Shape memory polymers
On modeling shape memory polymers as elastic two-phase composite materials
... et al. [4] developed a four-element variation of a viscoelastic rheological model, the numerical integration of which was detailed by Bhattacharyya and Tobushi [5], and that was extended to nonlinear effects by Tobushi ...
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A torsion test for the study of the large deformation recovery of shape memory polymers
... the shape fixity and shape recovery of shape memory polymers at large ...of shape recovery for samples submitted to large deformations at moderate strains that are more likely ...
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Thermo-reversible reactions for the preparation of smart materials: recyclable covalently-crosslinked shape memory polymers
... Semi-crystalline shape memory polymers (SMPs) used for the preparation of advanced stents or smart surgical sutures may be obtained either from the chemical crosslinking of semi-crystalline ...
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Design and characterization of thermally-induced shape memory polymers
... reversible shape memory polymers (2W-SMPs) are highly desirable for many ...reversible shape memory effects under both stress-free and stress ...
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Thermo- and photo-reversible reactions for the preparation of smart materials : smart rubbers and recyclable shape memory polymers
... excellent shape memory ...moieties. Shape memory properties have been assessed by cyclic tensile thermomecanical measurement and virtually complete fixity and total recovery were recorded in ...
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Assessment and preliminary model development of shape memory polymers mechanical counter pressure space suits
... This thesis work is to explore the development of a shape memory polymer (SMP) MCP suit by outlining the design requirements of a space qualified MCP suit, underst[r] ...
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Review and Perspectives: Shape Memory Alloy Composite Systems
... magnetic shape mem- ory alloys (MSMAs) [211, 359], and shape memory polymers (SMPs) ...contains shape memory alloy fibers (or films) in such a way that the material can be ...
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Thermoreversibly cross-linked poly-ε-caprolactones for shape memory materials
... existing polymers raises tremendous interest in macromolecular chemistry with the purpose to develop new smart ...them, shape memory polymers (SMPs) are ...
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Some New Concepts of Shape Memory Effect of Polymers
... to shape memory polymers are ...initial shape. It was shown that, this partial shape memory effect could be improved by successive cycles of shape memory ...
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Multi-scale Analysis of the Fatigue of Shape Memory Alloys
... the shape memory effect [70, 71, and among many others]; recently, the interaction between events of the martensitic phase transformation (such as the A-M interface motion, twinning, Martensite ...
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THEORETICAL AND NUMERICAL ANALYSIS OF FRACTURE OF SHAPE MEMORY ALLOYS
... of shape memory alloys using the constitutive model of Sun and Hwang [15], considering non-proportional loading for forward and reverse ...the shape of the transformation zone changes with a long ...
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A comprehensive approach for fatigue analysis of shape memory alloys
... For Shape Memory Alloys under pseudoelastic loading, we identified four issues that must be taken into account in order to get an accurate evaluation of the fatigue lifetime of a SMA struc- ...by ...
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A thermomechanical Hencky strain constitutive model for shape memory alloys
... complete shape recovery is achieved upon unloading, a smooth response is observed at the initiation and completion of phase transformation, and the elastic modulus is found to depend on phase ...
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Constitutive modeling of Cu-Al-Ni shape memory alloys
... While the free-energy was valid for a small range of temperatures around the trans- formation temperature, the mechanical analog model used to derive the kinetic [r] ...
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Designing mechanisms with shape memory alloys and permanent magnets
... The model for the constant force biased Ni 49 Ti,, wire is used for the linear spring-biased wire; however, the resulting wire position and force require different formulas... Fig[r] ...
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Constitutive equations for superelasticity in crystalline shape-memory materials
... With this brief introduction, the purpose of this thesis is to formulate and nu- merically implement a crystal-mechanics-based constitutive model for shape-memory mate[r] ...
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Nitride coating enhances endothelialization on biomedical NiTi shape memory alloy
... memory alloy for vascular stent applications. Results from cell experiments indicated that, compared to untreated NiTi, a superficial gas nitriding treatment enhanced the adhesion of human umbilical vein ...
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Nonlinear oscillations and chaotic response of Shape Memory Alloys
... mechanical coupling on the behavior of shape memory devices. International Journal of Non-Linear Mechanics, 2009. 5.Moumni Z., Zaki W., and NGuyen Q.S. Theoretical and numerical modeling of solid-solid ...
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Thermal energy conversion by coupled shape memory and piezoelectric effects
... coupling shape memory effect (SME) and direct piezoelectric effect (DPE) is proposed, and two prototypes of thermal energy harvesters are fabricated and tested ...TiNiCu shape memory alloy ...
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Thermal energy conversion by coupled shape memory and piezoelectric effects
... First, we will briefly introduce the phenomenon of shape memory. During cooling, the SMA undergoes a martensitic transformation which is a diffusionless first-order phase transition. As a result, the ...
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