effect of hardness hv on fatigue limits of materials

... scope : The aim of this work is the study the effect of the location of welding joint on the fatigue life and fatigue strength of rotating steel shaft and finding the best location for welding ... Institute of Australia, 2006 6-Zoran D.Perovic, The Weld Profile Effect On Stress Weldments, /Expert Concentration th 15 Factors International Conference (Trends in Research in The Development of Machinery ... equation (7)   r max   equ.(2) Kf =1+ q (Kt -1) equ.(7) The stress amplitude (σa) is one-half the range So that value of fatigue stress concentration of  stress a   r   in  max  one...

Ngày tải lên: 24/05/2014, 20:35

... initiation of a fatigue crack(s) and its (their) early growth and coalescence into a dominant fatigue crack The fatigue crack propagation portion of life (N ) is estimated using (long-crack) fatigue- crack ... recoverable life of ASTM A514/Ell0 butt welds "' "' ~ Ui 463 The initiation portion of life (N ) is estimated using strain-control faigue data and is considered to consist of the number of cycles for ... total fatigue life of welds has been developed (2) which assumes that the total fatigue life of a weldment {NT) is composed of a fatigue crack initiation period {NI) and a fatigue crack propagation...

Ngày tải lên: 24/05/2014, 20:36

... full-penetration welds in one pass on materials up to 1-in thick, depending on laser power and weld speed, with no filler and preparation as simple as precision cutting of the edges In addition, distortion ... additional stress-concentration factor due to eccentricity tolerance (used for plate connections only), Kta is the additional stress-concentration factor due to angular mismatch (used for plate connections ... stress-concentration factor is predominately controlled by the shape of the radius transition and not the size, Th, of the fillet 4.4 Relative fatigue- life predictions Fatigue- life predictions for...

Ngày tải lên: 24/05/2014, 20:40

... CFS One reason for confusion in endocrinologic research on fibromyalgia and CFS is the imprecise definition of the two conditions, their frequent overlap, and confounding psychiatric conditions ... luteinizing hormone Infusion of corticotropin-releasing hormone into the cerebral ventricles leads to inhibition of LH secretion in primates [11] Perturbations of HPA axis function have been described ... lack of abnormalities of hormones of the HPG axis in this study This is the first study comparing levels both of hormones of the HPG axis and of cortisol, which is the most important hormone of...

Ngày tải lên: 09/08/2014, 01:23

... provide no objective measurements of muscle contractile fatigue In addition, none of theses studies evaluated the effect of hypoxia on expiratory muscle fatigue Diaphragm fatigue following whole body ... interpretation of the data and drafting the manuscript BW was involved in the conception of the experiment, data collection and interpretation of the data All authors approved the final version of the ... quadriceps contractions under normoxic and hypoxic (arterial oxygen saturation, SpO2 = 75%) conditions and showed greater fatigability in hypoxia The effect of hypoxia on muscle fatigue may however...

Ngày tải lên: 12/08/2014, 11:22

... this unique cohort of patients, in particular with respect to complex wound management, infection and psychoemotional control According to the concept of a trimodal distribution of medical problems ... indicating when to consult professional support Upon federal request the Department of Psychotraumatology of the University of Heidelberg (Germany) assembled a comprehensive list of 400 qualified ... overlooked, as might people with pre-existing conditions [2] Conclusion Severe large scale soft-tissue damage, including high-level contamination, was common to all tsunami victims repatriated from...

Ngày tải lên: 25/10/2012, 10:41

... interventions are developed that reduce consecutive work hours to ensure the safety of patient care We believe, however, that development of ‘a sense of professionalism’ is not a function of whether ... Available online http://ccforum.com/content/9/5/528 We agree with the recommendation that further research should study the effects of sleep deprivation and work schedule interventions on the performance ... performance of upper-level residents and other medical staff across a variety of disciplines We likewise agree that optimizing patient handoffs, medical education, and trainees’ sense of professionalism...

