Cov yam ntxwv ntawm cov txheej txheem dabtsi yog khoov ntawm cov yeeb nkab dabtsi yog khoov tshuab

Kev khoov ntawm cov kav dej los ntawm cov yeeb nkab dabtsi yog khoov tshuab yog tib yam li kev khoov ntawm cov ntawv hlau. Nyob rau hauv cov ntaub ntawv ntawm ntshiab dabtsi yog khoov, thaum ib tug yeeb nkab nrog txheej txoj kab uas hla D thiab phab ntsa thickness t yog khoov nyob rau hauv qhov kev txiav txim ntawm ib tug sab nraud quab yuam M, lub sab nrauv phab ntsa ntawm lub nruab nrab txheej yog raug rau tensile kev nyuaj siab σ 1. Cov nyhuv yog nyias. cov yeeb nkab phab ntsa; Tensile kev nyuaj siab nyob rau hauv lub puab phab ntsa ntawm nruab nrab txheej σ 1. Qhov kev txiav txim thickens cov yeeb nkab phab ntsa. Ntxiv mus, cov duab ntawm tus ntoo khaub lig-section hloov los ntawm ncig mus rau kwv yees li elliptical vim yog kev sib xyaw ua ke F1 thiab F2. Thaum lub deformation loj dhau lawm, cov kab nrib pleb yuav tshwm rau ntawm phab ntsa yeeb nkab sab nrauv thiab wrinkles yuav tshwm rau ntawm phab ntsa hauv cov yeeb nkab.
Qhov degree ntawm deformation ntawm cov kav dej yog nyob ntawm tus txheeb ze dabtsi yog khoov vojvoog R / D thiab tus txheeb ze thickness t / D qhov tseem ceeb. Qhov me me ntawm R / D thiab t / D qhov tseem ceeb, qhov ntau dua qhov deformation. Txhawm rau kom ntseeg tau qhov zoo ntawm cov yeeb nkab sib sau, nws yog ib qho tsim nyog los tswj cov qib ntawm deformation nyob rau hauv qhov kev tso cai. Txoj kev khoov txoj kev txwv ntawm cov kav dej tsis yog tsuas yog nyob ntawm cov khoom siv thiab khoov txoj kev ntawm cov khoom, tab sis kuj txiav txim siab txog kev siv cov kev cai ntawm cov yeeb nkab fittings. Txoj kev txwv ntawm cov yeeb nkab fittings yuav tsum muaj cov ntsiab lus hauv qab no:
1) Qhov siab tshaj plaws elongation deformation nyob rau hauv lub tensile deformation cheeb tsam nyob rau sab nraud ntawm lub nruab nrab txheej tsis pub tshaj tus nqi yas tso cai ntawm cov khoom, ua rau tawg;
2) Nyob rau hauv lub compression deformation cheeb tsam nyob rau sab hauv ntawm lub nruab nrab txheej, lub nyias-walled structural qhov chaw raug rau tangential compressive kev nyuaj siab yuav tsum tsis txhob ntau tshaj instability thiab wrinkle;
3) Yog tias muaj qhov yuav tsum tau ua rau ellipticity nyob rau hauv cov yeeb nkab fittings, tswj cov distortion ntawm lawv cov hlaws;
4) Yog hais tias cov yeeb nkab fittings muaj lub zog yuav tsum tau tiv thaiv sab hauv siab, tswj qhov kev txwv ntawm phab ntsa thickness txo.