Uma kuqhathaniswa nensimbi, izinto eziyinhlanganisela eziqiniswe ngefayibha yengilazi zinento elula kanye nokuminyana engaphansi kwengxenye eyodwa kwezintathu yensimbi.Kodwa-ke, ngokwamandla, lapho ukucindezeleka kufinyelela ku-400MPa, imigoqo yensimbi izobhekana nokucindezeleka kwesivuno, kuyilapho amandla aqinile wezinto ezihlanganisiwe zengilazi zengilazi zingafinyelela ku-1000-2500MPa.Uma kuqhathaniswa nezinto zensimbi zendabuko, izinto ezihlanganisiwe ze-fiber yengilazi zinesakhiwo esihlukile kanye ne-anisotropy esobala, enezindlela zokwehluleka eziyinkimbinkimbi.Ucwaningo lokuhlola kanye nethiyori ngaphansi kwezinhlobo ezahlukene zemithwalo lunganikeza ukuqonda okuphelele kwezakhiwo zabo eziwumshini, ikakhulukazi uma zisetshenziswa emikhakheni efana nemishini yokuvikela kazwelonke kanye ne-aerospace, edinga ucwaningo olunzulu ngezici zabo kanye nezakhiwo zemishini ukuhlangabezana nezidingo zabo endaweni. indawo yokusetshenziswa.
Okulandelayo kwethula izakhiwo zemishini kanye nokuhlaziywa kokulimala kwangemuva kwezinto ezihlanganisiwe zengilazi, okuhlinzeka ngesiqondiso sokusetshenziswa kwalokhu kwaziswa.
(1) Izakhiwo eziqinile nokuhlaziya:
Ucwaningo luye lwabonisa ukuthi izakhiwo zemishini ye-glass fibre eqiniswe yizinto ezihlanganisiwe ze-epoxy resin zibonisa ukuthi amandla aqinile ohlangothini oluhambisanayo lwento makhulu kakhulu kunalawo asendleleni eqondile yefayibha.Ngakho-ke, ekusetshenzisweni okungokoqobo, isiqondiso se-fiber yengilazi kufanele sigcinwe ngokuhambisana ngangokunokwenzeka nesiqondiso se-tensile, sisebenzisa ngokugcwele izici zayo ezinhle kakhulu zokudonsa.Uma kuqhathaniswa nensimbi, amandla e-tensile aphakeme kakhulu, kodwa ukuminyana kuphansi kakhulu kunensimbi.Kuyabonakala ukuthi, Izakhiwo ezibanzi zemishini yezinto ezihlanganisiwe zengilazi ziphakeme kakhulu.
Ucwaningo selukhombisile ukuthi ukukhulisa inani le-fibre yengilazi engezwe ezintweni eziyinhlanganisela ye-thermoplastic kancane kancane kukhulisa amandla okudonsa ezinto eziyinhlanganisela.Isizathu esiyinhloko ukuthi njengoba okuqukethwe kwe-fiber yengilazi kwanda, imicu yengilazi eyengeziwe entweni eyinhlanganisela ingaphansi kwamandla angaphandle.Ngesikhathi esifanayo, ngenxa yokwanda kwenani lemicu yengilazi, i-resin matrix phakathi kwemicu yengilazi iba mncane, okusiza kakhulu ekwakhiweni kwamafreyimu aqinisiwe we-glass fibre.Ngakho-ke, Ukwanda kokuqukethwe kwe-fiber yengilazi kubangela ukucindezeleka okwengeziwe ukuthi kudluliselwe kusuka ku-resin kuya ku-fiber yengilazi ezintweni ezihlanganisiwe ngaphansi kwemithwalo yangaphandle, ukuthuthukisa ngokuphumelelayo izakhiwo zabo eziqinile.
