Helical Springs
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Evolutionary Design of Engineering Constructions
Abstract The basic information required to utilize one of possible computation tools/algorithms (mainly the evolution strategy) to solve a wide class of real practical engineering optimization problems is presented and discussed in the present paper. The effectiveness of the considered method is demonstrated by the possibility of the use of different form o
Lat. Am. j. solids struct.. Publicado em: 04/06/2018
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2. Axial Static Load Dependence Free Vibration Analysis of Helical Springs Based on the Theory of Spatially Curved Bars
Abstract This work addresses an accurate and detailed axial static load dependence linearly elastic free vibration analysis of cylindrical helical springs based on the theory of spatially curved bars and the transfer matrix method. For a continuous system, governing equations comprise coupled vibration modes namely transverse vibrations in two orthogonal pla
Lat. Am. j. solids struct.. Publicado em: 2016-12
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3. Thermomechanical Analysis on Ti-Ni Shape Memory Helical Springs Under Cyclic Tensile Loads
Shape memory alloys (SMAs) present some characteristics, which make it unique material to be use in applications that require strength and shape recovery. This alloys was been used to manufacture smart actuators for mechanical industry devices and several other applications in areas as medicine, robotics, aerospace, petroleum and gas industries. However it i
Mat. Res.. Publicado em: 2015-12
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4. Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloys
This article studies changes observed on the R-phase thermoelastic behavior in a near-equiatomic Ti-Ni shape memory alloy. Three kinds of procedures have been performed: different treatments, thermomechanical cycling under constant loading in shape memory helical springs and thermal cycling in as-treated and trained samples. Several heat treatments were carr
Materials Research. Publicado em: 2010-09
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5. Thermoelastic properties on Cu-Zn-Al shape memory springs
This paper present a thermomechanical study of actuators in form of helical springs made from shape memory alloy wires that can work as actuator and/or as sensor. These abilities are due to the martensitic transformation. This transformation is a diffusionless phase transition that occurs by a cooperative atomic rearrange mechanism. In this work, helical spr
Materials Research. Publicado em: 2010-06
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6. CaracterizaÃÃo termoelÃstica de atuadores helicoidais da liga Cu- Zn-AI com memÃria de forma
O advento dos materiais inteligentes ocorreu devido à crescente corrida tecnolÃgica com a introduÃÃo de novas tÃcnicas para o desenvolvimento de novos materiais capazes de proporcionar a produÃÃo de dispositivos heterodoxos resultando em melhorias funcionais aliadas a miniaturizaÃÃo e simplificaÃÃo. Esses dispositivos desenvolvidos a partir desses
Publicado em: 2007
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7. The helical model of the nucleosome core.
A model of the nucleosome core is proposed based on a topologically linear array of histones attached sequentially to DNA. The linear complex folds helically forming a spring-like particle. Different variants of the particle are discussed (cylindrical springs with and without histone-histone contacts between turns of the helix, solenoidal spring). The model
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8. Simulation of the conformation and dynamics of a double-helical model for DNA.
We propose a partially flexible, double-helical model for describing the conformational and dynamic properties of DNA. In this model, each nucleotide is represented by one element (bead), and the known geometrical features of the double helix are incorporated in the equilibrium conformation. Each bead is connected to a few neighbor beads in both strands by m