A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
An abstract inf-sup problem inspired by limit analysis in perfect plasticity and related applications (2021)
Sysala, S., Haslinger, J., Reddy, B. D., & Repin, S. (2021). An abstract inf-sup problem inspired by limit analysis in perfect plasticity and related applications. Mathematical Models and Methods in Applied Sciences, 31(8), 1593-1623. https://doi.org/10.1142/s0218202521500330
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Sysala, Stanislav; Haslinger, Jaroslav; Reddy, B. Daya; Repin, Sergey
Lehti tai sarja: Mathematical Models and Methods in Applied Sciences
ISSN: 0218-2025
eISSN: 1793-6314
Julkaisuvuosi: 2021
Ilmestymispäivä: 17.06.2021
Volyymi: 31
Lehden numero: 8
Artikkelin sivunumerot: 1593-1623
Kustantaja: World Scientific Pub Co Pte Lt
Julkaisumaa: Singapore
Julkaisun kieli: englanti
DOI: https://doi.org/10.1142/s0218202521500330
Julkaisun avoin saatavuus: Ei avoin
Julkaisukanavan avoin saatavuus:
Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2009.03535
Tiivistelmä
This paper is concerned with an abstract inf-sup problem generated by a bilinear Lagrangian and convex constraints. We study the conditions that guarantee no gap between the inf-sup and related sup-inf problems. The key assumption introduced in the paper generalizes the well-known Babuška–Brezzi condition. It is based on an inf-sup condition defined for convex cones in function spaces. We also apply a regularization method convenient for solving the inf-sup problem and derive a computable majorant of the critical (inf-sup) value, which can be used in a posteriori error analysis of numerical results. Results obtained for the abstract problem are applied to continuum mechanics. In particular, examples of limit load problems and similar ones arising in classical plasticity, gradient plasticity and delamination are introduced.
YSO-asiasanat: matemaattiset mallit; plastisuus; matemaattinen optimointi; säätöteoria; numeerinen analyysi; virheanalyysi
Vapaat asiasanat: convex optimization; duality; inf-sup conditions on cones; regularization; computable majorants; delamination; limit analysis
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2021
JUFO-taso: 2