Ucwaningo mayelana nokuhlolwa okuqinile kwengilazi ye-fiber unsaturated polyester composite materials lubonise ukuthi imodi yokwehluleka kwe-glass fiber eqiniswe izinto eziyinhlanganisela ukwehluleka kwenhlanganisela yamafayibha kanye ne-resin matrix ngokuskena i-electron microscopy yesigaba esiqinile.Indawo ephukile ikhombisa ukuthi inqwaba yemicu yengilazi ikhishwa ku-resin matrix engxenyeni eqinile, futhi ingaphezulu lemicu yengilazi ekhishwe ku-matrix ye-resin ibushelelezi futhi ihlanzekile, nezingcezu zenhlaka ezimbalwa kakhulu ezinamathela phezulu. wemicu yengilazi, Ukusebenza kuwukuphuka okuphukayo.Ngokuthuthukisa ukuxhumana phakathi kwemicu yengilazi neresin, ikhono lokushumeka lalokhu okubili liyathuthukiswa.Engxenyeni eqinile, iningi lezingcezu ze-matrix resin ezinokubopha okwengeziwe kwemicu yengilazi zingabonakala.Okunye ukubhekwa kokukhulisa kubonisa ukuthi inani elikhulu lamabhondi eresin ye-matrix ebusweni bemicu yengilazi ekhishiwe futhi iveza ilungiselelo elifana nekama.Indawo ephukile ikhombisa ukuphuka kwe-ductile, okungafinyelela izici ezingcono zemishini.
(2) Ukugoba ukusebenza nokuhlaziya:
Ukuhlolwa kokukhathala okugoba ngamaphuzu amathathu kwenziwa kumapuleti angaqondile kanye nemizimba ekhipha inhlaka ye-glass fibre eqiniswe yi-epoxy resin composite materials.Imiphumela yabonisa ukuthi ukuqina kokugoba kwalaba ababili kwaqhubeka nokuncipha ngokunyuka kwezikhathi zokukhathala.Kodwa-ke, ukuqina okugobayo kwamapuleti engilazi aqiniswe yi-unidirectional kwakuphakeme kakhulu kunaleyo yemizimba ephonsayo, futhi izinga lokuncipha lokuqina kokugoba lalihamba kancane.Kube nezikhathi zokukhathala ezengeziwe zokuqhekeka okuvela ngokuhamba kwesikhathi, okubonisa ukuthi i-glass fiber inomphumela othuthukisiwe ekusebenzeni kokugoba kwe-matrix.
Ngokwethulwa kwemicu yengilazi kanye nokwenyuka kancane kancane kwengxenyana yevolumu, amandla okugoba ezinto eziyinhlanganisela nawo anda ngokufanele.Uma ingxenye yevolumu ye-fiber ingu-50%, amandla ayo okugoba aphezulu kakhulu, angu-21.3% ngaphezu kwamandla okuqala.Kodwa-ke, lapho ingxenye yevolumu yefiber ingu-80%, amandla okugoba wezinto eziyinhlanganisela abonisa ukwehla okukhulu, okungaphansi kwamandla esampula ngaphandle kwefayibha.Ngokuvamile kukholelwa ukuthi, Amandla aphansi ezinto ezibonakalayo angase abe ngenxa ye-microcracks yangaphakathi kanye ne-voids evimbela ukudluliswa okuphumelelayo komthwalo nge-matrix kuya emiculweni, futhi ngaphansi kwamandla angaphandle, ama-microcracks akhula ngokushesha ukuze enze amaphutha, ekugcineni abangele umonakalo. ukuhlangana kokuxhumana kwalokhu okuhlanganisiwe kwefayibha yengilazi kuncike ikakhulukazi ekugelezeni kwe-viscous ye-glass fibre matrix emazingeni okushisa aphezulu ukugoqa imicu, futhi imicu yengilazi eyeqile ivimbela kakhulu ukugeleza kwe-viscous kwe-matrix, okubangela izinga elithile lomonakalo ukuqhubeka phakathi izindawo zokusebenzelana.
(3) Ukusebenza kokumelana nokungena:
Ukusetshenziswa kwefayibha yengilazi enamandla amakhulu aqiniswe izinto eziyinhlanganisela ebusweni nangemuva kwezivikelo zempi kunokumelana nokungena okungcono uma kuqhathaniswa nensimbi yengxubevange evamile.Uma kuqhathaniswa nensimbi yengxubevange, izinto eziyinhlanganisela ye-fiber yengilazi ebusweni nangemuva kwezivikelo eziqhumayo zinezicucu ezincane ezisele ngemva kokuqhunyiswa, ngaphandle kwanoma yimaphi amandla okubulala, futhi zingaqeda kancane umphumela wokubulala wesibili wezivikelo eziqhumayo.
Isikhathi sokuthumela: Nov-07-2023
