Kana ichienzaniswa nesimbi, girazi fiber reinforced composite zvinhu zvine zvinhu zvakareruka uye density isingasviki chikamu chimwe muzvitatu chesimbi.Nekudaro, maererano nekusimba, kana kushushikana kwasvika 400MPa, masimbi esimbi achaona kushushikana kwegoho, ukuwo simba rekusimba regirazi fiber composite zvinhu zvinogona kusvika 1000-2500MPa.Kana ichienzaniswa neyechinyakare simbi zvinhu, girazi faibha inoumbwa zvinhu zvine heterogeneous chimiro uye pachena anisotropy, ine zvakanyanya kuoma maitiro ekutadza.Tsvagiridzo yekuyedza uye yedzidziso pasi pemhando dzakasiyana dzemitoro inogona kupa kunzwisiswa kwakadzama kwemaitiro avo emagetsi, kunyanya kana akaiswa muminda senge midziyo yekudzivirira yenyika uye aerospace, izvo zvinoda tsvakiridzo yakadzama pamusoro pehunhu hwavo uye michina zvivakwa kuti zvizadzise zvavanoda mu kushandiswa nharaunda.
Izvi zvinotevera zvinounza ma mechanical properties uye post damage analysis ye glass fiber composite zvinhu, zvichipa hutungamiri hwekushandiswa kwechinyorwa ichi.
(1) Tensile zvivakwa uye ongororo:
Tsvagiridzo yakaratidza kuti michina yegirazi faibha yakasimbisa epoxy resin inoumbwa zvinhu inoratidza kuti kusimba kwesimba munzira inofananidzwa yechinhu chikuru kupfuura icho chiri munzira yakatwasuka yefiber.Naizvozvo, mukushandiswa kunoshanda, kutungamira kwegirazi fiber kunofanirwa kuchengetwa sekuenderana sezvinobvira neinotemesa kutungamira, ichishandisa zvizere yayo yakanakisa tensile zvimiro.Kuenzaniswa nesimbi, simba rekusimba rakanyanya kukwirira, asi density yakaderera zvakanyanya kupfuura yesimbi.Zvinogona kuoneka kuti, Iwo akazara mechanicha zvimiro zvegirazi fiber composite zvinhu zvakakwirira.
Tsvagiridzo yakaratidza kuti kuwedzera huwandu hwegirazi fiber inowedzerwa kune thermoplastic composite zvinhu zvishoma nezvishoma inowedzera kusimba kwesimba rezvakasanganiswa zvinhu.Chikonzero chikuru ndechekuti sezvo iyo girazi fiber yemukati inowedzera, yakawanda girazi fibers mune inoumbwa zvinhu inoiswa pasi pemasimba ekunze.Panguva imwecheteyo, nekuda kwekuwedzera kwenhamba yegirazi fibers, resin matrix pakati pegirazi fibers inova yakaonda, iyo inonyanya kubatsira pakuvakwa kwegirazi fiber reinforced frames.Naizvozvo, Kuwedzera kwegirazi fiber yemukati kunokonzera kushushikana kwakawanda kuti kufambiswe kubva kune resin kusvika kune girazi fiber mune inoumbwa zvinhu pasi pemitoro yekunze, zvinobudirira kuvandudza kwavo kusimba.
