Skeleton-and-bubble model of polyether-polyurethane elastic open-cell foams for finite element analysis at large deformations

2013 ◽  
Vol 61 (3) ◽  
pp. 886-911 ◽  
Author(s):  
Tapan Sabuwala ◽  
Gustavo Gioia
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Large Deformations ◽  
Element Analysis ◽  
Open Cell ◽  
Open Cell Foams

scholarly journals Elastic Properties of Open-Cell Foams with Tetrakaidecahedral Cells Using Finite Element Analysis

AIAA Journal ◽  
2010 ◽  
Vol 48 (4) ◽  
pp. 818-828 ◽  
Author(s):  
Prasanna Thiyagasundaram ◽  
Bhavani V. Sankar ◽  
Nagaraj K. Arakere
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Elastic Properties ◽  
Element Analysis ◽  
Open Cell ◽  
Open Cell Foams

Long Wavelength Buckling of Cubic Open-Cell Foams Subjected to Uniaxial Compression

2007 ◽  
Vol 353-358 ◽  
pp. 583-586 ◽  
Author(s):  
Dai Okumura ◽  
Atsushi Okada ◽  
Nobutada Ohno
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Uniaxial Compression ◽  
Elastic Buckling ◽  
Element Analysis ◽  
Open Cell ◽  
Buckling Strength ◽  
Long Wavelength ◽  
Onset Condition ◽  
Open Cell Foams

In this study, the elastic buckling strength of cubic open-cell foams subjected to uniaxial compression is investigated using the homogenization framework developed by the present authors (Ohno et al., JMPS 2002; Okumura et al., JMPS 2004). First of all, based on the framework, the microscopic bifurcation and macroscopic instability of cubic open-cell foams are numerically analyzed by performing finite element analysis. It is thus shown that long wavelength buckling is the primary mode and occurs just after the onset of macroscopic instability. Then, a solution for predicting the stress of long wavelength buckling is analytically derived from the onset condition of macroscopic instability. The validity of this analytical solution is demonstrated by the finite element results.

Long Wave-Length Buckling of Periodic Open-Cell Foams Subjected to Uniaxial Compression

2007 ◽  
Vol 345-346 ◽  
pp. 81-84
Author(s):  
Dai Okumura ◽  
Atsushi Okada ◽  
Nobutada Ohno
Keyword(s):  
Finite Element ◽  
Uniaxial Compression ◽  
Wave Length ◽  
Elastic Buckling ◽  
Element Analysis ◽  
Open Cell ◽  
Long Wavelength ◽  
Onset Condition ◽  
Long Wave ◽  
Open Cell Foams

In this study, the elastic buckling strength of cubic open-cell foams subjected to uniaxial compression is investigated using the homogenization framework developed by the present authors (Ohno et al., JMPS 2002; Okumura et al., JMPS 2004). First of all, based on the framework, the microscopic bifurcation and macroscopic instability of cubic open-cell foams are numerically analyzed by performing finite element analysis. It is thus shown that long wavelength buckling is the primary mode and occurs just after the onset of macroscopic instability. Then, a solution for predicting the stress of long wavelength buckling is analytically derived from the onset condition of macroscopic instability. The validity of this analytical solution is demonstrated by the finite element results.

Finite Element Analysis of the Crimping Process of the Piston-slipper Component in Hydraulic Pumps

1999 ◽  
Vol 122 (3) ◽  
pp. 337-342 ◽  
Author(s):  
Y. Yao ◽  
A. Z. Qamhiyah ◽  
X. D. Fang
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Large Deformations ◽  
Manufacturing Processes ◽  
Hydraulic Pump ◽  
Element Analysis ◽  
Die Geometry ◽  
Simulation Procedure ◽  
Finite Element Package

Hydraulic pumps and motors are widely used in mobile equipment for construction, mining and agriculture. The piston-slipper component is one of the critical parts of a hydraulic pump. A crimping process is used for connecting the piston to the slipper component. Like most of the manufacturing processes that involve large deformations, high stresses are created in the slipper and piston during the crimping process. This paper presents a finite element method for the analysis of the stresses, strains, and forces associated with the crimping process. This method can be used in the optimization of the piston, slipper and die designs. The commercial finite element package ANSYS was used to simulate the crimping process. The simulation procedure is used to obtain a better understanding of the effect of the die geometry on the crimping process. [S1050-0472(00)00303-2]

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