A Review on Shape Memory Alloy Structures

Balapgol, Basavaraj S.; Kulkarni, Sudhakar A.; Bajoria, Kamal M.

doi:10.20855/ijav.2004.9.2157

Cited by 6 publications

(5 citation statements)

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“…SMA actuators are plastically deformed while in the low temperature phase, and such deformations could be in the forms of bending, twisting, stretching and compressing. The plastically deformed actuators are then able to return to their original size and shape by undergoing an internal phase transformation process through the increase of temperature [2]. This phase transformation process generates a thermal-mechanical driving force.…”

Section: Introductionmentioning

confidence: 99%

A two-dimensional finite element analysis of a shape memory alloy laminated composite plate

Balapgol

Bajoria

Kulkarni

2006

Smart Mater. Struct.

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The deflection and time response of shape memory alloy laminated composite plate are studied using first order shear deformation theory. The composite plate consists of a thin layer of shape memory alloy bonded to an elastomer layer. The governing equations of the plate are developed using the energy balance equations and a two-dimensional model of the shape memory alloy layer. The finite element is modeled with the first order shear deformation theory and equivalent single layer assumptions. The model is validated by comparing the results of the displacements and time responses with the literature. As a specific example, a cantilever composite plate is used for parametric studies. The effect of material properties, electric input power, thickness, thermal conductivity and heat sink strength on deflection and time response is also investigated.

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Section: Introductionmentioning

confidence: 99%

A two-dimensional finite element analysis of a shape memory alloy laminated composite plate

Balapgol

Bajoria

Kulkarni

2006

Smart Mater. Struct.

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“…[3] [8] Sand is one of the essential components of concrete. Natural sand is typically extracted from riverbeds and always has large concentrations of inorganic components, such as silt and clay, which negatively impact the properties of concrete leading to the increased maintenance cost [10]. Researchers worldwide are constantly looking for novel materials that can either completely or partially replace cement [11,25].…”

Section: Introductionmentioning

confidence: 99%

Effect of manufactured sand, micro silica, and GGBS on properties of high-performance concrete

Chougale,

Bage

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The most often used building material for engineering constructions is concrete. The rapid urbanization has necessitated the need for High Strength (HS) and High -Performance Concrete (HPC) for specialized constructions, such as high rise/tall structure and other important structures. Greater cement content may be required for concrete with higher performance like strength and durability, but code does not permit it, because higher cement content increases the heat of hydration, which leads to the development of thermal cracks in concrete, reduces its structural performance and damage environment by producing CO2 during production of Ordinary Portland Cement (OPC). This study tries to replace OPC by Micro Silica (MS) and Ground Granulated Blast Furnace Slag (GGBS) by some percentage to find our effect of these materials on properties of concrete HPC. In this work, the influence of Manufactured Sand (M-Sand), Micro Silica (MS) and Ground Granulated Blast Furnace Slag (GGBS) on the mechanical and durability qualities of High - Performance Concrete (HPC) is examined experimentally. Ordinary Portland cement (OPC) is used to create the HPC mixtures and then 40%,45%, 50% by weight of OPC is replaced with GGBS and 2.5% and 5% by weight of OPC is replaced with MS respectively. Additionally, OPC is replaced by 40%GGBS+ 2.5% MS, 40% GGBS+5% MS, 45%GGBS+ 2.5% MS, 45% GGBS+5% MS, and 50%GGBS+ 2.5%MS, 50%GGBS+5% MS. For each percentage replacement workability test, compressive test at the age of 28,56 and 90 days, water permeability test at 28 days and 90 days, Scanning Elector Microscope (SEM) test after 90 days are carried out. The investigative study’s findings showed that partial replacement of OPC with GGBS, MS, and combinations of GGBS and MS produces more consistent outcomes for strength and durability when compared to control mix.

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“…Muscle-like motion has been achieved most popularly based on pneumatic motion, which is mostly desired for power assisting devices [5,17,21,25,27]. Shape Memory Alloys (SMA) are also commonly used actuators for controlling stiffness, shape, or vibratory motions, but they would not render it an entirely soft structure [2,19,29]. Similar features have also been engineered into polymers [20].…”

Section: Introductionmentioning

confidence: 99%

Low-Power and Low-Cost Stiffness-Variable Oesophageal Tissue Phantom

Thorn

Afacan

Ingham

et al. 2017

Towards Autonomous Robotic Systems

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Biological tissues are complex structures with changing mechanical properties depending on physiological or pathological factors. Thus they are extendible under normal conditions or stiff if they are subject to an inflammatory reaction. We design and fabricate a lowpower and low-cost stiffness-variable tissue phantom (SVTP) that can extend up to 250% and contract up to 5.4% at 5 V (1.4 W), mimicking properties of biological tissues. We investigated the mechanical characteristics of SVTP in simulation and experiment. We also demonstrate its potential by building an oesophagus phantom for testing appropriate force controls in a robotic implant that is meant to manipulate biological oesophageal tissues with changing stiffness in vivo. The entire platform permits efficient testing of robotic implants in the context of anomalies such as long gap esophageal atresia, and could potentially serve as a replacement for live animal tissues. A. Thorn and D. Afacan-Contributed equally.

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A Review on Shape Memory Alloy Structures

Cited by 6 publications

References 0 publications

A two-dimensional finite element analysis of a shape memory alloy laminated composite plate

A two-dimensional finite element analysis of a shape memory alloy laminated composite plate

Effect of manufactured sand, micro silica, and GGBS on properties of high-performance concrete

Low-Power and Low-Cost Stiffness-Variable Oesophageal Tissue Phantom

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