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Full-Text Articles in Engineering
Large Deformation Behavior Of Saturated Sand With Initial Static Shear In Cyclic Torsional Shear Tests, Gabriele Chiaro, Takeshi Sato, Junichi Koseki
Large Deformation Behavior Of Saturated Sand With Initial Static Shear In Cyclic Torsional Shear Tests, Gabriele Chiaro, Takeshi Sato, Junichi Koseki
Faculty of Engineering - Papers (Archive)
Liquefaction-induced extremely large deformations have been observed on gentle slope of sand, following the 1964 Niigata and 1983 Nihonkai-Chubu earthquakes (Hamada et al., 1994). Although the gradient of slopes was merely of some percents, their lateral spreading achieved several meters. Due to liquefaction, flow of slope can occur when the mobilized shear stress of soil in its liquefied state exceeds the shear stress required for the static equilibrium of soil mass. Once deformations produced by flow liquefaction are triggered, they may become extremely large depending on the acting static shear stress. Even though the behavior of saturated sand is known …
In Situ Study Of Dynamic Recrystallization And Hot Deformation Behavior Of A Multiphase Titanium Aluminide Alloy, Klaus-Dieter Liss, Thomas Schmoelzer, Kun Yan, Mark H. Reid, Matthew Peel, Rian J. Dippenaar, Helmut Clemens
In Situ Study Of Dynamic Recrystallization And Hot Deformation Behavior Of A Multiphase Titanium Aluminide Alloy, Klaus-Dieter Liss, Thomas Schmoelzer, Kun Yan, Mark H. Reid, Matthew Peel, Rian J. Dippenaar, Helmut Clemens
Faculty of Engineering - Papers (Archive)
Hot-compression tests were conducted in a high-energy synchrotron x-ray beam to study in situ and in real time microstructural changes in the bulk of a β-solidifying titanium aluminide alloy. The occupancy and spottiness of the diffraction rings have been evaluated in order to access grain growth and refinement, orientation relationships, subgrain formation, dynamic recovery, and dynamic recrystallization, as well as phase transformations. This method has been applied to an alloy consisting of two coexisting phases at high temperature and it was found that the bcc β-phase recrystallizes dynamically, much faster than the hcp α-phase, which deforms predominantly …
Cyclic Deformation Of Advanced High-Strength Steels: Mechanical Behavior And Microstructural Analysis, Timothy B. Hilditch, Ilana B. Timokhina, Leigh T. Robertson, E V. Pereloma, Peter D. Hodgson
Cyclic Deformation Of Advanced High-Strength Steels: Mechanical Behavior And Microstructural Analysis, Timothy B. Hilditch, Ilana B. Timokhina, Leigh T. Robertson, E V. Pereloma, Peter D. Hodgson
Faculty of Engineering - Papers (Archive)
The fatigue properties of multiphase steels are an important consideration in the automotive industry. The different microstructural phases present in these steels can influence the strain life and cyclic stabilized strength of the material due to the way in which these phases accommodate the applied cyclic strain. Fully reversed strain-controlled low-cycle fatigue tests have been used to determine the mechanical fatigue performance of a dual-phase (DP) 590 and transformation-induced plasticity (TRIP) 780 steel, with transmission electron microscopy (TEM) used to examine the deformed microstructures. It is shown that the higher strain life and cyclic stabilized strength of the TRIP steel …
Behavior Of Cemented Soft Clays In Undrained Situations, Suksun Horpibulsuk, Jirayut Suebsuk, Martin D. Liu
Behavior Of Cemented Soft Clays In Undrained Situations, Suksun Horpibulsuk, Jirayut Suebsuk, Martin D. Liu
Faculty of Engineering - Papers (Archive)
In this paper, a constitutive model for cemented clay is introduced. This model is designated as "Modified Structured Cam Clay (MSCC) model". In the model, the influence of cementation structure is incorporated into effective stress concept, yield function, hardening rule and plastic potential function to describe the mechanical behavior of cemented clay during strain-hardening and softening. The methodology of modeling the shear behavior of structured clay is simple, which is the same way as that of the other models of the Cam Clay family. The capability of the MSCC model is verified by comparing the simulated undrained shear response of …