Carbon fiber rims have a greater impact on mechanical properties in terms of pore ratio and pore aspect ratio, pore size and distribution. It was also found that large pores (area >0.03 hli2) muaj kev cuam tshuam tsis zoo rau cov khoom siv kho tshuab, uas yog vim muaj kev cuam tshuam ntawm qhov hws ntawm kev tawg tawm ntawm cov kua nplaum uas nplua nuj ntawm cov khaubncaws sab nraud povtseg.
Qhov kev ncua deb ntawm cov khaubncaws sab nraud povtseg ntawm cov pa roj carbon fiber ntau yog li 3.39 txog 3.42A. Kev npaj ntawm cov pa roj carbon atoms ntawm cov txheej thaum uas tig mus tsis zoo li cov graphite, thiab cov khaubncaws sab nraud povtseg tau txuas ua ke los ntawm van der Waals rog.
Cov qauv ntawm carbon fiber rims feem ntau suav hais tias yog tsim los ntawm ob-dimensional xaj crystals thiab pores. Cov ntsiab lus, qhov loj me thiab kev faib tawm ntawm qhov pores muaj kev cuam tshuam ntau dua rau kev ua haujlwm ntawm cov pa roj carbon fiber ntau. Thaum lub porosity qis dua ib qho tseem ceeb, qhov pores Tus nqi tsis muaj kev cuam tshuam rau lub zog interlaminar shear, lub zog flexural thiab tensile lub zog ntawm carbon fiber rim composite cov ntaub ntawv.
Qee qhov kev tshawb fawb tau taw qhia tias qhov tseem ceeb ntawm qhov uas ua rau cov khoom siv hluav taws xob poob qis yog 1%-4%. Thaum lub pore ntim cov ntsiab lus nyob rau hauv thaj tsam ntawm 0-4%, rau txhua txhua 1% nce nyob rau hauv tag nrho cov pore ntim, lub interlaminar shear zog txo los ntawm kwv yees li 7%. Los ntawm kev tshawb fawb ntawm carbon fiber rim epoxy resin thiab carbon fiber rim dual maleimide resin laminates, nws tuaj yeem pom tias thaum lub porosity tshaj 0.9%, interlaminar shear zog pib txo. Nws yog paub los ntawm kev sim uas qhov pores feem ntau yog faib ntawm fiber ntau thiab ntawm qhov sib cuam tshuam ntawm txheej. Thiab qhov siab dua cov ntsiab lus ntawm qhov pore, qhov loj ntawm qhov pores thiab txo qhov chaw ntawm interlayer interface hauv laminate. Thaum cov khoom muaj kev ntxhov siab, nws yooj yim rau kev puas tsuaj ntawm cov khaubncaws sab nraud povtseg, uas yog vim li cas lub interlayer shear lub zog yog qhov rhiab heev rau qhov pores. Tsis tas li ntawd, cov pores yog cov cheeb tsam kev ntxhov siab nrog lub peev xwm tsis muaj zog. Thaum muaj kev ntxhov siab, cov pores nthuav dav rau cov kab nrib pleb ntev thiab raug rhuav tshem. Txawm hais tias ob lub laminates muaj qhov porosity tib yam (siv cov txheej txheem prepreg sib txawv thiab cov txheej txheem tsim khoom thaum tib lub voj voog kho), lawv muaj cov cwj pwm sib txawv kiag li. Cov txiaj ntsig tshwj xeeb rau kev txo qis ntawm cov khoom siv kho tshuab nrog qhov nce ntawm porosity yog qhov sib txawv, uas qhia tau hais tias qhov cuam tshuam ntawm porosity ntawm cov khoom siv tshuab yog qhov tsis sib xws thiab muaj qhov tsis zoo rov ua dua. Kev cuam tshuam ntawm qhov pores ntawm cov khoom siv kho tshuab ntawm cov laminates sib xyaw yog qhov nyuaj heev vim suav nrog ntau qhov sib txawv. lus nug. Cov yam ntxwv no muaj xws li: cov duab, qhov loj me, thiab qhov chaw ntawm qhov pores; mechanical zog ntawm fibers, matrix, thiab interfaces; static los yog dynamic loads.
Tsheb kauj vab carbon fiber rims yog inorganic polymer fibers nrog cov ntsiab lus carbon ntau tshaj 90%. Cov uas muaj cov ntsiab lus carbon ntau dua 99% yog hu ua graphite fibers. Lub microstructure ntawm carbon fiber rims zoo ib yam li dag graphite, uas yog ib tug turbostratic graphite qauv.