The poynting effect in soft composite materials

The Poynting effect in soft homogenous cylinders under pure torsion as well as the inversion and perversion of soft homogenous cylinders under pure axial loading are studied. In the context of this project, the Poynting effect is described as the tendency for the cylinder to elongate or contract in...

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Main Author: Tan, Jasmine Wei Ling
Other Authors: Wu Mao See
Format: Final Year Project
Language:English
Published: 2015
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Online Access:http://hdl.handle.net/10356/65746
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-657462023-03-04T18:50:57Z The poynting effect in soft composite materials Tan, Jasmine Wei Ling Wu Mao See School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics The Poynting effect in soft homogenous cylinders under pure torsion as well as the inversion and perversion of soft homogenous cylinders under pure axial loading are studied. In the context of this project, the Poynting effect is described as the tendency for the cylinder to elongate or contract in axial direction when torsion is applied. Inversion refers to the point at which the elongation of the cylinder in the axial direct reaches a maximum point when under pure axial loading. Perversion refers to the point at which a change from elongation to contraction in the axial direction occurs under pure axial loading. The net change in the homogenous cylinder under torsion due to the Poynting is also studied. The project focuses on the theoretical aspects of the cylinder under pure torsion and pure axial loading through the application of second-order elasticity and Lagrangian equilibrium equations. Soft materials in the human body can exhibit the Poynting effect as well as inversion and perversion. Thus, soft material within cardiac papillary muscle analyzed along with soft gels and metals. Attention is given to the second-order and third order elastic constants that give rise to contraction in the axial direction or a negative Poynting effect when under torsion. It is found that a negative Poynting effect is typically seen in material with positive third-order elastic constants. Results also suggest a correlation between the negative Poynting effect and the inversion and perversion of the cylinder under pure torsion and pure axial loading respectively. It is also found that net change volume of the homogenous cylinder under pure torsion relates to the radial displacement associated with the Poynting effect. Bachelor of Engineering (Mechanical Engineering) 2015-12-11T03:30:13Z 2015-12-11T03:30:13Z 2015 2015 Final Year Project (FYP) http://hdl.handle.net/10356/65746 en Nanyang Technological University 86 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
spellingShingle DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
Tan, Jasmine Wei Ling
The poynting effect in soft composite materials
description The Poynting effect in soft homogenous cylinders under pure torsion as well as the inversion and perversion of soft homogenous cylinders under pure axial loading are studied. In the context of this project, the Poynting effect is described as the tendency for the cylinder to elongate or contract in axial direction when torsion is applied. Inversion refers to the point at which the elongation of the cylinder in the axial direct reaches a maximum point when under pure axial loading. Perversion refers to the point at which a change from elongation to contraction in the axial direction occurs under pure axial loading. The net change in the homogenous cylinder under torsion due to the Poynting is also studied. The project focuses on the theoretical aspects of the cylinder under pure torsion and pure axial loading through the application of second-order elasticity and Lagrangian equilibrium equations. Soft materials in the human body can exhibit the Poynting effect as well as inversion and perversion. Thus, soft material within cardiac papillary muscle analyzed along with soft gels and metals. Attention is given to the second-order and third order elastic constants that give rise to contraction in the axial direction or a negative Poynting effect when under torsion. It is found that a negative Poynting effect is typically seen in material with positive third-order elastic constants. Results also suggest a correlation between the negative Poynting effect and the inversion and perversion of the cylinder under pure torsion and pure axial loading respectively. It is also found that net change volume of the homogenous cylinder under pure torsion relates to the radial displacement associated with the Poynting effect.
author2 Wu Mao See
author_facet Wu Mao See
Tan, Jasmine Wei Ling
format Final Year Project
author Tan, Jasmine Wei Ling
author_sort Tan, Jasmine Wei Ling
title The poynting effect in soft composite materials
title_short The poynting effect in soft composite materials
title_full The poynting effect in soft composite materials
title_fullStr The poynting effect in soft composite materials
title_full_unstemmed The poynting effect in soft composite materials
title_sort poynting effect in soft composite materials
publishDate 2015
url http://hdl.handle.net/10356/65746
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