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Ontwikkelingen op hetgebied van de resultaten van kuipproeven : de evolutie van de parametermethode

van Leeuwen, H.P. (author)

The concept of a time-temperature parameter is described. Methods are discussed for determining optimal values for the constants that appear in these parameters. These methods include the least squares approach, the use of orthogonal polynomials and Manson's new "minimum commitment station-function approach". Finally the effects of micro...

report 1970

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Correlations involving properties and microstructures of Al-An-Mg alloy forgings of the 7079 type

van Leeuwen, H.P. (author), van der Vet, W.J. (author), Schra, L. (author)

Correlation diagrams show that fracture toughness and fatigue crack propagation resistance are closely related properties, while stress corrosion endurance is a crack tolerance property with different characteristics. The heat treatment effects on characteristic dimensions of the microstructure could generally be explained on the basis of...

report 1970

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The repair of fatigue cracks in low-alloy steel sheet

van Leeuwen, H.P. (author), Schra, L. (author), Meulman, A.E. (author)

Fatigue cracks were grown in rectangular specimens with a central notch. At a certain crack length, the crack was repaired, using a variety of methods. Fatigue loading was resumed and re-initiation and subsequent growth of the fatigue crack were studied. The repair methods evaluated comprised simple stopholes, brazed straps across the crack,...

report 1970

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A simplified non-linear model of a manoeuvring ship

van Leeuwen, Ger (author)

report 1970

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Prediction of ship manoeuvrability

van Leeuwen, Ger (author)

report 1970

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Klemkrachten in klinknagels van een in welijzer uitgevoerde spoorbrug

van Leeuwen, J.L. (author)

report 1969

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Some notes on the discrepancies between the lateral motions of oscillation tests and full scale manoeuvres

van Leeuwen, Ger (author)

report 1969

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Tentative results of the horizontal oscillation with a 4 meter model of the Britisch Bombardier

van Leeuwen, Ger (author)

report 1969

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Enkele problemen bij het ontwerpen van een horizontale excitator

van Leeuwen, Ger (author)

report 1969

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Manoeuvreerproeven met Hr. Ms. De Zeven Provinciën en de jagers Noord-Brabant en Utrecht

van Leeuwen, Ger (author)

report 1967

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Experimental determination of linear and non-linear lateral hydrodynamic derivatives of a Mariner type ship model

van Leeuwen, Ger (author), Glansdorp, C.C. (author)

report 1966

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Overzicht materiaalonderzoek 1965

Nibbering, J.J.W. (author), van Leeuwen, R.T. (author)

report 1965

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The lateral damping and added mass of an oscillating shipmodel

van Leeuwen, Ger (author)

report 1964

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Golfsystemen veroorzaakt door een bron met sinusoidaal veranderde sterkte en een konstante voorwaartse snelheid

van Leeuwen, Ger (author)

report 1964

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The lateral damping and added mass of an oscillating shipmodel

van Leeuwen, Ger (author)

report 1964

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Untersuchungen über drehmanöver und kursstabilität von Schiffen von F. Horn und E.A. Walinski. Aantekeningen bij dit artikel

van Leeuwen, Ger (author)

report 1963

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Experimentele bepaling der kwaliteitsindices T1, T2, T3 en K van een Victory model

van Leeuwen, Ger (author)

report 1963

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Publicaties over supercavitatie. (korte beschrijving van de inhoud)

van Leeuwen, Ger (author)

report 1962

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Frequency response research on steering qualities of ships by K. Nomoto. Aantekeningen bij dit artikel

van Leeuwen, Ger (author)

report 1962

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Analysis of the standard manoeuvre test of Kempf and proposed steering quality indices and The improved simultaneous equation method of analysing zig-zag manoeuvre by K. Nomoto. Aantekeningen bij deze artikels

van Leeuwen, Ger (author)

report 1962