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  • 1
    Electronic Resource
    Electronic Resource
    A buildup voltage distribution (BVD) algorithm for shape control of smart plate structures (2000)
    Springer
    Computational mechanics 26 (2000), S. 115-128 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  An intuitive approach for the determination of voltage distribution in the application to shape control of smart structures using piezoelectric actuators is presented here. The algorithm called the Buildup Voltage Distribution (BVD) is based on an iterative approach inspired by a combination of existing iterative techniques. The mathematical model of the smart structure is based on a High Order Displacement (HOD) field coupled with a Layerwise Linear electric potential. The current shape control work will make use of the Finite Element (FE) formulation based on the above mentioned mathematical model. The development of the BVD algorithm makes no linearity assumption between displacement and voltage and hence can be applied to non-linear mathematical models. The algorithm will then be compared with two well-known algorithms. In addition, a patch insensitivity index is defined to identify the most and least effective locations for piezoelectric actuators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004660000159
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  • 2
    Electronic Resource
    Electronic Resource
    Analysis of adhesive bonded composite lap joints with transverse stitching (1996)
    Springer
    Applied composite materials 2 (1996), S. 343-365 
    Details
    ISSN: 1573-4897
    Keywords: transverse stitching ; adhesive bonding ; composite ; lap joints ; stresses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effect of transverse stitching on the stresses in the adhesive is investigated using an adhesive sandwich model with nonlinear adhesive properties and a transverse stitching model for adhesive bonded composite single-lap and double-lap joints. Numerical results indicate that, among all stitching parameters, thread pretension and stitch density have significant effect on the peel stresses in the adhesive; increase in the thread pretension and the stitch density leads to a decrease in peel stress in the adhesive, while an increase in other parameters generally results in a negligible reduction in peel stress. The effect of stitching was found to be negligible on the shear stresses in the adhesive. Thus it is concluded that stitching is effective for the joints where peel stresses are critical and ineffective for those where shear stresses are critical.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00564573
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of transverse shear deformation on free vibration of orthotropic conical shells (1994)
    Springer
    Acta mechanica 107 (1994), S. 65-75 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The solutions for five displacements, in the form of a power series, are obtained for the five governing equations of free vibration of orthotropic conical shells including the transverse shear deformation. The convergence condition for the solutions is also determined. As an illustrative example, axisymmetric vibration of isotropic and orthotropic cones, with different geometric and material parameters and under two types of boundary conditions, are analyzed numerically to investigate the effect of the transverse shear deformation on the frequency parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201820
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  • 4
    Electronic Resource
    Electronic Resource
    Bond strength for adhesive-bonded single-lap joints (1996)
    Springer
    Acta mechanica 117 (1996), S. 101-113 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Arbitrarily nonlinear stress-strain behaviour in both shear and peel for adhesive are utilised to formulate two coupled nonlinear governing equations for an adhesive-adherend sandwich of single-lap type. For a balanced adhesive-adherend sandwich, the two equations can be integrated, and simple formulas for bond strength are developed for characterising pure shear, peel and mixed failure in adhesive. These formulas define the bond strength in terms of the maximum strain energy density in the adhesive. It is shown that the product of the adhesive strain energy density and the adhesive thickness is equal to the energy release rateJ of mode I, mode II and mixed fracture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01181040
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  • 5
    Electronic Resource
    Electronic Resource
    Buckling analysis of pretwisted composite columns (1992)
    Springer
    Acta mechanica 93 (1992), S. 63-71 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Through the principle of total potential energy the equilibrium equations and related boundary conditions for buckling analysis of pretwisted laminated columns are derived and solved analytically. It is shown that the coupling between bending and stretching actions has a significant effect on the critical loads —the critical loads increase as the coupling term increases. Numerical results for pinned-pinned composite columns with square cross sections are computed and the effects of natural twist and bending-stretching coupling on the buckling loads are investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01182573
