Modulus ntawm Elasticity vs Modulus ntawm Rigidity | Elastic Modulus vs Shear Modulus
Modulus ntawm elasticity thiab modulus ntawm rigidity yog ob yam khoom ntawm teeb meem. Cov khoom no tseem ceeb heev hauv kev tsim thiab siv cov tshuab thiab cov qauv tsim. Cov ntsiab lus no tseem ceeb heev rau kev nkag siab txog cov tshuab tsim nyog thiab statics ntawm cov khoom siv. Txhawm rau kom muaj kev nkag siab meej hauv cov haujlwm xws li engineering thiab physics, yuav tsum muaj kev nkag siab meej hauv cov ntsiab lus no. Hauv tsab xov xwm no, peb yuav tham txog dab tsi modulus ntawm elasticity thiab modulus ntawm rigidity yog, lawv cov kev siv, cov ntsiab lus ntawm modulus ntawm elasticity thiab modulus ntawm rigidity, lawv qhov sib txawv thiab thaum kawg qhov txawv ntawm ob.
Modulus ntawm Rigidity (Shear Modulus)
Shear stress yog lub zog deformation. Thaum lub zog yog siv tangential rau ib qho khoom nto, cov khoom zoo li "twist". Txhawm rau ua qhov no, cov khoom yuav tsum tau kho, kom nws tsis tuaj yeem txav mus rau qhov kev taw qhia ntawm lub zog. Chav tsev ntawm kev ntxhov siab yog Newton ib 'meter' squared lossis feem ntau hu ua Pascal. Peb paub tias Pascal kuj yog chav tsev ntawm lub siab. Txawm li cas los xij, lub ntsiab lus ntawm lub siab yog lub zog ib txwm rau qhov chaw faib los ntawm cheeb tsam, qhov txhais ntawm kev ntxhov siab yog qhov quab yuam sib npaug mus rau qhov chaw ntawm ib cheeb tsam. Torque ua raws li qhov khoom ruaj khov tuaj yeem tsim kev ntxhov siab. Los ntawm kev txhais, tsis tsuas yog cov khib nyiab tab sis kuj cov kua dej tuaj yeem muaj kev ntxhov siab shear. Cov khoom muaj ib lub cuab yeej hu ua shear modulus, uas qhia peb tias qhov khoom yuav txav deb npaum li cas rau qhov muab kev ntxhov siab. Qhov no nyob ntawm cov duab, qhov loj me, cov khoom siv thiab qhov kub thiab txias ntawm cov khoom. Shear stress of constructions and automobile engineering plays lub luag haujlwm tseem ceeb hauv kev tsim thiab siv cov qauv tsim.
Modulus ntawm Elasticity
Elasticity yog ib yam khoom muaj txiaj ntsig zoo ntawm cov teeb meem. Nws yog lub peev xwm ntawm cov ntaub ntawv rov qab mus rau lawv qhov qub qub tom qab txhua qhov kev tawm tsam sab nraud raug tshem tawm. Nws tau pom tias lub zog yuav tsum tau ua kom tus pas nrig elastic ncab yog proportional rau qhov ntev ntawm tus pas nrig. Modulus ntawm elasticity yog qhov nyiam ntawm cov khoom kom deform elastically thaum siv lwm lub zog. Lub ntsiab txhais ntawm lub elastic modulus yog qhov piv ntawm kev nyuaj siab rau lub strain. Kev ntxhov siab yog lub zog rov qab los ntawm kev deformation ntawm cov molecules. Kev ntxhov siab yog muab raws li lub siab. Lim yog qhov piv ntawm qhov ntev deformed rau qhov ntev ntawm qhov khoom. Lim yog ib qho dimensionless kom muaj nuj nqis. Yog li ntawd, modulus ntawm elasticity kuj muaj qhov ntev ntawm kev ntxhov siab, uas yog Newton ib square meter los yog Pascal.
Qhov txawv ntawm modulus ntawm elasticity thiab modulus ntawm rigidity yog dab tsi?
• Modulus ntawm rigidity siv tau rau ob qho tib si elastic thiab tsis-elastic deformations thaum modulus ntawm elasticity tsuas yog siv tau rau elastic deformations.
• Elastic deformation yog txhais rau lub zog ib txwm rau ntawm qhov chaw thaum modulus ntawm rigidity yog txhais rau cov rog ua raws li qhov sib npaug rau nws.
• Lub deformation rau lub modulus ntawm elasticity yog linear thaum lub deformation rau lub modulus ntawm rigidity yog ib ncig.
