Experimental and numerical investigations of the anisotropic deformation behavior of low-density polymeric foams

2017 ◽  
Vol 63 ◽  
pp. 605-613 ◽  
Author(s):  
Shugo Fushimi ◽  
Takumi Nagakura ◽  
Akio Yonezu
Keyword(s):  
Deformation Behavior ◽  
Low Density ◽  
Polymeric Foams ◽  
Numerical Investigations ◽  
Anisotropic Deformation

High-density liquid-like component facilitates plastic flow in a model amorphous silicon system

2003 ◽  
Vol 806 ◽  
Author(s):  
Michael J. Demkowicz ◽  
Ali S. Argon
Keyword(s):  
Molecular Dynamics ◽  
Plastic Flow ◽  
Deformation Behavior ◽  
Strain Softening ◽  
Low Density ◽  
Unstressed State ◽  
Plastic Deformation Behavior ◽  
Silicon System ◽  
Amorphous Si ◽  
Dynamics Simulations

ABSTRACTMolecular dynamics simulations show that plastic deformation behavior of model Stillinger-Weber amorphous Si is very sensitive to the density of the initial unstressed state. Low-density systems exhibit a pronounced yield phenomenon, strain softening, and a dramatic drop in pressure during deformation at constant volume. This behavior is explained by the interplay in every system of the prevailing solid-like and liquid-like components, with the latter being denser and more amenable to plastic flow.

Deformation Behavior of Fiber-Reinforced Hydrogel Structures

2019 ◽  
Vol 19 (03) ◽  
pp. 1950032 ◽  
Author(s):  
Yu Zhou ◽  
Jianying Hu ◽  
Zishun Liu
Keyword(s):  
Free Energy ◽  
Deformation Behavior ◽  
Free Energy Function ◽  
Fiber Reinforced ◽  
Energy Component ◽  
Complex Deformation ◽  
Finite Element Software ◽  
Buckling Behavior ◽  
Proposed Model ◽  
Anisotropic Deformation

Proposed herein is a new theory for the anisotropic deformation of fiber-reinforced hydrogels. This new model takes into account the real fabrication of the fiber-reinforced hydrogels, in which the hydrogels are polymerized with fibers and polymer solutions. The new free energy function is established by adding the anisotropic free energy component contributed by fibers into the Flory–Rehner model. The proposed model is implemented through a user-defined material subroutine (UMAT) in the finite element software package ABAQUS. In particular, the consistent tangent modulus is derived in detail. Then, several illustrative examples with analytical and numerical results are demonstrated. In order to study deformation behavior of natural materials, we design some simple bilayer structures to mimic the opening of seedpods and the closure of flowers, in which the buckling behavior of fiber-reinforced hydrogels have been demonstrated. We hope that the proposed approach may help to study more complex deformation phenomena in hydrogel structures.

Stress-relaxation viewpoint to study the room-temperature cyclic deformation behavior of a low-density steel

2020 ◽  
Vol 139 ◽  
pp. 105673 ◽  
Author(s):  
A. Moshiri ◽  
A. Zarei-Hanzaki ◽  
A.S. Anoushe ◽  
H.R. Abedi ◽  
B. Mirshekari ◽  
...  
Keyword(s):  
Stress Relaxation ◽  
Cyclic Deformation ◽  
Deformation Behavior ◽  
Room Temperature ◽  
Low Density

Low-density microporous polymeric foams measurement with digital microscopic image plane holography

2007 ◽  
Author(s):  
Qieni Lü ◽  
Baozhen Ge ◽  
Yongjie Wei ◽  
Qingguo Tian ◽  
Xiaojie Li ◽  
...  
Keyword(s):  
Image Plane ◽  
Low Density ◽  
Microscopic Image ◽  
Polymeric Foams

scholarly journals Anisotropic deformation behavior of 112-0, 101-0 and 0001-textured nanocrystalline titanium

2022 ◽  
Vol 32 ◽  
pp. 105099
Author(s):  
Le Chang ◽  
Zhilin Tao ◽  
Sisheng Yang ◽  
Xinran Liu ◽  
Changyu Zhou
Keyword(s):  
Deformation Behavior ◽  
Nanocrystalline Titanium ◽  
Anisotropic Deformation
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