Strain Path Research of a Hypoplastic Constitutive Model for Cohesionless Soil

2006 ◽  
Author(s):  
B. L. Xiong ◽  
L. T. Shao
Keyword(s):  
Constitutive Model ◽  
Strain Path ◽  
Cohesionless Soil ◽  
Hypoplastic Constitutive Model

scholarly journals Computational Excavation Analysis of a Single Cutting Tool using a Hypoplastic Constitutive Model

PAMM ◽  
2016 ◽  
Vol 16 (1) ◽  
pp. 369-370 ◽  
Author(s):  
Abdiel Ramon Leon ◽  
Thai Son Dang ◽  
Günther Meschke
Keyword(s):  
Constitutive Model ◽  
Cutting Tool ◽  
Hypoplastic Constitutive Model

Modeling Compression and Tension Reloads in Copper Prestrained by Rolling

2007 ◽  
Vol 539-543 ◽  
pp. 3383-3388 ◽  
Author(s):  
Irene J. Beyerlein ◽  
Carlos N. Tomé
Keyword(s):  
Flow Stress ◽  
Constitutive Model ◽  
Single Crystal ◽  
Strain Path ◽  
Transverse Direction ◽  
Flow Curves ◽  
Hardening Law ◽  
Slip Activity ◽  
Directional Anisotropy ◽  
Planar Dislocation

A constitutive model is applied to predict the flow stress of an fcc material up to 30% straining after rolling to reductions of 19%, 39%, and 50%. The model makes use of a single crystal hardening law which appreciates the directional anisotropy produced by planar dislocation boundaries, Bauschinger effects, and dissolution of substructure by new slip activity invoked by changes in strain path. Anisotropy between axial testing in the rolling (RD) versus the transverse direction (TD) and a tensioncompression stress- differential in RD are predicted. These and other characteristics of the flow curves are linked to changes in slip activity when deformation transitions from rolling to axial testing.

Amelioration of Wolffersdorff Hypoplastic Constitutive Model Considering Intergranular Strain Tensor

2014 ◽  
Vol 638-640 ◽  
pp. 355-359
Author(s):  
Bao Lin Xiong ◽  
Chun Jiao Lu
Keyword(s):  
Constitutive Model ◽  
Pore Water ◽  
Cyclic Load ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Strain Tensor ◽  
Excess Pore Water Pressure ◽  
Intergranular Strain ◽  
Hypoplastic Constitutive Model ◽  
Excess Pore

Under cyclic load, the major shortcoming–ratcheting is produced in Wolffersdorff hypoplastic constitutive model. For eliminating ratcheting, Wolffersdorff hypoplastic model is ameliorated based on intergranular strain tensor. The added parameters in ameliorated model are determined by optimization method. Under cyclic load of triaxial consolidation undrained condition, the mechanics features of sand are described by the ameliorated Wolffersdorff hypoplastic constitutive model. Preliminary result shows that with increasing times of cyclic load excess pore water pressure is increased gradually and effective stress is reduced gradually. When effective is reduced to zero, the liquefaction happens. So in many projects, excess pore water pressure must dissipate by means of some measures. The sand liquefaction under the dynamic load is avoided.

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