NDLI: Stress analysis of two-dimensional cellular materials with thick cell struts

Content Provider	Springer Nature Link
Author	Lim, Dohyung Kim, Han Sung Kim, Young Ho Kim, Yoon Hyuk Al Hassani, S. T. S.
Copyright Year	2008
Abstract	Finite element analyses (FEA) were performed to thoroughly validate the collapse criteria of cellular materials presented in our previous companion paper. The maximum stress (von-Mises stress) on the cell strut surface and the plastic collapse stress were computed for two-dimensional (2D) cellular materials with thick cell struts. The results from the FEA were compared with those from theoretical criteria of authors. The FEA results were in good agreement with the theoretical results. The results indicate that when bending moment, axial and shear forces are considered, the maximum stress on the strut surface gives significantly different values in the tensile and compressive parts of the cell wall as well as in the two loading directions. Therefore, for the initial yielding of ductile cellular materials and the fracture of brittle cellular materials, in which the maximum stress on the strut surface is evaluated, it is necessary to consider not only the bending moment but also axial and shear forces. In addition, this study shows that for regular cellular materials with the identical strut geometry for all struts, the initial yielding and the plastic collapse under a biaxial state of stress occur not only in the inclined cell struts but also in the vertical struts. These FEA results support the theoretical conclusion of our previous companion paper that the anisotropic 2D cellular material has a truncated yield surface not only on the compressive quadrant but also on the tensile quadrant.
Starting Page	835
Ending Page	845
Page Count	11
File Format	PDF
ISSN	1738494X
Journal	Journal of Mechanical Science and Technology
Volume Number	22
Issue Number	5
e-ISSN	19763824
Language	English
Publisher	Korean Society of Mechanical Engineers
Publisher Date	2008-06-07
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cellular materials Thick cell struts Collapse criteria von-Mises stress Truncated yield surface Engineering Thermodynamics, Transport Phenomena Engineering Fluid Dynamics Power Engineering Industrial and Production Engineering Vibration, Dynamical Systems, Control Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Mechanical Engineering

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