Ngày tải lên: 25/10/2012, 10:45

... examined consisted of severe calorie restriction along with vitamin supplements and administration of human chorionic gonadotropin (hCG), a hormone that encourages metabolic utilization of visceral ... Silveira A, Hansson LO, Pernow J, Ericsson CG, Hamsten A, Tornvall P Relation of hypertriglyceridemia to plasma concentrations of biochemical markers of inflammation and endothelial activation (C-reactive ... number of CD34-positive cells during treatment may provide an indicator of improvement of vascular health In our study, we analyzed the effect of weight loss on the improvement of lipid profile...

Ngày tải lên: 25/10/2012, 10:51

... with the hydroxyl group on the meta position) which is used in nasal decongestants and is not a constituent of C aurantium Because of the known cardiovascular effects of nor-epinephrine and ephedrine, ... the absorption of fats and carbohydrates [5] In spite of their widespread use and the lack of credible reports regarding adverse effects, controversy has existed regarding the safety of bitter ... to 0.81 + 0.04 Effect sizes were calculated for each of the analyses where data were separated by gender (Table 4) or caffeine consumption (Table 5) The effects based on number of subjects per...

Ngày tải lên: 25/10/2012, 11:10

... (ESCC) which consists of a 120-hr-infusion of 5-FU at 400 mg/m2/day in weeks 1, 2, and 7, infusion of CDDP at 40 mg/m2/day on the first day of week 1, 2, and 7, and concurrent radiation at 60 Gy ... Figure A course consisted of continuous infusion of 5-FU at 400 or 500-550 mg/m2/day for days 1-5 and 8-12, infusion of CDDP at 40 mg/m2/day on days and 8, and radiation at Gy/day on days to 5, ... study was conducted with the authorization of the institutional review board and followed the medical research council guidelines of Kobe University Determination of Plasma Concentration of 5-FU...

Ngày tải lên: 26/10/2012, 09:39

... procedure The effects of rapid infusion and dilution of the injection solution on phlebitis caused by VNR was evaluated in a rabbit model, as reported elsewhere [4] Briefly, test solutions of VNR or ... et al Effects of pH and osmolality on phlebitic potential of infusion solution for peripheral parenteral nutrition J Toxicol Sci 1998; 23: 77-85 Fonkalsrud EW, Murphy J, Smith FG Jr Effect of pH ... VNR or DXR infusion, respectively Effect of DEX on VNR-induced phlebitis A 0.6-mg/mL solution of VNR was infused over 30 at mL/kg/hr into the ear vein To clarify the effect of DEX on phlebitis caused...

Ngày tải lên: 26/10/2012, 09:57

... inhibitory effect [7] The number of mature liver schizonts increased in the presence of mAbs anti-CSP of P yoelii and the authors suggested that enhancement of infection could be a consequence of an ... deviation of the mean Int J Med Sci 2006, In order to investigate if antibodies were exerting an effect on invasion, serial dilutions of mAb anti-CSP were tested in the culture medium After synchronisation, ... contamination PCR reaction triplicates showed no major differences among them and expression levels of the internal control were similar in the different experiments The expression levels of csp...

Ngày tải lên: 02/11/2012, 10:14

... measure of the degree of LV dyssynchrony Furthermore, the shortening of diastolic time is an often overlooked mechanism of cardiac dysfunction The duration of diastole is a principal determinant of ... Society of Echocardiography Committee on Standards, Subcommittee on Quantitation of Two-Dimensional Echocardiogram: recommendations for quantitation of the left ventricle by two-dimensional echocardiography ... ventricular ejection and total LV systole (10,11) This effect of loading conditions on the duration of LV systole is a well documented finding in cardiac disease states with considerable afterload-mismatch...

Ngày tải lên: 05/11/2012, 11:32

... touch feel of herbs -learning and description of the smell of ethnic spices -red and green chili sauce -recapitulation of contents of the earlier lessons -practical exercises on using one’s senses ... tests were conducted twice, and between the sessions one group of the children (N = 35) received a lesson on the sense of taste, another group (N = 34) received a lesson on the sense of smell and ... was present in one of the lessons in the first education wave For the control group the corresponding change was 0.56 (effect of education, p = 0.24) Mean change in the number of positive answers...

