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

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.

A noncontacting transducer for measurement of lateral strains

1979 ◽  
Vol 16 (2) ◽  
pp. 409-411 ◽  
Author(s):  
Mozammel H. Khan ◽  
Dean L. Hoag
Keyword(s):  
Soil Sample ◽  
Triaxial Test ◽  
Deformation Behavior ◽  
Soil Surface ◽  
Technical Note ◽  
Principal Stresses ◽  
A New Technique ◽  
Small Deformations ◽  
Principal Strains ◽  
Anisotropic Deformation

In order to study the anisotropic deformation behavior of soils in the triaxial test, three principal strains have to be measured accurately while the soil sample is subjected to three independent principal stresses. However, it appears that the technique of measuring small deformations of anisotropic soils has received relatively little attention. The authors have developed a new technique to measure the lateral strains, which does not require any contact of the transducer element with the soil surface. The details of the apparatus are presented in this technical note.

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