Los ntawm cov lus pom zoo, qhov kev sib tw yog teem rau kab rov tav thiab kev ntxhov siab yog teem rau ntsug axis. Nco ntsoov tias rau lub hom phiaj engineering peb feem ntau xav tias qhov chaw hla ntawm cov khoom tsis hloov thaum lub sij hawm tag nrho cov txheej txheem deformation.
Koj pom kev nyuaj siab li cas?
Kev nyuaj siab
- Kev ntxhov siab txhais tau tias yog lub zog ntawm ib chav tsev ntawm cov khoom siv.
- i.e. Kev ntxhov siab=quab yuam / hla ntu:
- Txoj kab mob txhais tau tias yog txuas ntxiv rau ib chav ntev.
- Strain=extension / thawj qhov ntev.
- Txoj kab tsis muaj units vim nws yog qhov piv ntawm qhov ntev.
Kev ntxhov siab-kev nkhaus nkhaus nyob qhov twg?
Txoj kev ntxhov siab-txoj kab nkhaus xaus (ntawm lub zog tensile kawg Su), thaum tus qauv ua tsis tiav, los ntawm kev tawg lossis kev tawm los. Yog hais tias nws ua tsis tau zoo los ntawm yielding, tus qauv caj dab, thinning nonuniformly raws li qhia nyob rau hauv daim duab 1.27.
Txoj kev mob twg ua rau muaj kev ntxhov siab?
Nyob rau hauv kev teb rau kev ntxhov siab, pob zeb yuav raug peb hom kev sib txawv - elastic strain, ductile strain, lossis tawg
- Elastic strain yog thim rov qab. Pob zeb uas tau dhau los tsuas yog elastic strain yuav rov qab mus rau nws qhov qub yog tias qhov kev ntxhov siab raug tso tawm.
- Ductile hom yog irreversible. …
- Fracture tseem hu ua rupture.
Koj pom qhov mob li cas?
Txoj kab mob tsuas yog qhov ntsuas ntawm qhov ntau npaum li cas cov khoom yog ncab lossis deformed. Kev mob tshwm simthaum quab yuam siv rau ib yam khoom. Cov kab mob feem ntau cuam tshuam nrog kev hloov ntawm qhov ntev ntawm qhov khoom. Strain=Δ L L=Hloov Length Original Length.