Tsvagiridzo pamusoro pekumisikidza bvunzo dzegirazi fiber unsaturated polyester composite zvinhu zvakaratidza kuti kutadza modhi yegirazi faibha yakasimbiswa inoumbwa zvinhu ndiko kutadza kusanganiswa kwemafiber uye resin matrix kuburikidza nekuongorora ma electron microscopy yechikamu chekusimba.Iyo yakatyoka pamusoro inoratidza kuti nhamba huru yegirazi faibha inodhonzwa kunze kweresin matrix pachikamu chekusimba, uye pamusoro pegirazi fiber inoburitswa kubva muresin matrix inotsvedzerera uye yakachena, ine mashoma mashoma resin zvimedu zvinonamatira pamusoro. yegirazi fibers, Kuita kwacho kwakaputsika brittle.Nekuvandudza iyo yekubatanidza interface pakati pegirazi fibers uye resin, kugona kwekumisikidza kwezviviri kunowedzerwa.Pachikamu chekumisikidza, mazhinji ematrix resin zvimedu zvine kusungirirwa kwakawanda kwegirazi fibers zvinogona kuoneka.Kuwedzera kutarisisa kunoratidza kuti huwandu hukuru hwematrix resin bonds pamusoro peiyo yakabviswa girazi fiber uye inopa muzinga senge kurongeka.Iyo yekutyoka pamusoro inoratidza ductile fracture, iyo inogona kuwana zvirinani mechanic zvivakwa.
(2) Kupeta kuita uye kuongorora:
Matatu ekukotamisa kuneta bvunzo akaitwa pamahwendefa eunidirectional uye miviri yekukanda resin yegirazi fiber yakasimbiswa epoxy resin composite zvinhu.Mhedzisiro yacho yakaratidza kuti kuomarara kwekukotama kwevaviri kwakaramba kuchiderera nekuwedzera kwenguva dzekuneta.Nekudaro, kuomarara kwekukotama kwegirazi fiber yakasimbisa unidirectional mahwendefa aive akakwira zvakanyanya kupfuura ayo emitumbi yekukanda, uye kuderera kwechiyero chekuomarara kwainonoka.Paive nekuwedzera kuneta nguva dzekutsemuka dzichionekwa nekufamba kwenguva, zvichiratidza kuti girazi fiber ine inosimudzira mhedzisiro pakukotama kuita kwematrix.
Nekuunzwa kwegirazi fibers uye zvishoma nezvishoma kuwedzera kwevhoriyamu chikamu, simba rekukotama rezvinhu zvakaumbwa rinowedzerawo zvinoenderana.Kana iyo fiber vhoriyamu chikamu chiri 50%, simba rayo rekukotama ndiro rakakwirira, iro riri 21.3% yakakwirira kupfuura simba rekutanga.Nekudaro, kana iyo fiber vhoriyamu chikamu chiri 80%, simba rekukotama rezvinhu zvinoumbwa rinoratidza kudzikira kwakanyanya, uko kwakadzikira pane kusimba kweiyo sampuli isina fiber.Zvinowanzotendwa kuti, Iyo yakaderera simba rezvinyorwa zvinogona kunge zvakakonzerwa nemukati microcracks uye voids inovharira kufambiswa kunobudirira kwemutoro kuburikidza nematrix kusvika kune fibers, uye pasi pemasimba ekunze, microcracks inokurumidza kuwedzera kuumba kukanganisa, pakupedzisira inokonzera kukanganisa. interface yekubatanidza yeiyi girazi fiber composite zvinhu inonyanya kutsamira pakuyerera kwegirazi fiber matrix pakupisa kwakanyanya kuputira mafirita, uye yakawandisa girazi fiber inotadzisa zvakanyanya kuyerera kwematrix, zvichikonzera imwe dhigirii yekukuvadza kuenderera mberi pakati. iyo interfaces.
(3) Kupinza kuramba kuita:
Iko kushandiswa kwepamusoro-simba regirazi faibha yakasimbiswa inoumbwa zvinhu zvechiso uye kumashure kwemaitiro ezvombo zvine nani kupinda mukati kana zvichienzaniswa neyechinyakare alloy simbi.Kuenzaniswa nesimbi yealloy, girazi faibha inoumba zvinhu zvechiso uye kumashure kweanoputika maitiro ezvombo zvine zvimedu zvidiki zvakasara mushure mekuputika, pasina kugona kuuraya, uye zvinogona kubvisa zvishoma kuuraya kwechipiri mhedzisiro yekuputika kwezvombo zvekuzvidzivirira.
Nguva yekutumira: Nov-07-2023
