《工程力学（国际化课程）》课件-Module 26 Learning Outcomes

EngineeringMechanics

20xx-x-xModule26LearningOutcomesDescribethedifferencesbetweenanalysisanddesignDefinetheFactorofSafetyListtypicalvaluesfortheFactorofSafetyAnalysisAnalyze,

evaluate,

and/or

predictthe

behaviorofan

engineeringcomponentorstructure

based

onperformance

criteriaand/or

industry

standards.DesignCreatea

newengineering

component

orstructurethatwill

meet

specifications

and

performance

criteria.“Thescientistdescribeswhat

is.Theengineercreateswhat

never

was.”“Applicationofscience

to

fill

a

human

need”——TheodorevonKarman-Hungarian-American

physicistandaeronauticalengineerWhat

Do

Engineers

Do?HongKong-Zhuhai-MacaoBridge(HZMBridge）China'slongestcross-seabridgewithatotallengthof55kilometerswonthe“2020InternationalBridgeConference(IBC)SuperProjectAward”FoS

>1

Thedesignerdefinesfailure：component/structuredoesn’tmeetperformancecriteria;e.g.excessivedeformation,fracture,etc.Thedesign

criteriatheengineeringcomponent/structure

must

achieveFactorofSafety(FoS)avoids

failureavoids

failureTypicalValuesfortheFactorofSafety(FoS)Use

higher

FoSfor

brittle

materials

(to

avoid

catastrophicfailure)Use

lowerFoSwhenusing

materialsforwhich

the

material

propertiesareverywell

knownUse

higher

FoSfor

uncertainenvironments/stressesBuildings

FoS

≥

2Automobiles

FoS

≥3Aircraft/Spacecraft

FoS

≥

1.2

to

2.5Boilers/PressureVessels

FoS

≥

8.5LiftingEquipment/Hoos

FoS

≥

8

to

9Bolts

FoS

≥

8.5In

General:Myemphasiswillbeonunderstandingtheprinciplesofmechanicsof