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  • 1975-1979  (13)
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Material
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  • 1
    Electronic Resource
    Electronic Resource
    Pentacoordinate intermediates in displacement at sterically hindered phosphorus. A correction (1979)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 101 (1979), S. 1322-1323 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00499a066
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Studies on effect of shape of cut on growth-stress induced cracking in cut timber—Part I: Three dimensional stress analysis (1977)
    Springer
    Wood science and technology 11 (1977), S. 237-247 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Naturally-occurring growth stress patterns in timber are modified by cutting. Stresses in cut timber may cause destructive cracks and splits. This research uses a three-dimensional finite element method to study how non-axisymmetric cuts affect the stress pattern. The results show that some oblique cuts reduce high stresses near the pith. Experimental work supports the calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00365618
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The ultrastructure of Auerbach's plexus in the guinea-pig. II. Non-neuronal elements (1976)
    Springer
    Journal of neurocytology 5 (1976), S. 195-206 
    Details
    ISSN: 1573-7381
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ultrastructural features of non-neuronal cells associated with Auerbach's plexus in the stomach, ileum and colon of the guinea-pig have been examined. Apart from Schwann, mast and interstitial or fibroblast-like cells, two other cell types are described that do not appear to have been reported previously. Of these two cell types, one was found external, but close to, the plexus and contained large granular vesicles. The other cell type contained numerous glycogen-like granules, was situated close to or within axon bundles and had processes that extended within and peripheral to nerve bundles as well as being close to smooth muscle cells. Although axon varicosities were opposed to both the processes and cell body of the second type of cell, synaptic-like contacts were not observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01181656
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The ultrastructure of Auerbach's plexus in the guinea-pig. I. Neuronal elements (1976)
    Springer
    Journal of neurocytology 5 (1976), S. 171-194 
    Details
    ISSN: 1573-7381
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ultrastructural features of nerve cell bodies and axon profiles within Auerbach's plexus in the stomach, ileum, caecum and colon of the guinea-pig have been examined. Nerve cell bodies have been tentatively classified into nine different types according to their size, distribution of organelles, location and relationship to satellite cells. Except for cell size, no attempt has been made to correlate ultrastructural with light microscopical observations. On the basis of vesicular size, shape and content, eight morphologically distinct types of axon profile have been identified as well as two profile types which are thought to reflect different physiological conditions. The axons contained various populations of small, mostly granular vesicles; small, round agranular vesicles; small, flattened vesicles; large flattened or elongated vesicles; and three types of large vesicle with granular contents distinguished by size. Some correlation between types of axon profile and two types of nerve cell body was recognized. However, more than one type of axon profile usually formed synapses with one type of cell body, and a precise correlation was not determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01181655
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Finite element buckling analysis of homogeneous and sandwich plates (1975)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 9 (1975), S. 39-50 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Finite element buckling analyses of plates are performed by means of quardrilateral elements having 12 degrees-of-freedom. It is found that if the plate is capable of appreciable transverse shear deformation, initial-stress stiffness matrices that represent the lateral dispalcement by cubic polynomials do not yield convergence to correct results. An initial-stress stiffness that works satisfactorily for both homogeneous and sandwich plates is formulated. A Fortran listing of the associated subroutine is provided.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620090104
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Artificial adjustment of element stiffness with a particular reference to plate bending (1976)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 10 (1976), S. 945-949 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A finite element may satisfy all convergence requirements and work well except for being too stiff or too flexible when the mesh is coarse. Here we discuss a technique for softening or stiffening such elements, provided that they have internal degrees-of-freedom. The technique is applied to a previously derived plate element, and the element is found to be much improved.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620100419
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    More about ‘artificial’ softening of finite elements (1977)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 11 (1977), S. 1334-1339 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A method is proposed for making overly stiff elements more flexible. The central idea is quite simple and is illustrated by application to a sample element, whose behaviour is greatly improved. The effort needed to soften an element is very small if its stiffness matrix is naturally produced with reference to generalized co-ordinates before a final transformation to nodal displacement degrees-of-freedom.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620110812
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Ways to improve the bending response of finite elements (1977)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 11 (1977), S. 1029-1039 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Four new ways to relieve the excessive bending stiffness of linear elements are described, and incorporated into plane elements. All satisfy the ‘patch test’. The new elements are compared with existing elements in test problems. Application to three-dimensional problems is proposed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620110609
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Application of optimization and finite element methods to a cracking problem in timber (1977)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 11 (1977), S. 756-758 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620110412
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    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Modelling the load transfer in threaded connections by the finite element method (1979)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 14 (1979), S. 1359-1377 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: We introduce a finite element model for stress analysis of threaded connections. Instead of modelling individual threads, the thread zone is replaced by a layer of elements with orthotropic properties. The principal directions of orthotropy depend upon the thread geometry and upon the direction of load, which is not necessarily known a priori. Both conventional and tapered threads are considered. The latter problem is nonlinear, as the number of threads in contact is a function of the load. Numerical results for conventional and tapered threads agree well with theoretical and exeprimental results in the literature.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620140909
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    Paper (German National Licenses)
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