NDLI: Non-Contact Technique for Characterizing Full-Field Surface Deformation of Shape Memory Polymers

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Mcclung, A. J. W. Tandon, G. P. Goecke, K. E. Baur, J. W.
Copyright Year	2010
Abstract	Thermally-actuated shape memory polymers (SMPs) typically display two phases separated by the glass transition temperature (Tg). At temperatures well below the Tg, the polymer exhibits a relatively high elastic modulus. Well above the Tg the elastic modulus drops by several orders of magnitude. In this high temperature region, SMP materials can achieve strain levels well above 100 %. The complex behavior of SMPs (stiffnesses dropping to the order of 1 GPa and extremely high strain levels) precludes the use of traditional strain gages and low-contact force extensometers. The present study presents a detailed expansion of state-of-the-art thermomechanical testing techniques used to characterize the material behavior of SMPs. An MTS environmental chamber with an observation window allows for non-contact optical measurements during testing. A laser extensometer is used for measurement and active control of axial strain. The upper limit on the strain rate capability of the laser extensometer is established. In addition, the photographic strain measurement method known as digital image correlation (DIC) is incorporated, allowing for full field measurement of axial and transverse strains of SMPs over a range of temperatures and strain rates. The strain measurements of the DIC and laser extensometer are compared to each other as well as to clip-on extensometers and strain gages. The comparisons provide insight into the limitations of the traditional strain measurement systems. A series of tensile tests are performed on a commercial SMP from 25 °C up to temperatures of 130 °C and strain levels above 100 %. The laser extensometer provides a robust method for controlling the strain in the gage section of the samples. In addition, results show that the full field measurements of both the axial and the transverse strain are essential for characterizing the constitutive response of SMPs at room and elevated temperatures.
Sponsorship	Aerospace Division
Starting Page	79
Ending Page	88
Page Count	10
File Format	PDF
ISBN	9780791844151
DOI	10.1115/SMASIS2010-3679
e-ISBN	9780791838860
Volume Number	ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1
Conference Proceedings	ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
Language	English
Publisher Date	2010-09-28
Publisher Place	Philadelphia, Pennsylvania, USA
Access Restriction	Subscribed
Subject Keyword	Elastic moduli Temperature Strain gages High temperature Gages Thermomechanics Glass transition Photography Optical measurement Shape memory polymers Lasers Surface deformation Strain measurement Polymers Testing
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Libarray of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

The Strain Rate- and Temperature-Dependent Mechanical Behavior of Veriflex-E in Tension

Anisotropic Bistable Electroactive Polymers: Large Strain Actuation of Shape Memory Polymers

Novel Bismaleimide-Based Shape Memory Polymers: Comparison to Commercial Shape Memory Polymers

Shape Memory Polymers: Energy Method Superposition Constitutive Modeling

Shape Memory Polymers: Viscoelastic Thermomechanical Constitutive Modeling

A Large-Deformation Theory for Thermally-Actuated Shape-Memory Polymers and its Application

Two-way shape memory effect of a tinihf high temperature shape memory alloy (2003).

Rheological Modeling for Shape-Memory Thermoplastic Polymers

Theoretical and Experimental Investigation of Shape Memory Polymers Programmed below Glass Transition Temperature

Non-Contact Technique for Characterizing Full-Field Surface Deformation of Shape Memory Polymers

Similar Documents

The Strain Rate- and Temperature-Dependent Mechanical Behavior of Veriflex-E in Tension

Anisotropic Bistable Electroactive Polymers: Large Strain Actuation of Shape Memory Polymers

Novel Bismaleimide-Based Shape Memory Polymers: Comparison to Commercial Shape Memory Polymers

Shape Memory Polymers: Energy Method Superposition Constitutive Modeling

Shape Memory Polymers: Viscoelastic Thermomechanical Constitutive Modeling

A Large-Deformation Theory for Thermally-Actuated Shape-Memory Polymers and its Application

Two-way shape memory effect of a tinihf high temperature shape memory alloy (2003).

Rheological Modeling for Shape-Memory Thermoplastic Polymers

Theoretical and Experimental Investigation of Shape Memory Polymers Programmed below Glass Transition Temperature

Non-Contact Technique for Characterizing Full-Field Surface Deformation of Shape Memory Polymers