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Träfflista för sökning "(WFRF:(Zhang Yu)) srt2:(1990-1999) srt2:(1999)"

Sökning: (WFRF:(Zhang Yu)) srt2:(1990-1999) > (1999)

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Numrering	Referens	Omslagsbild	Hitta
1.	Zhang, Z. X., et al. (författare) Effects of loading rate on rock fracture 1999 Ingår i: International Journal of Rock Mechanics And Mining Sciences. - 1365-1609 .- 1873-4545. ; 36:5, s. 597-611 Tidskriftsartikel (refereegranskat)abstract By means of a wedge loading applied to a short-rod rock fracture specimen tested with the MTS 810 or SHPB (split Hopkinson pressure bar), the fracture toughness of Fangshan gabbro and Fangshan marble was measured over a wide range of loading rates, =10−2–106 MPa m1/2 s−1. In order to determine the dynamic fracture toughness of the rock as exactly as possible, the dynamic Moiré method and strain–gauge method were used in determining the critical time of dynamic fracture. The testing results indicated that the critical time was generally shorter than the transmitted wave peak time, and the differences between the two times had a weak increasing tendency with loading rates. The experimental results for rock fracture showed that the static fracture toughness KIc of the rock was nearly a constant, but the dynamic fracture toughness KId of the rock (≥104 MPa m1/2 s−1) increased with the loading rate, i.e. log(KId)=a log +b. Macroobservations for fractured rock specimens indicated that, in the section (which was perpendicular to the fracture surface) of a specimen loaded by a dynamic load, there was clear crack branching or bifurcation, and the higher the loading rate was, the more branching cracks occurred. Furthermore, at very high loading rates (≥106 MPa m1/2 s−1) the rock specimen was broken into several fragments rather than only two halves. However, for a statically fractured specimen there was hardly any crack branching. Finally, some applications of this investigation in engineering practice are discussed.
2.	Nishimura, M, et al. (författare) Presenilin mutations associated with Alzheimer disease cause defective intracellular trafficking of beta-catenin, a component of the presenilin protein complex 1999 Ingår i: Nature medicine. - : Springer Science and Business Media LLC. - 1078-8956 .- 1546-170X. ; 5:2, s. 164-169 Tidskriftsartikel (refereegranskat)
3.	Zhang, Z.X., et al. (författare) Dynamic fracture behaviour of rock at high temperatures 1999 Ingår i: Rock mechanics for industry. - Rotterdam : Balkema Publishers, A.A. / Taylor & Francis The Netherlands. - 9058090523 ; , s. 325-331 Konferensbidrag (refereegranskat)

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Typ av publikation: tidskriftsartikel (2); konferensbidrag (1)

Typ av innehåll: refereegranskat (3)

Författare/redaktör: Yu, J. (2); Lindqvist, Per-Arne (2); Kou, S.Q. (2); Zhang, Z. X. (2); Jiang, L.G. (2); Yu, Y (1); visa fler...; Liang, Y (1); Chen, F (1); Nishimura, M (1); Lannfelt, L (1); St George-Hyslop, P (1); Holmes, E. (1); Yu, G (1); Rogaeva, E (1); Mattila, K. (1); Zhang, DM (1); Kawarai, T (1); Westaway, D (1); Levesque, G (1); Ruel, L (1); Milman, P (1); Jo, E (1); Supala, A (1); Xu, DM (1); Janus, C (1); Levesque, L (1); Bi, Q (1); Duthie, M (1); Rozmahel, R (1); Mount, HTJ (1); Woodgett, J (1); Fraser, PE (1); visa färre...

Lärosäte: Luleå tekniska universitet (2); Karolinska Institutet (1)

Språk: Engelska (3)

Forskningsämne (UKÄ/SCB): Teknik (2)

År: 1999 (3)Ta bort avgränsningen

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