材料力学简介(英文)

TheIntroduction

ofMechanicsofMaterials陈继乐1.Theresearchobjectof

Mechanicsof

Materials2.Thetaskof

Mechanicsof

Materialsanditsrelationwithengineering3.Thepropertiesandthefundmentalassumptionsofthesoliddeformablebodies4.Basictypesof

thedeformationofrods1.The

research

object

of

Mechanics

of

Materials·Structure

members·Classificationofstructuremembers:plateor

shellclump

bodybar

or

rod2.Thetaskof

Mechanicsof

Materialsanditsrelationwithengineering·Strength,Rigidity,StabilityStrength:Capacitytoresistfailureof

acomponentor

an

element.Rigidity:Capacitytoresistdeformationsof

acomponentor

anelement.Stability:Capacitytoremaintheoriginalstateinequilibrium

of

acomponentoran

elementThe

tasks

of

mechanics

of

materialsUnder

the

request

that

the

strength,rigidity,stabilityare

satisfied,offerthenecessarytheoretical

foundationandcalculationmethodfordeterminingreasonableshapes

and

dimensions,choosingpropermaterials

forthecomponentsatthemosteconomicprice.3.Thepropertiesandthefundmentalassumptionsof

thesoliddeformablebodies1.Continuity:Thematerialof

asoliddeformable

bodyiscontinuouslydistributedoverits

volume

so

that

there

arenot

any

cracks,defects

orholes

etc

.2.Homogeneity:Thematerial

of

the

soliddeformablebodyishomogeneouslydistributedoveritsvolume.

3.Isotropy:Themechanicalpropertiesarethesamein

alldirectionsat

apoint.4.Smalldeformations:

Thedeformationsfora

soliddeformablecausedbyexternalforcesarevery

smallcompared

with

the

dimensions

of

the

body.Thus

whenwestudytheequilibriumandmotion

of

the

soliddeformable

body,the

deformation

of

the

body

may

beneglected.4.Basictypeso