Resilient and plastic strain behavior of freezing–thawing mucky clay under subway loading in Shanghai

2014 ◽  
Vol 72 (2) ◽  
pp. 771-787 ◽  
Author(s):  
Yiqun Tang ◽  
Jun Li ◽  
Peng Wan ◽  
Ping Yang
Keyword(s):  
Plastic Strain ◽  
Strain Behavior ◽  
Subway Loading ◽  
Mucky Clay

Accumulated Plastic Strain Behavior of Granite Residual Soil under Cycle Loading

2020 ◽  
Vol 20 (11) ◽  
pp. 04020205
Author(s):  
Yin Wang ◽  
Shixing Zhang ◽  
Song Yin ◽  
Xinyu Liu ◽  
Xianwei Zhang
Keyword(s):  
Plastic Strain ◽  
Residual Soil ◽  
Strain Behavior ◽  
Cycle Loading ◽  
Granite Residual Soil

Experimental Characterization of the Elastic-Plastic Strain Fields at the Crack Tip Due to Cyclic Loading

1994 ◽  
Vol 116 (2) ◽  
pp. 187-192 ◽  
Author(s):  
N. Ranganathan ◽  
K. Jendoubi ◽  
N. Merah
Keyword(s):  
Cyclic Loading ◽  
Plastic Strain ◽  
Crack Tip ◽  
High Strength ◽  
Elastic Plastic ◽  
Strain Behavior ◽  
Linear Elastic ◽  
Elastic Fracture ◽  
Aluminum Alloy 2024

Some mechanical components cease to function satisfactorily, failing either under excessive elastic deformation or extensive plastic yielding. In the case of constrained plastification, the researcher is faced with some difficulties in evaluating plastic and elastic-plastic strain behavior near the crack tip. In the present study local strains are measured by microstrain gages, mounted near the crack tip on CT specimens made from the high strength aluminum alloy 2024-T351 under cyclic loading at constant ΔK. The behavior and the evolution of the elastic-plastic zone are studied as a function of the stress ratio R, the thickness of the specimen and the level of ΔK. The experimental results are compared with those given by numerical and theoretical analyses based on the concepts of linear elastic fracture mechanics (LEFM).

A Cyclic Constitutive Model for Metallic Foam

2014 ◽  
Vol 910 ◽  
pp. 285-288
Author(s):  
Yu Jie Liu ◽  
Bin Qiang
Keyword(s):  
Plastic Strain ◽  
Constitutive Model ◽  
Kinematic Hardening ◽  
Metallic Foam ◽  
Stress Strain ◽  
Matrix Metal ◽  
Strain Behavior ◽  
Proposed Model ◽  
Cyclic Constitutive Model ◽  
Strain Responses

Based on the obtained experimental results, the features of stress-strain behavior of the metallic foam were discussed firstly in this paper. Then, in the framework of 2M1C visco-plasticity constitutive model, a cyclic constitutive model was proposed to simulate the stress-strain responses under monotonic and cyclic compression. In proposed model, plastic strain is divided into two parts, i.e., plastic strain of matrix metal and plastic strain of voids structure, which are associated with relative density. Additionally, a kinematic hardening rule of yield surface center is used to describe ratchetting effect during cyclic loading. The simulated stress-strain responses of aluminum foam are in a good agreement with the experimental ones.

Material Properties Test and Numerical Simulation of Impact for Die Cast Magnesium Alloy

2005 ◽  
Vol 488-489 ◽  
pp. 779-782
Author(s):  
Xiang Guo Zeng ◽  
Qing Wen Wu ◽  
L. Liyuan ◽  
Jing Hong Fan
Keyword(s):  
Residual Stress ◽  
Magnesium Alloy ◽  
Plastic Strain ◽  
Impact Velocity ◽  
Element Analysis ◽  
Strain Behavior ◽  
Die Cast ◽  
Plane Plate ◽  
The Finite Element Analysis ◽  
Cast Magnesium

The poison’s ratio of plane plate samples taken from AM60 magnesium alloy was tested in this paper. A number of strain controlled fatigue experiments were also carried out on MTS to investigate the stress-strain behavior under different temperature conditions. The finite element analysis software ANSYS was employed to simulate impact process of shot blasting. Results indicated that at the specific temperature condition the residual stress and plastic strain increased with impact velocity increasing. At the specific impact velocity, residual stress reduced and plastic strain increased with temperature increment.

