研究机械专业外文翻译

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1、研究机械专业外文翻译研究机械专业外文翻译___残余应力导读：stitialatom,dislocationandsoon)cause.Inthedistortionmetalthestoragecanthemajorpart(80%~90%)usesinformingthelatticedistortion.Thispartofenergyenhancedthedistortioncrystalenergy,causesittobeatthethermodynamicsnon-steadystate,thereforeithasonekindtomaket中文

2、2748字附录ResidualStressesAresidualstressisonethatexistsperaturedifferencesonastructureormachine.Itisusuallyaresultofmanufacturingorassemblingoperations.Sometimesitiscalledinitialstress,andtheoperations,prestressing.achineisputintoservice,theserviceloadssuperimposestresses.Iftheresidua

3、lstressesaddtotheservice-loadstresses,theyaredetrimental;iftheysubtractfromtheservice-loadstressestheyarebeneficial.Intheplasticdeformationtheexternalforcedoesthemeritturnsintooutsidetheheatexceptthemajorityofextensions,butalsosomesmallpartbythedistortioncantheformstoresupinthedefor

4、mationmaterial.Thispartofenergynamedstorageenergy.Thestoragecantheconcretemanifestationicroscopicresidualstressandlatticedistortion.Accordingtotheresidualstressbalancescopedifference,usuallymaydivideintoitthreekinds:(1)Firstkindofinternalstress,alsocalledthemacroscopicresidualstress

5、,itiscausesbytheacroscopicdistortionnonuniformity,thereforeitsstressbalancescopeincludingentireple,servesitofelasticityhashadtheplasticdeformation,afterthentheexternalforceeliminationbyelongatedonesideontheexistencepressedstress,thelegofrighttriangleisthetensilestress.Thiskindofresi

6、dualstresscorrespondsthedistortioncannotbebig,onlyaccountsforalicroscopicresidualstress,itisproducesbybetity.Itssphereofactionandthecrystalgrainsizequite,namelymaintainthebalancebetetimesthiskindofinternalstressmayachievetheverygreatvalue,evenpossiblycreatesthemicrocrackandcausesthe

7、eters,itisbecausethesintheplasticdeformationthemassivelatticeflaplevacancy,interstitialatom,dislocationandsoon)cause.Inthedistortionmetalthestoragecanthemajorpart(80%~90%)usesinformingthelatticedistortion.Thispartofenergyenhancedthedistortioncrystalenergy,causesittobeatthethermodyna

8、micsnon-steadystate