MSE4020Fall2011-Quiz8-Solutions

MSE4020Fall2011-Quiz8-Solutions - Mini Quiz#9 September...

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Unformatted text preview: Mini Quiz #9 September 27,2011 q, LA I’llIIIIIIIIIIIIIIII’IIII} (Type your name) - 1) The figure below is from a recent publication by Electrical Engineers: 0.6 fl“! ' 'gsléiolrtyfi'lfiflizfi n2 »» ' on. «43.2. «€14 41.6 v- ' i 5 tension ‘, Emits-1m» at island came an ' : 'shozrt?‘§inng w.) t. l =I . E: uh l . 1rd .11 {stand short eige‘ileugfla, Lgbmfpm} FIG; Méeaiéiureri anisotropic Siffre strain at the center of resignang as islands. with 1216,15: BED Man are Shoat. isla'mfi length aft-es a 534mm anneal 151:} °C. The layer structure .Eh-Lit‘siifi in the ' x E inset. Siysnbtzt'ls; infinite 85%” "fps islands aligneé. along {open along squares): the lines;- asre- adsawn from point En point. 'bntb names;E 31mg {$0le Circles; as :fixerfi at afl=~3£% by the large ng prevents 1531 fixation. The inset " ' ‘th {1 emails of the Poisson effect acting on. :1 rectangular is‘la‘nfi; compassion in lung {inaction {emits in extension. in the short disarming}. Why are electrical engineers interested in the stress details in Si-Ge single crystal islands? V (Limit your answer to one sentence) .... .... .... .............................................................................................................................................. .. Mini Quiz #10 September 29,2011 IIIIIIIIIIIIIIIIIIIIII/III (Type your name) 1. What is the dominant technique used to measure elastic constants? 2. 3. What is the Cauchy relation for cubic crystals ? In the class example the Air Force sponsored research on third order elastic constants of Al 3) To better understand the atomic potentials of Aluminum b) To measure the phase velocity of acoustic waves in Aluminum c) To measure the second order harmonic generation of vibrations in Aluminum d) ~ To measure internal stresses of Aluminum To measure fatigue damage bf Aluminum ...
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