Planar Ideal Plastic Flows

2019 ◽  
pp. 1-6
Author(s):  
Sergei Alexandrov
Keyword(s):  
Ideal Plastic

Strength and deformation of frozen saturated sand at −30 °C

1982 ◽  
Vol 19 (1) ◽  
pp. 104-107 ◽  
Author(s):  
V. R. Parameswaran ◽  
M. Roy
Keyword(s):  
Strain Rate ◽  
Power Law ◽  
Quartz Sand ◽  
Peak Strength ◽  
Strain Rates ◽  
Saturated Sand ◽  
Ideal Plastic ◽  
Strength And Deformation ◽  
Power Law Equation

Frozen saturated quartz sand containing 20% moisture by weight, when deformed at −30 °C at various strain rates, showed various modes of behaviour such as visco-plastic, almost ideal plastic, and brittle with little plasticity with increasing order of strain rate. The values of peak strength observed for strain rates between 5 × 10−7 and 6 × 10−3 s−1 were in the range 15–42 MPa, stress being related to strain rate by a power-law equation.

scholarly journals Irreversible thermodynamics of ideal plastic deformation

2018 ◽  
Vol 5 (1) ◽  
pp. 1496613
Author(s):  
Keiichi Ogawa ◽  
Tetsu Ichitsubo ◽  
Shunya Ishioka ◽  
Rajeev Ahuja
Keyword(s):  
Plastic Deformation ◽  
Irreversible Thermodynamics ◽  
Ideal Plastic

scholarly journals Ploughing of subglacial sediment

1994 ◽  
Vol 40 (134) ◽  
pp. 97-106 ◽  
Author(s):  
URS H. Fischer ◽  
Garry K. C. Clarke
Keyword(s):  
Shear Stress ◽  
Effective Viscosity ◽  
Basal Layer ◽  
Shear Resistance ◽  
Yukon Territory ◽  
Rheological Parameters ◽  
Ideal Plastic ◽  
New Instrument ◽  
Newtonian Viscous Fluid ◽  
Basal Shear

AbstractMechanical conditions at the base of Trapridge Glacier, Yukon Territory, were investigated using a “ploughmeter”. We describe the physical characteristics and the theory of this new instrument as well as its operation. Observational results reveal variations in ploughmeter response that might be attributed to spatial variability in subglacial processes or spatial variation in sediment granulometry. Quantitative analysis of the interaction of the ploughmeter with the basal layer yields estimates of rheological parameters. If the sediment is assumed to behave as a Newtonian viscous fluid, the estimated effective viscosity is 3.0 × 109−3.1 × 1010Pas; if it is assumed to behave as an ideal plastic solid, the estimated yield strength is 48–57 kPa. In both cases, the estimated shear resistance of subglacial material is comparable to but somewhat less than that required to balance fully the applied basal shear stress.

Fracture prediction in steady ideal plastic flows

2003 ◽  
Vol 163 (3-4) ◽  
pp. 127-138 ◽  
Author(s):  
S. Alexandrov
Keyword(s):  
Fracture Prediction ◽  
Ideal Plastic

Mechanical Behavior of Fracture Filled with Variable Medium

2012 ◽  
Vol 472-475 ◽  
pp. 2203-2206
Author(s):  
Jin Gang Chen ◽  
Na Chen ◽  
Jun Li Yang
Keyword(s):  
Mechanical Behavior ◽  
Laboratory Experiments ◽  
Behavior Model ◽  
Flow State ◽  
Linear Elastic ◽  
Ideal Plastic ◽  
Strain Data ◽  
Variable Medium ◽  
Normal Compression ◽  
The Ideal

Filled fracture is a fracture in which sands or other materials occupy some void spaces. This study uses well-controlled laboratory experiments to investigate mechanical behavior of fracture filled with variable medium by means of normal compression and lateral restraint. A large number of stress-strain data are obtained. The mechanical behavior of filled fracture with variable medium can be divided into three phases: rheological phase, compaction phase and linear elastic phase. At the beginning of the experiment, the filled fracture is in the ideal plastic flow state. The overall strength of filled fracture increase with finite deformation and normal stress increasing, and show linear elastic characters. Based on the experiment results and characteristics, the mechanical behavior model of fracture filled with variable medium is constructed, and also its mechanism is analyzed.

Sign in / Sign up

Export Citation Format

Share Document