971 resultados para Structure Z c (3900)


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1560140Junghuhnia rhizomorpha H.S. Yuan & Y.C. DaiMegasporoporia microporela X.S. Zhou &Y.C. Dai7Ganoderma sarasinii SteyaertGloeocystidiellum donkii S.S. RattanGrammothele lineata Berkeley & M.A. CurtisJacksonomyces furfurellus (Bres.) Sheng H. Wu & Z.C. ChenJunghuhnia separabilima (Pouzar) RyvardenProtomerulius africanus (Ryvarden) RyvardenWrightoporia japonica Nñez & Ryvarden7855.7% Polyporaceae33.3%Meripilaceae10%Polyporus7.9%%Phellinus5.7%68.3%23.3%35%30% 2153217 Fomes fomentarius (L.:Fr.) Fr.28pH7

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The Dugdale-Barenblatt model is used to analyze the adhesion of graded elastic materials at the nanoscale with Young's modulus E varying with depth z according to a power law E = E-0(z/c(0))(k) (0 < k < 1) while Poisson's ratio v remains a constant, where E-0 is a referenced Young's modulus, k is the gradient exponent and c(0) is a characteristic length describing the variation rate of Young's modulus. We show that, when the size of a rigid punch becomes smaller than a critical length, the adhesive interface between the punch and the graded material detaches due to rupture with uniform stresses, rather than by crack propagation with stress concentration. The critical length can be reduced to the one for isotropic elastic materials only if the gradient exponent k vanishes.

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IEECAS SKLLQG

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SHANS (Spectrometer of Heavy Atoms and Nuclear Structure)ZARFQRFQ1LLPT RFQRFQ1LRFQ1L0.5 mm1.710-4 Pa(0.040.02) Pa/hLPTLPTLPTLPTCtrlSys