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Last updated on April 17, 2014 at 21:23 EDT

Latest Elasticity Stories

2008-09-12 03:00:17

By Schroeter, Christiane Lusk, Jayson L With this study, we investigate the effects of changes in economic factors on body weight by constructing a utility theoretic model. The model is empirically estimated by combining data on individuals' body weight, demographic and physical activity information, and state-level measures pertaining to the prices of food away from home, food at home, and wages. By combining these data sources, we aim to estimate directly the weight effects of price and...

2008-09-05 03:00:22

By Timelli, Giulio Lohne, Otto; Arnberg, Lars; Laukli, Hans Ivar The influence of solution heat treatment time and temperature on the microstructure and mechanical properties and the mode of fracture of a high-pressure die-cast AlSi7MgMn alloy is reported. Metallographic and image analysis techniques have been used to quantitatively examine the microstructural changes occurring during solution heat treatment. A solution heat treatment of 15 minutes at 475 [degrees]C, or even more at 525...

2008-09-05 03:00:20

By Majumdar, Shrabani Bhattacharjee, D; Ray, K K The micromechanism of fatigue damage in an interstitial-free (IF) steel sheet has been studied using fully reversed stress amplitudes (Deltasigma/2). The stress-life (S-N) curve of the steel sheet has been generated, together with a series of interrupted fatigue tests at each of the chosen Deltasigma/2, to study the progress of fatigue damage in terms of the initiation, growth, and coalescence of the fatigue cracks on the surfaces of the...

2008-09-03 03:00:16

By Kundu, S Chatterjee, S; Olson, D; Mishra, B In the present study, copper was used as an intermediate material in diffusion bonding between titanium and stainless steel. The process was carried out in the temperature range of 850 [degrees]C to 1000 [degrees]C for 60 minutes and at 900 [degrees]C for 30 to 150 minutes under the compressive stress of 3 MPa in a vacuum. The effects of temperature and time on the microstructure of Ti | Cu | stainless steel diffusion-bonded joints were...

2008-08-11 12:00:00

By K.R. Balasubramanyam At current price levels, consumers do not seem to be charmed by gold. The import of the yellow metal has declined substantially since January this year if Bombay Bullion Association figures are anything to go by. In the six months since January, India imported 162.20 tonnes of gold as against 313 tonnes during the same period last year that's a staggering 48 per cent drop. A leading jeweller in Bangalore says the demand is dipping due to soaring prices, which stood...

2008-07-24 03:00:55

By Lee, Kyuhong Lee, Sang-Bok; Lee, Sang-Kwan; Lee, Sunghak In the present study, a Zr-based amorphous alloy matrix composite reinforced with tungsten continuous fibers was fabricated without pores or defects by a liquid pressing process; the microstructures and mechanical properties of the fibers were investigated. Approximately 60 vol pct of the fibers was distributed inside the amorphous matrix, although the matrix of the composite also contained a small number of polygonal crystalline...

2008-07-24 03:00:47

By Winkler, S Thompson, A; Salisbury, C; Worswick, M; Van Riemsdijk, I; Mayer, R In order to understand the crashworthiness and formability of advance high-strength steels, the effects of strain rate and temperature on the constitutive response of DP 600 and DP 780 steel tubes were investigated and compared with commercial drawing quality (DQ) and high strength low alloy (HSLA) 350 steel tubes. Uniaxial tensile tests were conducted at quasi-static (QS) (0.003 and 0.1 s^sup -1^),...

2008-07-18 03:00:39

By Tartaglia, John M Lazzari, Kristen A; Hui, Grace P; Hayrynen, Kathy L This study was conducted to compare the hydrogen embrittlement (HE) resistance of austempered 4340 steel with quenched and tempered (Q&T) 4340 steel with an identical yield strength (YS) of 1340 MPa (194 ksi). A baseline comparison showed that the austempered steel with a lower bainite microstructure exhibited higher hardness, tensile strengths, Charpy V-notch (CVN) impact toughness, and ductility at both low 233 K...

2007-03-27 06:00:17

By Gupta, Nikhil; Lin, Tien Chih; Shapiro, Michael The work described in this paper is focused on evaluating the effect of the processing method and nanoclay (montmorillonite) content on the tensile, compressive, and impact properties of clay- epoxy nanocomposites. Nanocomposites are synthesized by two methods: mechanical mixing and shear mixing. Both these methods are capable of producing bulk quantities of clay-epoxy nanocomposites. X-ray diffraction analysis indicates that the nanoclay...