Lub tensile zog ntawm roj hmab
Kev sim ntawm tensile zog ntawm vulcanized roj hmab
Txhua yam khoom siv roj hmab yog siv nyob rau hauv qee qhov kev quab yuam sab nraud, yog li nws yuav tsum tau hais tias cov roj hmab yuav tsum muaj qee yam ntawm lub cev thiab lub zog, thiab kev ua tau zoo tshaj plaws yog kev ua haujlwm tensile.Thaum ua tiav cov khoom zoo soj ntsuam, tsim cov qauv roj hmab cov ntaub ntawv, txiav txim siab cov txheej txheem, thiab sib piv cov roj hmab aging kuj thiab nruab nrab kuj, nws yog feem ntau yuav tsum tau soj ntsuam lub tensile kev ua tau zoo.Yog li ntawd, tensile kev ua tau zoo yog ib qho ntawm cov khoom tseem ceeb ntawm cov roj hmab.
Kev ua haujlwm tensile suav nrog cov khoom hauv qab no:
1. Tensile stress (S)
Qhov kev ntxhov siab tsim los ntawm tus qauv thaum lub sij hawm ncab yog qhov sib piv ntawm qhov kev siv quab yuam mus rau qhov pib ntu ntu ntawm cov qauv.
2. tensile stress ntawm ib tug muab elongation (Se)
Lub tensile kev nyuab siab uas qhov ua haujlwm ntawm cov qauv yog ncab mus rau qhov muab elongation.Common tensile stresses muaj xws li 100%, 200%, 300%, thiab 500%.
3. Tensile zog (TS)
Qhov siab tshaj plaws tensile kev nyuab siab uas tus qauv yog ncab kom tawg.Yav tas los hu ua tensile zog thiab tensile zog.
4. Qhov feem pua Elongation (E)
Lub deformation ntawm qhov chaw ua hauj lwm tshwm sim los ntawm lub tensile specimen yog qhov piv ntawm qhov increment ntawm elongation mus rau qhov pib ntev feem pua.
5. Elongation ntawm ib qho kev ntxhov siab (piv txwv li)
Lub elongation ntawm cov qauv nyob rau hauv ib tug muab kev nyuaj siab.
6. Elongation thaum so (Eb)
Lub elongation ntawm tus qauv thaum tawg.
7. Txhaum mus tas li deformation
Nthuav cov qauv kom txog thaum nws tawg, thiab tom qab ntawd muab nws mus rau qhov seem deformation tom qab lub sijhawm (3 feeb) rov qab los hauv nws lub xeev dawb.Tus nqi yog qhov piv ntawm qhov incremental elongation ntawm qhov chaw ua haujlwm rau qhov pib ntev.
8. Tensile zog thaum tawg (TSb)
Lub tensile kev nyuaj siab ntawm ib tug tensile qauv ntawm tawg.Yog hais tias tus qauv txuas ntxiv mus txuas ntxiv tom qab qhov taw tes tawm los thiab nrog kev txo qis hauv kev ntxhov siab, qhov txiaj ntsig ntawm TS thiab TSb txawv, thiab TSb tus nqi tsawg dua TS.
9. Tensile stress at yield (Sy)
Qhov kev ntxhov siab sib raug rau thawj qhov taw tes ntawm qhov kev ntxhov siab-txoj kev nkhaus qhov twg qhov kev nyuaj siab ntxiv ntxiv tab sis qhov kev ntxhov siab tsis nce ntxiv.
10. Elongation ntawm yield (Ey)
Cov strain (elongation) sib raug rau thawj qhov taw tes ntawm qhov kev ntxhov siab-strain nkhaus qhov twg strain ntxiv ntxiv tab sis kev ntxhov siab tsis nce.
11. Roj hmab compression mus tas li deformation
Qee cov khoom siv roj hmab (xws li cov khoom sib khi) yog siv rau hauv lub xeev compressed, thiab lawv cov compression kuj yog ib qho ntawm cov khoom tseem ceeb uas cuam tshuam rau cov khoom zoo.Lub compression kuj ntawm roj hmab feem ntau ntsuas los ntawm compression mus tas li deformation.Thaum cov roj hmab nyob rau hauv lub xeev compressed, nws inevitably undergoes lub cev thiab tshuaj hloov.Thaum lub compression quab yuam ploj mus, cov kev hloov no tiv thaiv cov roj hmab rov qab mus rau nws qhov qub, uas ua rau compression deformation mus tas li.Qhov loj ntawm compression mus tas li deformation nyob ntawm qhov kub thiab lub sijhawm ntawm lub xeev compression, nrog rau qhov kub thiab lub sijhawm ntawm qhov siab rov qab los.Nyob rau hauv qhov kub thiab txias, tshuaj hloov pauv yog lub ntsiab ua rau compression mus tas li deformation ntawm roj hmab.Compression mus tas li deformation yog ntsuas tom qab tshem tawm cov compressive quab yuam siv rau cov qauv thiab kho qhov siab ntawm tus qauv kub.Ntawm qhov kub thiab txias, qhov kev hloov pauv tshwm sim los ntawm glassy hardening thiab crystallization yog qhov tseem ceeb hauv kev sim.Thaum qhov kub thiab txias, cov teebmeem no ploj mus, yog li nws yuav tsum tau ntsuas qhov siab ntawm cov qauv ntawm qhov ntsuas kub.
Tam sim no muaj ob lub teb chaws tus qauv rau kev ntsuas qhov compression tas li deformation ntawm roj hmab hauv Suav teb, uas yog kev txiav txim siab ntawm compression mus tas li deformation ntawm chav tsev kub, kub, thiab kub kub rau vulcanized roj hmab thiab thermoplastic roj hmab (GB / T7759) thiab txoj kev txiav txim siab rau tas li deformation compression tas li deformation ntawm vulcanized roj hmab (GB / T1683)
Post lub sij hawm: Apr-01-2024
