ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Evolution of microcracks in brittle solids under intense dynamic loading (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 3479-3483 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An evolution equation of microcracks for brittle cracked materials subjected to an applied dynamic tensile pressure is presented. The influence of inertial effects (or kinetics) on the dynamic growth of microcracks, which is a major characteristic of intense dynamic loading, is taken into account. Numerical analysis of the evolution equation clearly indicates that microcrack growth at high strain rate (ε(overdot)≥103 s−1) is unstable. The critical condition for microcrack dynamic growth is obtained. It is predicted that the threshold stress for dynamic growth of microcracks is dependent on the average strain rate at super-high strain rate (ε(overdot)≥106 s−1); however, numerical result is also shown that when the average strain rate ≤105 s−1, the threshold stress can be, approximately, taken to be a constant. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359564
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Activation of boron implanted in Hg0.7Cd0.3Te by high-temperature annealing (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4983-4988 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Boron was implanted into the p-type Hg0.7Cd0.3Te epitaxial crystals. The implantation was carried out using a fluence of 1.45×1015 cm−2 and an energy of 100 keV. The implanted specimens, as well as unimplanted ones, were annealed without encapsulation by one-zone annealing in an atmosphere of mercury vapor supplied from liquid mercury at temperatures from 250–500 °C. From the annealing of unimplanted specimens, a p-n transition at 350 °C is observed. On the other hand, from the annealing of implanted specimens, it is found that the n-type conductivity induced by implantation damage is gradually reduced with the increase of annealing temperature until a minimum appears around 350 °C, and then increases again. An enhancement of n-type conductivity can be further observed from annealing under a reduced pressure of mercury. A similar result is also obtained from the annealing of implanted specimens using a HgTe compound as the mercury reservoir instead of liquid mercury. The results suggest that the implanted borons become activated dopants after annealing at high temperature. A mechanism on the activation of boron in HgCdTe is thus proposed, and the experimental results can be satisfactorily explained by the mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340444
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Yield of Solvated Electrons in the Aliphatic Alcohols at Picosecond Times (1974)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 78 (1974), S. 2414-2416 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150671a022
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Mechanistic studies on the reduction of the R2 subunit of ribonucleotide reductase
    Amsterdam : Elsevier
    Journal of Inorganic Biochemistry 43 (1991), S. 532 
    Details
    ISSN: 0162-0134
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0162-0134(91)84507-6
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    The optical properties of curing epoxies and applications to the fiber-optic epoxy cure sensor
    Amsterdam : Elsevier
    Sensors and Actuators A: Physical 23 (1990), S. 1107-1110 
    Details
    ISSN: 0924-4247
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0924-4247(90)87097-3
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    A stochastic finite element method for fatigue reliability analysis of gear teeth subjected to bending (1998)
    Springer
    Computational mechanics 21 (1998), S. 253-261 
    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 A stochastic finite element method (SFEM) is developed for accurate structural reliability analysis. Using the second-order three-moment reliability analytical model, this method takes into account such random factors as load, material parameters and especially geometry randomness. The calculation of the bending fatigue strength reliability of a cantilever beam is carried out as a numerical example to verify the present method. Monte-Carlo FEM and SFEM based on the first-order second-moment model are used in the example to compare with the proposed method. By incorporating the fatigue theory of gears, the present method is then used to analyze the bending fatigue strength reliability of a spur gear. The effects of random variables' coefficient of variation and skewness and the gear's correction factor (not random variable) on the gear's reliability are also investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004660050300
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Three-dimensional vibration of cylindrical shell panels – solution by continuum and discrete approaches (2000)
    Springer
    Computational mechanics 26 (2000), S. 208-221 
    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  This paper presents a three-dimensional elasticity solution to the free vibration problem of thick cylindrical shell panels of rectangular planform. The natural frequencies and corresponding mode shapes were obtained for thick cylindrical shell panels and detailed parametric investigations were carried out. Comparisons were also made with corresponding finite element simulation results. To validate the accuracy of the results as well as the stability of the present methodology, comprehensive convergence studies were also carried out. Further comparisons of present results were made with existing experimental and numerical results (classical, first-order and higher-order shell theories) available in open literature and the validity and range of applicability of the various shell theories examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004660000168
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    A new integral equation formulation for the analysis of crack-inclusion interactions (1992)
    Springer
    Computational mechanics 10 (1992), S. 217-229 
    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 A new integral equation method for the analysis of the interactions between cracks and elastic inclusions embedded in a two-dimensional, linearly elastic, isotropic infinite medium subjected to in-plane force is presented. By distributing dislocations along the crack lines and forces along the matrix-inclusion interfaces, a set of coupled integral equations is obtained. The discretization procedure of the integrals involved is discussed and the relations between the stress intensity factors and the values of the dislocation functions at the respective crack tips are derived. Several sample problems are presented in order to determine the versatility and the accuracy of this approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00370090
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    A numerical model based on orthogonal plate functions for vibration of ring supported elliptical plates (1992)
    Springer
    Computational mechanics 9 (1992), S. 113-120 
    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 accurate and computationally efficient numerical method is proposed for vibration analysis of thin elliptical plates lying on a circular or an elliptical ring support. A set of orthogonal two-dimensional plate functions generated through the Gram-Schmidt recurrence formula is used as the admissible functions in the Rayleigh-Ritz approach. Natural frequencies and mode shapes are obtained by minimizing the functional with respect to the unknown coefficients. Several numerical examples are solved and the obtained results are carefully examined by convergence tests and compared with available results in the literature. Close agreement is achieved in all cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00370066
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Modelling the fracture of cementitious materials (1992)
    Springer
    Materials and structures 25 (1992), S. 14-20 
    Details
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Description / Table of Contents: Resume Deux modèles de description de la rupture par fissuration des matériaux à base de ciment sont ici étudiés: celui de la ‘bande de fissuration’ et celui de la ‘fissuration fictive’. Les deux types d’analyse sont très proches mais on montre cependant que le modèle de ‘fissure fictive’ peut se ramener à une méthode de superposition de trois facteurs d’intensité de contrainte dont l’utilisation requiert la connaissance d’expressions analytiques. Cette méthode se révèle donner des résultats très similaires à ceux obtenus par éléments finis avec la ‘fissure fictive’ et présente l’avantagè de pouvoir être programmée sur un ordinateur de type P.C. On démontre la capacité de prédiction du modèle de fissuration fictive par comparaison de la courbe expérimentale charge/flèche d’une petite éprouvette de mortier entaillée avec la courbe théorique calculée à partir des données obtenues sur des poutres plus grandes. On suggère que la méthode d’essai RILEM, peur la détermination de l’énergie de rupture, soit aussi utilisée afin d’établir une relation bilinéaire contrainte-déplacement pour la phase de radoucissement qui apparaît dans la zone de fissuration.
    Notes: Abstract The crack band and the fictitious crack line models of the fracture process zone in cementitious materials are discussed. The two methods are quite similar. However, the fictitious crack model is shown to lend itself to a simple K-superposition method which makes use of known analytical expressions. This method is shown to give very similar results to a finite-element analysis of the fictitious crack model and has the advantage that it can be programmed for a personal computer. The predictive capability of the fictitious crack model is demonstrated by comparison of the experimental load-deflection curve for a small notch bend mortar specimen with a theoretical curve calculated from data obtained from larger beams. It is suggested that the RILEM test method for the determination of the fracture energy should be used also to establish a bilinear stress-displacement relationship for the strain-softening of the fracture process zone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02472208
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...