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  • 1970-1974  (3)
  • 1960-1964
  • 1970  (3)
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  • 1970-1974  (3)
  • 1960-1964
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    International journal of fracture 6 (1970), S. 127-137 
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Zugproben an stumpf aneinandergefügten, mit einzelnen Rissen nach den Bindeflächen behafteten Epoxyharz-Aluminiumplatten zeigen, daß es eine charakteristische Rißlänge gibt, unterhalb deter die Bruchfestigkeit des Verbundhalbzeugs maßgeblich von den Spannungskonzentrationen an den Bindekanten beeinflußt wird. Bei Probestücken mit Rissen, die gegen die charakteristische Länge groß sind, wird der Bruch des Verbundhalbzeugs gänzlich von den Spannungskonzentrationen an den Spitzen der Risse bestimmt. Im letzteren Fall scheinen die von Sih und Rice bzw. von Erdogan defmierten Intensitätsfaktoren vertretbar gut mit den Versuchsergebnissen übereinzustimmen.
    Abstract: Résumé Des essais a la traction, effectués sur plaques d'époxyde-aluminium jointes par rapprochement et contenant crevasses individuelles le long des surfaces de joint, montrent qu'il existe une longueur caractéristique de crevasse, au-dessous de la résistance à la rupture du composé est essentiellement influencée par les concentrations de tractions aux arêtes de joint. Pour échantillons avec crevasses dont la longueur est grande devant la longueur caractéristique, la rupture du composé est déterminée entièrement par les concentrations de tractions an bout des crevasses. Dans ce dernier cas, les coefficients d'intensité de traction, définis par Sih et Rice et par Erdogan, semblent s'accordei plutôt bien avec les résultats des essais.
    Notes: Abstract Tensile tests conducted on butt joined epoxy-aluminum plates containing single cracks along the bond surfaces showed that there exists a characteristic crack length below which the fracture strength of the composite is mainly influenced by the stress concentrations at the bond edges. For specimens with cracks longer than the characteristic length the fracture of the composite is entirely controlled by the stress concentrations at crack tips. In the latter case the stress intensity factors defined by Sih and Rice, and Erdogan appeared to agree reasonably well with test results.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 10 (1970), S. 327-331 
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Interpenetrating polymer networks of polyacrylate (A) and poly (urethane-urea) (U) were prepared by mixing lattices of self-curing polyacrylate and urethane-urea prepolymer followed by subsequent curing of each network. The structures of the mixtures were analyzed by the dynamic viscoelasticity and the electron microscopy. It was found that a phase inversion occurred from the “U-phase particles in A-phase matrix” to the “A-phase in U-phase matrix” at A/U ≑ 30/70 as the U-phase content increases.With increasing A-phase content, tensile strength started to increase and elongation-to-break becomes almost constant after the A-phase formed a continuous phase. This implies that the tensile properties are closely related to the morphological features.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 8 (1970), S. 505-510 
    ISSN: 0449-2986
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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