scholarly journals Macroscopic Deformation Behavior of Random Skeletal Structures

2019 ◽  
Vol 68 (11) ◽  
pp. 805-811
Author(s):  
Shoji IMATANI ◽  
Kosuke SAKURAI
Keyword(s):  
Deformation Behavior ◽  
Skeletal Structures ◽  
Macroscopic Deformation

Constrained Deformation of TiAl PST Crystals

2009 ◽  
Vol 1225 ◽  
Author(s):  
Kengo Goto ◽  
Kyosuke Kishida ◽  
Haruyuki Inui
Keyword(s):  
Deformation Behavior ◽  
Lamellar Structure ◽  
Early Stage ◽  
Strain Condition ◽  
Tem Analysis ◽  
Strain Behavior ◽  
Strain Components ◽  
Macroscopic Deformation ◽  
Constrained Deformation ◽  
Deformation Modes

AbstractTiAl polysynthetically twinned (PST) crystals were deformed under plane strain condition, in which the anisotropic macroscopic deformation of PST crystals is restricted with a channel die, in order to clarify the deformation behavior of TiAl/Ti3Al lamellar structure under constraint conditions. TEM analysis of deformation modes together with the Taylor analysis reveals that all TiAl orientation variants deform to yield the relaxed-constraint-type plastic strain, where three shear strain components are not zero for each TiAl variant but are macroscopically compensated to zero by the existence of twin-related TiAl lamellae at the early stage of deformation. The Taylor analysis assuming the relaxed constraint conditions is found to be adaptable for predicting the operative deformation modes in TiAl at the early stage of deformation and also for correlating quantitatively the stress-strain behavior of PST crystals under external constraint with those under the unconstraint condition.

scholarly journals Deformation Behavior of Coarse-Grained Soil as an Embankment Filler under Cyclic Loading

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Zhong-Ming He ◽  
Da Xiang ◽  
Ya-Xin Liu ◽  
Qian-Feng Gao ◽  
Han-Bing Bian
Keyword(s):  
Cyclic Loading ◽  
Deformation Behavior ◽  
Soil Samples ◽  
Coarse Grained ◽  
Triaxial Tests ◽  
Loading Frequency ◽  
Macroscopic Deformation ◽  
Internal Mechanism ◽  
Coarse Grained Soil ◽  
Internal Evolution

This study aims to examine the deformation behavior and internal mechanism of coarse-grained soil as an embankment filler under cyclic loading. Numerical dynamic triaxial tests were performed on coarse-grained soil using the discrete element software PFC3D. The numerical model was verified by comparing the numerical results with the experimental data. Afterward, the changes in the porosity, force chain, and particle movement of coarse-grained soil samples were analyzed, and the mesoscopic deformation behavior of coarse-grained soil under cyclic loading was investigated. The research results show that with the increase of the deviatoric stress amplitude, moisture content, and loading frequency, the deformation of the soil increases and the ability to resist deformation decreases at the same loading cycles. Due to the inhomogeneous distribution of particles with different sizes, the velocity and displacement of the sample vary in different directions, exhibiting mesoscopic anisotropy. The contact force is relatively even in the downward direction while dispersed near the edge of the sample. This means that the particles at the bottom are less affected by loads and the internal evolution of soil samples conforms to its macroscopic deformation behavior during cyclic loading.

scholarly journals Characterization of Mechanical Properties, Macroscopic Deformation Behavior and Microstructure of Functionally Graded 22MnB5 Steel

2021 ◽  
Author(s):  
Emad Scharifi ◽  
Thomas Schade ◽  
Agim Ademaj ◽  
Seyed Vahid Sajadifar ◽  
Ursula Weidig ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Deformation Behavior ◽  
Functionally Graded ◽  
22Mnb5 Steel ◽  
Macroscopic Deformation
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