd92c41bfd702c34ea890cd9
https://doi.org/10.1007/s00466-019-01752-w
https://doi.org/10.1007/s00466-019-01752-w
Publikováno v:
SIAM Journal on Control and Optimization. 57:1672-1690
We consider an optimal control problem of tracking type governed by a time-discrete regularized phase-field fracture or damage propagation model. The energy minimization problem describing the frac...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69c88274459ffa0390fa3069b7415b7a
https://doi.org/10.1137/18m122385x
https://doi.org/10.1137/18m122385x
Publikováno v:
International Series of Numerical Mathematics ISBN: 9783030793920
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10ef5efabdf5f089acdbe991b3a12581
https://doi.org/10.1007/978-3-030-79393-7_13
https://doi.org/10.1007/978-3-030-79393-7_13
Autor:
Mirjam Walloth, Winnifried Wollner
Within this article, we develop a residual type a posteriori error estimator for a time discrete quasi-static phase-field fracture model. Particular emphasize is given to the robustness of the error estimator for the variational inequality governing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c16553f307f493c829e56844e17a177c