Analyzing material softening and strain localisation through embedded strong discontinuity approach within velocity-based beam formulation

Kusuma Chandrashekhara, Sudhanva (avtor), Zupan, Dejan (avtor)

In this paper, we propose a novel computational formulation capable of solving the problem of material softening and the emerging localisation of strains in spatial frame-like structure, a common phenomenon for brittle heterogeneous materials. This study adopts the embedded strong discontinuity approach within our original velocity-based framework. The velocity-based formulation is thus enhanced with additional capabilities of detection of critical load level and critical cross-section and introduction of the jump-like variables at the level of velocities and angular velocities to enable more realistic description of strain localisation. A modified consistency condition is derived using the method of weighted residuals in complete accordance with the theoretical concept of strong discontinuity. One of the key advantages of the proposed method is its computational efficiency, which is preserved even after detecting cross-sectional singularities and handling post-critical localised strains. The numerical examples show the effectiveness and robustness of the proposed approach.

• Jezik: Angleški jezik
• Ključne besede: civil engineering, embedded discontinuity, material softening, three-dimensional rotations, post-critical analysis, strain localisation
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 16 str.
• Številčenje: Vol. 301, art. 107464
• PID: 20.500.12556/RUL-159254
• UDK: 624.04:624.072
• ISSN pri članku: 0045-7949
• DOI: 10.1016/j.compstruc.2024.107464
• COBISS.SI-ID: 200643843
• Datum objave v RUL: 04.07.2024

Gradivo je del revije

• Naslov: Computers & structures
• Skrajšan naslov: Comput. struct.
• Založnik: Elsevier
• ISSN: 0045-7949
• COBISS.SI-ID: 4419338

Licence

• Licenca: CC BY-NC 4.0, Creative Commons Priznanje avtorstva-Nekomercialno 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc/4.0/deed.sl
• Opis: Licenca Creative Commons, ki prepoveduje komercialno uporabo, vendar uporabniki ne rabijo upravljati materialnih avtorskih pravic na izpeljanih delih z enako licenco.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: gradbeništvo, vključene nezveznosti, mehčanje materiala, prostorske rotacije, postkritična analiza, lokalizacija deformacij

Projekti

• Financer: EC - European Commission
• Program financ.: H2020
• Številka projekta: 860124
• Naslov: Joint Training on Numerical Modelling of Highly Flexible Structures for Industrial Applications
• Akronim: THREAD