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  • 6
    Electronic Resource
    Electronic Resource
    Comments and author's reply on “Effect of transverse shear deformation on free vibration of orthotropic conical shells” by L. Tong [Acta Mechanica 107, 65–75 (1994)] (1997)
    Springer
    Acta mechanica 121 (1997), S. 233-234 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01262534
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of nutrient pulse concentration and frequency on growth ofGracilaria chilensis plants and levels of epiphytic algae (1993)
    Springer
    Journal of applied phycology 5 (1993), S. 525-533 
    Details
    ISSN: 1573-5176
    Keywords: Gracilaria chilensis ; growth ; nutrient pulses ; epiphyte abundance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effect of nutrient pulse concentration and frequency onGracilaria chilensis Bird, McLachlanet O Oliveira growth and epiphyte abundace was investigated for plants grown in an indoor culture facility. The frequency of nutrient pulses (which ranged from 1 pulse to 4 pulses per 14 days) had a strong influence on plant growth, while pulse concentration (from 72 to 143 µM as ammonium) had a lesser influence. Growth became a function of total N flux only when plants received nutrient pulses at least twice per 14 days. Both pulse frequency and pulse concentration affected the abundance of epiphytic algae found attached toGracilaria thalli, but pulse frequency was the more significant of the two factors. Their effects could be combined into the single factor, total N flux. Both reasonableG. chilensis growth and low levels of epiphytes were achieved under these conditions (20 °C, 25 µ mol photon m−2 s−1 PAR) if ammonium was pulsed at relatively high concentrations (up to 150 µM) once every 7 days into otherwise nitrogen-depleted seawater.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182511
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  • 8
    Electronic Resource
    Electronic Resource
    Seasonal growth, density, reproductive phenology and agar quality of Gracilaria sordida (Gracilariales, Rhodophyta) at Mokomoko Inlet, New Zealand (1990)
    Springer
    Hydrobiologia 204-205 (1990), S. 253-262 
    Details
    ISSN: 1573-5117
    Keywords: agar quality ; density ; Gracilaria ; growth ; reproductive phenology ; seasonality ; seaweed
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Growth of mesh-enclosed Gracilaria sordida plants was determined monthly for one year at the Mokomoko mudflat, South Island, New Zealand. Growth of plants with permanent water cover was correlated with water temperature and was most rapid during summer months. Plants exposed at low tide grew only during early spring and late autumn. Bimonthly quadrat sampling of a mudflat population showed that all stages of the life cycle were present throughout the year. Spermatangial plant length and biomass were greatest in early spring; cystocarpic and tetrasporic plants were greatest in midsummer. Sterile plants were most numerous in the late summer. Agar yield showed little variation either seasonally or between different stages of the life cycle. Agar gel strengths for all life cycle stages were greatest at the time of peak plant size and abundance. Gels from spermatangial plants generally were weaker than those from other stages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00040242
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  • 9
    Electronic Resource
    Electronic Resource
    Polymer dispersion preparation by flow induced phase inversion emulsification. Part 1 The effect of silica on emulsification and dispersion characteristics (2000)
    Springer
    Journal of materials science 35 (2000), S. 3699-3709 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Low density polyethylene (LDPE) melt was emulsified in the presence of a hydrophobically modified water soluble polymer (HMWSP) and colloidal hydrophilic silica using the Flow Induced Phase Inversion (FIPI) emulsification technique. HMWSP was used as the surface active material. After the emulsification, LDPE melt was solidified to obtain a polymeric dispersion. Silica was used to aid the emulsification and improve the emulsion/dispersion characteristics. It was shown that the presence of silica increases the amount of aqueous phase necessary for phase inversion from water-in-LDPE melt to LDPE melt-in-water emulsion. The mean particle size and particle size span increased in the presence of silica. However, due to broader particle size distribution, the viscosity was lowered. The dispersions with silica appeared to form a more uniform film compared with the dispersion without silica. When the silica concentration is less than 1% in aqueous phase, an emulsion is obtained. At 2% silica level, a wet powdery material is obtained. This material can be diluted to obtain a dispersion or it could be used in powder coating.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004848523535
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  • 10
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    Erratum: “Unintentional doping induced splitting of G peak in bilayer graphene” [Appl. Phys. Lett. 99, 233110 (2011)] (2012)
    American Institute of Physics
    Details
    Publication Date: 2012-02-06
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics
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