Plastic torsional buckling of thin walled circular cylinders

Ünal, Zarif


Plastic rotation capacity of RC columns under biaxial seismic demands
Özcan, Okan; Binici, Barış (2023-03-01)
Seismic performance of reinforced concrete (RC) columns should be evaluated considering biaxial demands for a more realistic assessment. However, most of the current seismic assessment regulations stipulate rotation capacity estimations considering only uniaxial bending test database. The effect of seismic demands in one direction may have a detrimental effect in the deformation capacity of the other direction. In the past studies, the influence of biaxial loading patterns/paths/histories, axial load level,...
Plastic anisotropy induced by strain path changes in BCC metals
Yalçınkaya, Tuncay; Geers, M G D (null; 2008-12-08)
Plastic object detection with an infrared hyperspectral image
Diri, Mehmet Fatih; Süzen, Mehmet Lütfi; Department of Geodetic and Geographical Information Technologies (2019)
Undoubtedly, a world without plastic, which is the most important production material in almost every area, seems inconceivable today. The production and consumption chain, by which induced this versatile use, has caused plastic pollution that has devastating effects on the environment and natural ecosystems. In this thesis, which written with the motivation of contributing to the fight against plastic pollution and to be useful developing effective and sustainable policies, plastic pollution and pollutant ...
Plastic slip patterns through rate-independent and rate-dependent plasticity
Lancioni, Giovanni; Yalçınkaya, Tuncay (2014-05-09)
Plastic deformation induces various types of dislocation microstructures at different length scales, which eventually results in a heterogeneous deformation field in metallic materials. Development of such structures manifests themselves as macroscopic hardening/softening response and plastic anisotropy during strain path changes, which is often observed during forming processes. In this paper we present two different non-local plasticity models based on non-convex potentials to simulate the intrinsic rate-...
Plastic slip patterning driven by rate dependent non convex strain gradient plasticity
Yalçınkaya, Tuncay; Geers, M G D (2010-05-17)
The mechanical response of many engineering materials is often influenced by an existing or emerging microstructure (martensite, dislocation sub-structures, voids, shear bands etc.). There have been various approaches to model the formation and evolution of such microstructures which involve coupled models. The difficulty in the modeling of these multi-field coupled problems is the localization of the corresponding field and strain hardening-softening elastoplastic behavior which yields numerical instabilit...
Citation Formats
Z. Ünal, “Plastic torsional buckling of thin walled circular cylinders,” Middle East Technical University, 1984.