What is yield stress of material?Question 6Select one:a.A limit stress above of which the material become a liquidb.A limit stress above of which the material will be deformable plasticallyc.A limit stress above of which will material structure change

What happens to the stress and strain within a material when it reaches its elastic limit?

In a metal forming operation when the material has just started yielding, the principal stresses are: σ 1 = +180MPa,σ2 = -100 MPa, σ3 = 0 Following Von Mises criterion, the yield stress is ________ MPa

Plastically deforming a metallic material at room temperature will...Question 8Select one:a.Decrease its yield strength, but increase its uniform strainb.Increase its yield strength, and leave uniform strain unaffectedc.Decrease its yield strength, and leave uniform strain unaffectedd.Decrease both its yield strength and uniform straine.Increase its yield strength, but decrease its uniform strainf.Increase both its yield strength and uniform straing.Leave its yield strength unaffected, but decrease its uniform strainh.Leave its yield strength unaffected, but increase its uniform strain

What is the design approach forile materials to prevent plastic deformation or failure under static loads?AKeep stress levels well below ultimate tensile strengthBEnsure stress levels are below yieldCAnalyze deflection where safety is criticalDAddress fatigue for cyclic loadingWhy is it important to keep stress levels well below ultimate tensile strength for brittle materials?ATo address fatigueBTo prevent sudden fractureCTo analyze deflectionDTo ensure plastic deformationWhen designing components, why is deflection analysis crucial?ATo prevent sudden fractureBExcessive deflection can lead to structural instabilityCTo address wear in machine elementsDTo ensure stress levels are above yieldWhat is the definition of fatigue in the context of machine components?ADesign approach for ductile materialsBResponse of a part to repeated loadsCImportance of keeping stress below ultimate tensile strengthDAnalyzing deflection in critical partsWhat is the definition of fatigue in the context of machine components?ADesign approach for ductile materialsBResponse of a part to repeated loadsCImportance of keeping stress below ultimate tensile strengthDAnalyzing deflection in critical partsWhere is wear typically discussed in relation to machine components?AIn deflection analysisBChapters related to machine elements like gears, bearings, and chainsCIn stress analysis for ductile materialsDIn the design approach for brittle materialsWhat is the objective of stress analysis in load-carrying members?APrevent plastic deformationBIdentify the point experiencing the highest stressCAnalyze deflectionDAddress fatigue issuesWhat is the purpose of developing visualization in structural analysis?ATo align stress elements with axesBoptimize structural designCTo mentally picture stress elementsDTo analyze shear stressesIn stress and deformation analysis, what do tensile stresses tend to do to an element?ACrush itBPull on itCCut itDTwist it

Discuss the role that stress concentrations can have on material failure. Give an exampleof a good design principle that minimises stress concentrations.