The concept of Representative Crack Elements (RCE) for phase-field fracture: transient thermo-mechanics

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Abstract

The phase-field formulation for fracture based on the framework of representative crack elements is extended to transient thermo-mechanics. The finite element formulation is derived starting from the variational principle of total virtual power. The intention of this manuscript is to demonstrate the potential of the framework for multi-physical fracture models and complex processes inside the crack. The present model at hand allows to predict realistic deformation kinematics and heat fluxes at cracks. At the application of fully coupled, transient thermo-elasticity to a pre-cracked plate, the opened crack yields thermal isolation between both parts of the plate. Inhomogeneous thermal strains result in a curved crack surface, inhomogeneous recontact and finally heat flow through the crack regions in contact. The novel phase-field framework further allows to study processes inside the crack, which is demonstrated by heat radiation between opened crack surfaces. Finally, numerically calculated crack paths at a disc subjected to thermal shock load are compared to experimental results from literature and a curved crack in a three-dimensional application are presented.

Details

OriginalspracheEnglisch
Seiten (von - bis)1165-1176
Seitenumfang12
FachzeitschriftComputational Mechanics
Jahrgang69 (2022)
Ausgabenummer5
PublikationsstatusVeröffentlicht - 27 Jan. 2022
Peer-Review-StatusJa

Externe IDs

Scopus 85123917711
Mendeley 8dae2e3a-dbb3-3264-8cfe-142e894662e6

Schlagworte

Schlagwörter

  • Heat radiation, Multi-physics, Phase-field fracture, Representative crack element, Transient thermo-mechanics

Bibliotheksschlagworte