The Application of RKPM for the Numerical Simulation of Pressure-Sensitive Material using a Cap Plasticity Model

2009 ◽  
Author(s):  
A.R. Khoei ◽  
M. Samimi
Keyword(s):  
Numerical Simulation ◽  
Plasticity Model ◽  
Sensitive Material ◽  
Pressure Sensitive ◽  
Cap Plasticity

scholarly journals Slip lines in front of a round notch tip in a pressure-sensitive material

1994 ◽  
Vol 19 (1) ◽  
pp. 29-38 ◽  
Author(s):  
H.-Y. Jeong ◽  
X.-W. Li ◽  
A.F. Yee ◽  
J. Pan
Keyword(s):  
Sensitive Material ◽  
Slip Lines ◽  
Pressure Sensitive ◽  
Notch Tip

Plasticity Model and Numerical Simulation of Extruded Oilseeds in Closed Cell

2011 ◽  
Vol 304 ◽  
pp. 235-240
Author(s):  
Xiao Zheng ◽  
Ya Xin Zhang ◽  
Guo Xiang Lin ◽  
Zhi Xian Sun
Keyword(s):  
Numerical Simulation ◽  
Constitutive Equations ◽  
Theoretical Basis ◽  
Inverse Method ◽  
Yield Criterion ◽  
Model Parameters ◽  
Plasticity Model ◽  
Power Curve ◽  
Experimental Stress ◽  
Closed Cell

By using of Kuhn`s yield criterion, plasticity constitutive equations of extruded oilseeds in a closed cylinderical cell were developed. The model parameters were identified from experimental stress—strain using an inverse method. The maximum relative deviations between the measured and the simulated value of soybean and cottonseed are 8.5% and 5.1% respectively, and the average relative deviations are 4.9% and 3.8% respectively. The results of numerical simulation for confined pressing of granular soybeans and cottonseeds in the closed cylinderical cell indicated the following facts that granular soybeans and cottonseeds conform to the model of three power curve, the plasticity constitutive equations can describe the plastic deformation for extruded soybean and cottonseed, and Kuhn`s yield criterion can be used as theoretical basis for plasticity model of granular soybeans and cottonseeds.

Effect of Cohesive Zone Size on Peeling of Heterogeneous Adhesive Tape

2018 ◽  
Vol 85 (12) ◽  
Author(s):  
L. Avellar ◽  
T. Reese ◽  
K. Bhattacharya ◽  
G. Ravichandran
Keyword(s):  
Numerical Simulation ◽  
Cohesive Zone ◽  
Elastic Stiffness ◽  
Adhesive Tape ◽  
Zone Size ◽  
Force Enhancement ◽  
Rigid Substrate ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive ◽  
Peel Force

The interaction between the cohesive zone and the elastic stiffness heterogeneity in the peeling of an adhesive tape from a rigid substrate is examined experimentally and with finite element simulations. It is established in the literature that elastic stiffness heterogeneities can greatly enhance the force required to peel a tape without changing the properties of the interface. However, much of these concern brittle materials where the cohesive zone is limited in size. This paper reports the results of peeling experiments performed on pressure-sensitive adhesive tapes with both an elastic stiffness heterogeneity and a substantial cohesive zone. These experiments show muted enhancement in the peeling force and suggest that the cohesive zone acts to smooth out the effect of the discontinuity at the edge of the elastic stiffness heterogeneities, suppressing their effect on peel force enhancement. This mechanism is examined through numerical simulation which confirms that the peel force enhancement depends on the strength of the adhesive and the size of the cohesive zone.

Numerical Simulation of SHPB Experiment and Analysis on Stress Wave

2011 ◽  
Vol 94-96 ◽  
pp. 397-401
Author(s):  
Ru Heng Wang ◽  
Hua Chuan Yao ◽  
Bin Jia ◽  
Lin Wang
Keyword(s):  
Numerical Simulation ◽  
Constitutive Model ◽  
Stress Wave ◽  
Dynamic Characteristics ◽  
Room Temperature ◽  
Stress Waves ◽  
Sensitive Material ◽  
Stress Strain ◽  
Experiment System ◽  
Time Stress

Concrete is a typical kind of rate sensitive material. In this paper, the concrete specimens were tested in the SHPB experiment system. Based on H-J-C constitutive model, the SHPB experiment was simulated by LS-DANY. The stress-strain curves which were gat from numerical simulation in the LS-DANY were compared with the stress-strain curves which were gat from SHPB. The results showed that the H-J-C constitutive could simulate the dynamic characteristics of concrete both under room temperature. The result also showed that the concrete was strain rate sensitive. Based on the numerical simulation, the stress wave in the SHPB system was studied. The research of the numerical simulation showed that the stress waves tended to become stable after several oscillations in the incident bar. At the same time, stress wave of elements in r=0 (The distance of elements to the axis was 0) were bigger than the stress wave of r=0.5R (The distance to the axis was 0.5R) and r=R (The distance to the axis was R).

Sign in / Sign up

Export Citation Format

Share Document