Ngày tải lên: 03/04/2013, 21:07

... is the fact of considering only one of the channels in the regression (either the change, which given the MASTER THESIS: THE EFFECT OF EDUCATION ON ECONOMIC GROWTH negative correlation, would lead ... amelioration of older databases because of the use of surveys based on uniform classification systems of education over time and an intensified use of information by age groups It is based on three ... the whole population, confirming thereby my previous results Conclusion The literature on the effect of education on economic growth is far from achieving a definitive conclusion Through this article...

Ngày tải lên: 24/08/2013, 18:40

... tr.106-108 Ashley D.A., Doss B.D., and Bennett O.L (1965) Relation of cotton leaf area index to plant growth and fruiting, Agronomy Journal 57, pp 61-64 Gomez K Wanchai A and Gomez Arturo A (1984) ... A (1984) Statistical Procedures for Agricuktural Research, Awiley Interscience Publication JOHN WILEY & SONS Michigan State University (1986) MSTATC: Microcomputer statistical program experimental ... lá/ngy) mật độ gieo trồng khác nhau, Ninh Thuận, vụ đông xuân năm 2008/2009 Hiu sut quang hp giai on (ngy sau gieo) Mt (vn cõy/ha) 46 - 55 56 - 65 66 - 75 76 - 85 2,5 8,68 8,69 7,42 6,84 5,0 6,61...

Ngày tải lên: 28/08/2013, 14:15

... based on the ratio of carbon loss as CO2 to the carbon contained in the DF alone In our investigation, the concentrations of CO2 from about to 19% in the exhaust gas were detected during each of ... composting runs Conversion of carbon of the three composting runs As the initial and final carbon contents in the composting raw materials were assessed on the solid basis before and after each of the ... respectively, the conversion of carbon, the initial carbon content in the raw mixture and the carbon remaining after the composting Nakasaki et al (1998a) reported that the conversion of carbon during the...

Ngày tải lên: 05/09/2013, 08:40

... Amount of Organic Carbon/amount of PAC ( mg g-1) adsorption capacity of PAC does not totally due to the adsorption of DOM on PAC 10 AC AC AC AC PAC on P on P on P on P ion ion tion New tion ba ... aeration tank 3rd incubation of glucose on PAC 4th incubation of glucose on PAC 10 0.1 10 100 1000 -1 E quilibriumC oncentration of 3,5-D P（m l ) C g Figure Adsorption isotherm of 3,5-DCP onto ... is to clarify the effect of DOM and biofilm on the adsorption capacity of PAC in the aeration tank of PACT process Materials and methods 2.1 Operation of powdered activated carbon treatment (PACT)...

Ngày tải lên: 05/09/2013, 08:40

... PCB solutions Effect of Initial PCB Concentration The results of the degradation of PCBs at different initial concentrations are shown in Figs and In all the initial PCB concentrations used, ... degradation In this study, effective degradation was obtained at H2O2 concentration of about 2800 ml (of the 30%H2O2 solution) per liter and initial PCB concentration of about 40 ppm The initial pH of ... degradation in this study was basically photolysis The objective of this study is to determine the effects of initial H2O2 concentration, initial pH of the solution and initial PCB concentration on...

Ngày tải lên: 05/09/2013, 09:08

... reduce the effectiveness of disinfectants Therefore, in this study, we examined the effects of turbid substances in suspensions of C parvum oocysts on the degree of UV inactivation of the oocysts ... excystation rate of the UV-irradiated sample and V0 is the excystation rate of the control sample that was not subjected to UV irradiation RESULTS AND DISCUSSION Effects of various substances on UV ... added to suspensions of C parvum oocysts and the efficacy of UV irradiation in inactivating the oocysts was studied Substances added and conditions of UV irradiation in each of the 13 experiments...

Ngày tải lên: 05/09/2013, 09:08