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Unformatted text preview: 11-7-07: Mechanical ResponseWhen we talk about the mech response of diff materials and devicesmore than just bridges and planesmechanical response of materials and certain devices and productswe will go into detail to what happens when you have a device that is heated up and cooled downputting stress on devicesthe possibilities of success and failures.BridgesStrong so safety is not compromised.AirplaesAluminum alloy or carbon compositesLightweightStrongCyclic loading during take-off and landing.Sports equipmentStrengthWeightImpact strengthElectronic DevicesWithstand stressed developed during heating and cooling.Optical fibersStrength to withstand stresses encountered during appliciation.Made out of glassstrong but not ductileHard drivesAl alloy or glass-ceramicStrong enough not break or crack during operation/rotation at high speedsThe disck is moving really fast100 miles per hourMEMS & NEMS Robust so they will not fail. Gears made in nano scale but operate in micronscale. ImplantsTi alloys (biocompatible)Strength and toughnessLast for many yearsWhat is strong?Design rulesStrongStiffDuctileToughStress (Cause)Stress (sigma)=Force (N)/Area (m2)Pa: N/m2MPa=106PaGPa= 10...
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- Fall '07