Error Bounds on Elastic-Plastic Strain Wave Measurements

1971 ◽  
Vol 93 (4) ◽  
pp. 478-480 ◽  
Author(s):  
J. G. Wagner
Keyword(s):  
Wave Propagation ◽  
Plastic Strain ◽  
Lower Bounds ◽  
Upper And Lower Bounds ◽  
Strain Wave ◽  
One Dimensional ◽  
Elastic Plastic ◽  
Strain Behavior ◽  
Wave Measurements ◽  
Dimensional Wave

Bounds are established on the errors associated with elastic-plastic strain wave measurements involving finite gage lengths. Attention is restricted to the case of one-dimensional wave propagation in a semi-infinite bar. A bi-linear model of the stress-strain behavior provides a means of calculating realistic upper and lower bounds on the relative error of amplitude measurements. Rise time errors are also discussed and illustrated.

Plastic Deformation in Microtomed Sections

1971 ◽  
Vol 29 ◽  
pp. 458-459
Author(s):  
J. Temple Black
Keyword(s):  
Plastic Deformation ◽  
Plastic Strain ◽  
Applied Stress ◽  
Elastic Strain ◽  
High Strain ◽  
Tool Material ◽  
Cutting Edge ◽  
Material Structure ◽  
Geometrical Constraints

The output of the ultramicrotomy process with its high strain levels is dependent upon the input, ie., the nature of the material being machined. Apart from the geometrical constraints offered by the rake and clearance faces of the tool, each material is free to deform in whatever manner necessary to satisfy its material structure and interatomic constraints. Noncrystalline materials appear to survive the process undamaged when observed in the TEM. As has been demonstrated however microtomed plastics do in fact suffer damage to the top and bottom surfaces of the section regardless of the sharpness of the cutting edge or the tool material. The energy required to seperate the section from the block is not easily propogated through the section because the material is amorphous in nature and has no preferred crystalline planes upon which defects can move large distances to relieve the applied stress. Thus, the cutting stresses are supported elastically in the internal or bulk and plastically in the surfaces. The elastic strain can be recovered while the plastic strain is not reversible and will remain in the section after cutting is complete.

Comparison of Substructures Between Uniaxial and Biaxial Deformation in 1100-0 Aluminum

1981 ◽  
Vol 39 ◽  
pp. 52-53
Author(s):  
D. L. Rohr ◽  
S. S. Hecker
Keyword(s):  
Plastic Strain ◽  
Cell Walls ◽  
Room Temperature ◽  
Mechanical Response ◽  
Biaxial Tension ◽  
Initial Deformation ◽  
Uniaxial Deformation ◽  
Biaxial Deformation ◽  
Stress States ◽  
Comprehensive Study

As part of a comprehensive study of microstructural and mechanical response of metals to uniaxial and biaxial deformations, the development of substructure in 1100 A1 has been studied over a range of plastic strain for two stress states.Specimens of 1100 aluminum annealed at 350 C were tested in uniaxial (UT) and balanced biaxial tension (BBT) at room temperature to different strain levels. The biaxial specimens were produced by the in-plane punch stretching technique. Areas of known strain levels were prepared for TEM by lapping followed by jet electropolishing. All specimens were examined in a JEOL 200B run at 150 and 200 kV within 24 to 36 hours after testing.The development of the substructure with deformation is shown in Fig. 1 for both stress states. Initial deformation produces dislocation tangles, which form cell walls by 10% uniaxial deformation, and start to recover to form subgrains by 25%. The results of several hundred measurements of cell/subgrain sizes by a linear intercept technique are presented in Table I.

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