Qhov Tseem Ceeb Qhov txawv - Isotropic vs Orthotropic
Hauv cov ntaub ntawv tshawb fawb, ob qho tib si cov ntsiab lus "isotropic" thiab "orthotropic" muaj feem xyuam rau cov khoom siv hluav taws xob thiab thermal raws li peb cov lus qhia, tab sis muaj qhov sib txawv ntawm ob nqe lus no. Qhov sib txawv tseem ceeb ntawm cov ntaub ntawv isotropic thiab orthotropic yog tias isotropic txhais tau tias muaj tus nqi tib yam rau cov khoom siv hluav taws xob thiab cov thermal hauv txhua qhov kev qhia, thiab orthotropic txhais tau tias tsis muaj nqi tib yam hauv txhua qhov kev qhia.
Cov Khoom Siv Isotropic yog dab tsi?
Lub ntsiab lus ntawm "isotropy" yog ib yam nyob rau hauv tag nrho cov kev taw qhia; lo lus no yog muab los ntawm ob lo lus Greek "isos" (sib npaug) thiab "tropos" (txoj kev). Lo lus no yog siv rau ntau qhov chaw, thiab nws lub ntsiab lus hloov me ntsis nyob ntawm qhov chaw kawm. Mechanical zog ntawm cov ntaub ntawv isotropic tsis nyob ntawm qhov kev taw qhia; nyob rau hauv lwm yam lus lawv muaj zoo tib yam nqi nyob rau hauv tag nrho cov lus qhia. iav thiab hlau yog ob qho piv txwv ntawm cov ntaub ntawv isotropic.
Cov qauv microscopic ntawm cov ntaub ntawv isotropic tuaj yeem ua homogeneous lossis tsis sib xws; steel yog isotropic, tab sis nws cov qauv microscopic tsis yog homogenous.
Piv txwv ntawm cov khoom siv isotropic:
- Density
- Modulus ntawm Elasticity
- Thermal coefficient of expansion
- Poisson's Ratio
- Shear Modulus ntawm Elasticity
- Yield Strength
Nyob zoo ib tsoom niam txiv kwv tij neej tsas sawv daws
3D sawv cev ntawm cov kua siv lead ua kua hauv lub xeev isotropic
Cov Khoom Siv Orthotropic yog dab tsi?
Cov ntaub ntawv Orthotropic muaj cov khoom sib txawv raws li peb lub voj voos (axial, radial thiab circumferential). Feem ntau, cov ntaub ntawv no yog orthotropic thiab inhomogeneous. Qhov piv txwv tshaj plaws rau cov khoom siv orthotropic yog ntoo.
Qhov txawv ntawm Isotropic thiab Orthotropic yog dab tsi?
txhais ntawm Isotropic thiab Orthotropic
Cov Khoom Siv Isotropic: Cov khoom siv tau hais tias yog isotropic yog tias nws cov khoom siv hluav taws xob thiab thermal zoo ib yam hauv txhua qhov kev coj.
Cov Khoom Siv Orthotropic: Cov ntaub ntawv tau hais tias yog orthotropic yog tias nws cov khoom siv hluav taws xob thiab thermal sib txawv thiab ywj pheej nyob rau hauv tag nrho peb cov lus qhia.
yam ntxwv ntawm Isotropic thiab Orthotropic
Properties
Cov Khoom Siv Isotropic: Cov ntaub ntawv Isotropic muaj qhov tshwj xeeb rau cov khoom siv xws li qhov ntom ntom, qauv ntawm elasticity, thermal coefficient ntawm expansion, Poisson tus piv, damping, yield zog, thiab lwm yam.
Cov Khoom Siv Orthotropic: Cov ntaub ntawv Orthotropic tsis muaj qhov tshwj xeeb rau cov khoom siv thoob plaws hauv cov khoom.
Microscopic Structure
Cov Khoom Siv Isotropic: Cov ntaub ntawv Isotropic tuaj yeem ua homogeneous lossis tsis sib xws.
Cov Khoom Siv Orthotropic: Raws li tag nrho, cov ntaub ntawv orthotropic yog inhomogeneous.
dav hlau ntawm Symmetry
Cov Khoom Siv Isotropic: Cov ntaub ntawv Isotropic muaj cov dav hlau tsis kawg ntawm kev sib luag.
Cov Khoom Siv Orthotropic: Cov ntaub ntawv Orthotropic muaj peb lub dav hlau (los yog axes) ntawm symmetry.
Piv txwv ntawm Isotropic thiab Orthotropic Cov Khoom
Cov Khoom Siv Isotropic: iav, hlau
Cov Khoom Siv Orthotropic: Ntoo, ntau cov muaju thiab cov ntaub ntawv dov.
Image Courtesy: "Isotropic3d" los ntawm Stille - Tus kheej ua haujlwm. (CC BY-SA 3.0) via Wikimedia Commons “Taxus wood” los ntawm MPF – theej los ntawm en.wikipedia 17:13, 5 Kaum Ib Hlis 2004.. MPF.. 421 × 427 (38110 bytes) Thawj qhov chaw: Duab: MPF. (CC BY-SA 3.0) via Commons
