"Fracture toughness" piav qhia txog ua haujlwm ntawm cov khoom tawg mus rau kev nthuav tawm ntawm qhov tsis zoo nyob rau hauv kev siv kev ntxhov siab, thiab nws xav tias qhov tsis zoo ntev dua, qhov qis dua yog qhov kev ntxhov siab xav tau ua rau tawg. Lub peev xwm ntawm qhov tsis zoo los ua kom tawg yog nyob ntawm qhov tawg toughness ntawm cov khoom.
pob txha tawv qhia koj li cas?
Nyob hauv metallurgy, tawg toughness yog hais txog ib yam khoom uas piav txog lub peev xwm ntawm cov khoom uas muaj qhov tawg los tiv thaiv kev puas tsuaj ntxiv. Fracture toughness yog ib txoj hauv kev kom muaj nuj nqis ntawm kev nthuav qhia cov khoom tiv thaiv kom tawg tawg thaum muaj qhov tawg.
Yuav ua li cas puas muaj pob txha tawv tshaj plaws?
Metals tuav qhov zoo tshaj plaws ntawm pob txha toughness. Cov kab nrib pleb tsis tuaj yeem nthuav tawm yooj yim hauv cov ntaub ntawv tawv, ua rau cov hlau tiv taus tawg thaum muaj kev ntxhov siab thiab ua rau lawv txoj kev ntxhov siab-txoj kab nkhaus ib cheeb tsam loj ntawm cov yas ntws.
pob txha pob txha yog dab tsi?
Fracture toughness (krack-initiation toughness)
Muab nws tus yam ntxwv ntawm cov kev ntxhov siab hauv zos thiab cov kab mob ntawm qhov ntev piv rau qhov ntsuas ntawm cov xwm txheej hauv zos tawg, nws tuaj yeem suav tias ncav cuag tus nqi tseem ceeb, qhov tawg toughness, ntawm pob txha, K=Kc [39].
Yuav ua li cas thiaj ua tau pob txha tawv?
Kev kuaj pob txha toughness feem ntau muaj cov kauj ruam hauv qab no:
- Machining ntawm tus qauv kuaj qauv (feem ntau yog ib qho ntug-notched khoov lossis compact nro specimen), uas yog notched nyob rau hauv qhov kev txaus siab.
- Kev loj hlob ntawm kev qaug zog precrack los ntawm kev siv lub voj voog thauj khoom, feem ntau ntawm chav tsev kub.
