BEGIN:VCALENDAR VERSION:2.0 PRODID:-//DTU.dk//NONSGML DTU.dk//EN CALSCALE:GREGORIAN BEGIN:VEVENT DTSTART:20230223T133000Z DTEND:20230223T141500Z SUMMARY:DCAMM seminar - Some topics in gradient extended crystal plasticity, damage, and oxygen assisted intergranular fracture DESCRIPTION:

A DCAMM seminar will be presented by

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Magnus Ekh, Professor
\nDivision of Material and Computational Mechanis
\nChalmers University of Technology, Gothenburg, Sweden 

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Abstract:
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\nThis presentation will give an overview of activities in the field of gradient-enhanced theories of crystal plasticity. The starting point is a thermodynamically consistent formulation whose aim is to capture the size-dependent behavior of polycrystals. For this formulation, different numerical algorithms to solve the resulting coupled FE problem have been investigated. The boundary conditions for the extended gradient field both at the outer and inner boundaries of a volume element are discussed and the influence of different choices is analyzed.
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\nFurthermore, the model formulation is developed to include damage with the aim to simulate ductile fracture. Numerical results of a single-crystalline metal will be present to show how the damage propagates inside the grain and the interaction with the grain boundary conditions. Finally, a grain boundary model for oxygen-assisted intergranular fracture will be summarized and some results showing its main characteristics will be shown.

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\nDanish pastry, coffee and tea will be served 15 minutes before the seminar starts. 

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\nAll interested persons are invited

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A DCAMM seminar will be presented by

\n


\n

\n

Magnus Ekh, Professor
\nDivision of Material and Computational Mechanis
\nChalmers University of Technology, Gothenburg, Sweden 

\n

\n
\n

\n

\n 
\n

\n  \n

Abstract:
\n
\nThis presentation will give an overview of activities in the field of gradient-enhanced theories of crystal plasticity. The starting point is a thermodynamically consistent formulation whose aim is to capture the size-dependent behavior of polycrystals. For this formulation, different numerical algorithms to solve the resulting coupled FE problem have been investigated. The boundary conditions for the extended gradient field both at the outer and inner boundaries of a volume element are discussed and the influence of different choices is analyzed.
\n
\nFurthermore, the model formulation is developed to include damage with the aim to simulate ductile fracture. Numerical results of a single-crystalline metal will be present to show how the damage propagates inside the grain and the interaction with the grain boundary conditions. Finally, a grain boundary model for oxygen-assisted intergranular fracture will be summarized and some results showing its main characteristics will be shown.

\n

\n
\nDanish pastry, coffee and tea will be served 15 minutes before the seminar starts. 

\n

\n
\nAll interested persons are invited

URL:http://www.dcamm.dk/kalender/2023/02/seminar_no_764 DTSTAMP:20260405T184800Z UID:{331FD947-D564-457A-9161-6278F6DEC566}-20230223T133000Z-20230223T133000Z LOCATION: Building 402, Room 025, Technical University of Denmark END:VEVENT END:VCALENDAR