[PDF] Top 20 Role of plasticity-induced crack closure in fatigue crack growth

... Since in situ visualization of the near-tip deformations is hardly feasible in the places where the plane-strain situation is approached, computational simulation turns out to be the right way to ... See full document

... problem in using fracture mechanics concepts in designs seems to be the use of crack growth data in predicting fatigue ...and crack growth per cycle (da/dN). ... See full document

... components. Plasticity induced crack closure is intimately linked with the crack tip plastic deformation, which becomes residual as the crack ...effect of crack ... See full document

... Fatigue crack growth mechanisms of long and small cracks were investigated in cast and wrought aluminum and titanium alloys with various microstructures (as-cast A535, 6061-T61, and ... See full document

... types of ageing heat treatment were performed: interrupted ageing and RRA ...mainly fatigue crack growth rate, and fracture processes in the low-moderate ΔK ...contribution of ... See full document

... the fatigue lives under CA loading varies significantly from VA ...participation of the load sequencing or load interaction effects under VA loading affect the rate of fatigue crack ... See full document

... new fatigue lifeing method, which uses the lead crack concept (Molent, Barter and Wanhill, 2011) within the safe life (SL) philosophy ...lead crack initiates upon entry into service and leads to ... See full document

... described in ASTM E 647 ...(R) of 0.5. This stress ratio was suggested to reduce the crack closure effect ...frequency of 30 Hz under room temperature conditions that ranged from 20 to ... See full document

... research, fatigue crack growth da/dN x ∆ K has been studied in two dual-phase steels broadly used in the automotive industry, with 7% to 12% of martensite volume ...one of ... See full document

... broadening of fatigue analyses of cyclic loaded structures while, at the same time, producing con- servative predictions of the fatigue life for several classes of struc- tural ... See full document

... because of their high speciic strength and elastic ...excellent fatigue crack growth resistance when compared with that of the conventional 2000 and 7000 series ...alloys. In ... See full document

... because of their high specific strength and elastic ...excellent fatigue crack growth resistance when compared with that of the conventional 2000 and 7000 series ...alloys. In ... See full document

... After the tests, the broken surfaces were examined under scanning microscope, at different magnifications varying from 200 to 10000 to identify and quantify different fractographic features. A method for quantitative ... See full document

... reduction in tensile strength on weathered polypropylene ...observed in another study [7] the presence of brittle layers on polyvinyl chloride (PVC) and Nylon 6,6 weathered specimens which exhibited ... See full document

... defined, in order to obtain a stable mixed-mode crack growth ...geometry of specimen retained for experimental test is illustrated in ... See full document

... life in these ...factor of about 7 for both AW and WH joints as R OL was increased from ...improvement in the fatigue behavior of the welded joints, upon increasing the intensity ... See full document

... industries in the use of adhesively bonded weight efficient structures using aluminium joints were the ones that developed surface treatments, notably Boeing who patented the phosphoric acid anodising (PAA) ... See full document

... the crack surfaces from the notch tip to the end of the ...or in the optical microscope unless the specimens were ...sites in the crack wake. A rub- ber-bridging site close to the ... See full document

... system of this testing machine becomes more complicated than those in common used testing machines since three hydraulic actuators must be controlled simultaneously and independently by employing a test ... See full document

... accumulation of smaller cells, in particular the remigium (see Figure 3 ...located in the centre of the ...correlation of wing cell size with distance to the ...edge of the wing ... See full document