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Latest Deformation Stories

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2009-09-14 08:41:53

Crash tests often produce startling results. A new simulation process which factors in deformation during production as well as preliminary damage can predict the results of a crash test more accurately than ever. There are components that save lives: if a car rolls over during an accident, the "ËœB-pillar' plays a key role. It forms one of the connections between the floor and roof of the vehicle and is designed to prevent the passenger cell from deforming too much. The materials...

2009-01-26 14:11:37

U.S. scientists say they have created stretchable electronics that allow extreme bending and straining without a reduction in performance. University of Miami Professor Jizhou Song, Professor John Rogers at the University of Illinois and Northwestern University Professor Yonggang Huang said they developed a new design for stretchable electronics that can be wrapped around complex shapes, without a reduction in electronic function. The researchers said the new strategy is based on...

2008-10-02 03:00:20

By Phillion, A B Lee, P D; Maire, E; Cockcroft, S L Semisolid tensile testing combined with X-ray microtomography (XMT) was used to characterize the development of internal damage as a function of strain in an aluminum-magnesium alloy, AA5182. Novel techniques were developed to allow the quantification of both the size evolution and orientation of the damage to determine mechanisms controlling the early stage growth and localization. During the initial stages of semisolid deformation, it...

2008-09-13 03:00:11

By Fukuta, Satoshi Asada, Fumihito; Sasaki, Yasutoshi Abstract The impact of holes drilled into air-dried wood specimens was examined in a closed heating system on the deformation fixation process of compressed wood. Holes were drilled into wood to improve steam permeability, and therein, improve manufacturing efficiency in comparison to conventional processes. The impact of drilled holes on the permeability of water in wood was also examined. The deformations of the wood specimens in the...

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...

2008-07-26 03:00:29

By Mintz, B Gunawardana, W D; Su, H The influence of Al on the strength and impact properties of hot rolled plain C-Mn low S steels has been examined at two C levels, 0.02 and 0.1% and two N levels, 0.001 and 0.004-0.005% (where percentage is to be taken as wt-%). It has been found that Al is an excellent element to add to hot rolled steels, an addition of 0.2% to a plain 0.1C-1.4Mn steel with 0.004-0.005%N resulting in an impact transition temperature of -95[degrees]C at a strength level...

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...

2008-02-29 03:00:27

By Das, S Singh, S B; Mohanty, O N; Bhadeshia, H K D H The basic science behind bake hardening steels is well understood in terms of the interactions between interstitial solutes and dislocations. However, the manufacture of such alloys involves a variety of other variables, the interactions between which are influential in controlling the extent of hardening. In the present work, a model which includes the chemical composition of the steel, the strain before aging and the annealing and...

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...


Word of the Day
cacodemon
  • An evil spirit; a devil.
  • A nightmare.
  • In astrology, the twelfth house of a scheme or figure of the heavens: so called from its signifying dreadful things, such as secret enemies, great losses, imprisonment, etc.
'Cacodemon' comes from a Greek term meaning 'evil genius.'
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