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  • 2000-2004  (6)
  • 1990-1994  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Size Effects of Hair-Sized Structures – Torsion (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 261-263 (Apr. 2004), p. 11-22 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conventional strain-based mechanics theory does not account for contributions from strain gradients. Failure to include the strain gradient contributions can lead to underestimates of stresses and size-dependent behaviors in small-scaled structure [1]. This paper focus on the structural size effects on torsion of cylinders. The torsional stiffness of cylinders can be higher than conventional expectation when the cylinder size is in the nanometer - or micron-scale. Following the Saint-Venant theory of torsion, we established the equation of torsion in terms of the warping function on the basis of the nano-mechanical theory of elasticity. The torsional equations contain two higher order material length scale parameters and two conventional Lame constants. The equilibrium equation is a fourth order partial differential equation which can be reduced to two second order equations. Two formulations in terms of pseudo warping function and stress function are presented. Closed-form solutions for circular and thin wall section and series solutions for rectangular microbars have been obtained. The total torque depends only on the stresses conjugated to the strain and is only implicitly dependent on the higher order stress metrics. The solution reveals that the torsional rigidity is dependent on the higher order length scale parameters and strain gradients and increases asymptotically upward when the cylinder size is reduced to the size of the higher order length scale material parameters. The increase is most marked for thin walled cylinders, stiffening to more then 10 times the conventional value when the cylinder size is near that of the higher order length scaled parameters
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.261-263.11.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Overview of Fracture of Piezoelectric Ceramics (2000)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 183-187 (Apr. 2000), p. 695-706 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/45/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.183-187.695.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of Columbic Force on Piezoelectric Fracture (2004)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 261-263 (Apr. 2004), p. 81-86 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper studies the effect of the Columbic force on piezoelectric fracture. Bound charges emerge on the upper and lower surfaces of a permeable crack when a piezoelectric solid with the crack is subjected to far-field mechanical/electric loading. Taking into account the Columbic force between the bound charges, we obtain a non-linear equation governing the normal component of electric displacement D〈sub〉2〈/sub〉(x〈sub〉1〈/sub〉)on the crack faces. The results show that D〈sub〉2〈/sub〉(x〈sub〉1〈/sub〉)is, in general, not a constant along the crack faces and depends on the mechanical/electric loading conditions, the crackprofile and the material properties outside and inside the crack. Furthermore, we examine the Columbic force under low mechanical/electric loads and then discuss the effect of the Columbic force on the fracture behaviour of piezoelectric materials
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.261-263.81.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Transient Response of Airport Runway (2003)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 243-244 (July 2003), p. 135-140 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/46/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.243-244.135.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Structural Remodeling of Blood Vessels Due to Change in Pressure (2003)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 243-244 (July 2003), p. 475-480 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/47/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.243-244.475.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Residual strength of aircraft panels with multiple site damage (1994)
    Springer
    Computational mechanics 13 (1994), S. 285-294 
    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 Multiple site damage (MSD) is a type of cracking that may be found in aging airplanes which can adversely affect the damage tolerance of an airframe structure. In this paper the behavior of MSD is studied by examining the interaction of cracks in stiffened and riveted panels. The hybrid finite element method, in conjunction with the complex variable theory of elasticity, is used to provide accurate and efficient solutions to these problems. Typical results include stress intensity factors at the crack tips, stress concentration factors in the stiffeners, and rivet loads for a stiffened structure with multiple cracks. Particular emphasis is placed on the derivation and interpretation of residual strength diagrams. This study produces a better understanding of the interaction between multiple cracks and provides insight for avoiding MSD in future designs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00350230
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of fastener holes on residual strength (1994)
    Springer
    International journal of fracture 67 (1994), S. 315-324 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper derives simple formulas to predict the reduction of the residual strength due to rivet holes in stiffened and unstiffened panels of aircraft structure. Results show that the reduction can be 40 percent or more from that of panels without rivet holes. The problem is particularly severe for materials of low yield strength and high fracture toughness and for designs with small rivet spacing. It can have a serious airworthiness implication if the effect of rivet holes is unaccounted for in the assessment of aircraft structural integrity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00032498
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  • 8
    facet.materialart.
    Unknown
    Classical and computational solid mechanics : Solid mechanics (2001)
    Singapore ; River Edge, NJ : World Scientific
    Advanced series in engineering science  
    Details
    Keywords: Engineering mathematics. ; Mechanics, Applied, Mathematical models.
    Notes: 1. Introduction -- 2. Tensor analysis -- 3. Stress tensor -- 4. Analysis of strain -- 5. Conservation laws -- 6. Elastic and plastic behavior of materials -- 7. Linearized theory of elasticity -- 8. Solutions of problems in linearized theory of elasticity by potentials -- 9. Two-dimensional problems in linearized theory of elasticity -- 10. Variational calculus, energy theorems, Saint-Venant's principle -- 11. Hamilton's principle, wave propagation, applications of generalized coordinates -- 12. Elasticity and thermodynamics -- 13. Irreversible thermodynamics and viscoelasticity -- 14. Thermoelasticity -- 15. Viscoelasticity -- 16. Large deformation -- 17. Incremental approach to solving some nonlinear problems -- 18. Finite element methods -- 19. Mixed and hybrid formulations -- 20. Finite element methods for plates and shells -- 21. Finite element modeling of nonlinear elasticity, viscoelasticity, plasticity, viscoplasticity and creep -- Bibliography -- Author index -- Subject index
    Pages: xx, 930 p.
    URL: http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=91467
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    E-Book (German National Licenses)
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