PTFE chinhu chinobatsira zvakanyanya nekuti ine yakasarudzika musanganiswa wezvivakwa.PTFE ikemikari inert, mamiriro ekunze, yakanakisa magetsi ekudzivirira, yakakwirira tembiricha kuramba, yakaderera coefficient of friction uye isina-adhesive properties.
Mapolymers anowanzo shandiswa mukugadzira uye engineering, zvisinei, yakadhindwa tsvakiridzo inotsanangura mashandiro avo emuchina anoita seasina kumiririrwa achipihwa kukosha kwawo.Yakawanda yedata rinounzwa, zvese zvakawandisa zvinopa ruzivo rwakakwana nezve iyo chaiyo pedigree yepolymer yakaedzwa uye nhoroondo yayo yekugadzirisa.Izvi zvinogoneka nekuti kumisikidza iyo base-line zvinhu hunhu kunowanzo kuoma sekuita iwo chaiwo mechanic bvunzo.Pamusoro pezvo, kuenzanisira kwekombuta kwepolymer mechanical mhinduro ichiri muhucheche.Nzira dzakawanda dzeempirical dzinowanzo shandiswa, asi dzinowanzova dzisina kururama kunze kwenzvimbo yakamanikana yeparameter.Chimwe chikonzero cheizvi, kunze kwekuoma kwemhinduro yepolymer, ndechekuti kazhinji data haiwanikwe kunze kweiyo nhete yekuyedza paramita renji kupikisa nekuwedzera kusimba kweempirical kana phenomenological based constitutive modhi.Pano, tinopa mibairo yekutanga yekuedza kwakasiyana-siyana kwakanangana nekunzwisisa mhinduro yemuchina yepolymer yakanyatso zivikanwa kubva kune ese ari maviri ekuongorora nzvimbo uye gare gare, pamwe nekugadzirwa kweiyo yakasimba yetioretical modhi inokwanisa kuiswa mumakodhi emakomputa. .
Iyo polymer inotsanangurwa muchidzidzo ichi ndeye poly(tetrafluoroethylene) (PTFE).Yakasarudzwa nekuda kwezvikonzero zvakati wandei, kusanganisira kushandiswa kwayo seyakajairwa mainjiniya ezvikamu zvidiki zvepamusoro-soro uye kuwanikwa kwayo kubva kune akati wandei vagadziri.Kunyange zvazvo yakadzidzwa zvakanyanya munguva yakapfuura, yakawana ngwariro shoma mumabhuku akazaruka kwemakore 25 apfuura.Isu takasarudza kudzokorora chinyorwa ichi nekuda kwekuoma kwayo kwechimiro uye kushaikwa kwemechini data.PTFE chinhu chinoshamisa munzira dzakawanda.Inoratidza zvinobatsira zvivakwa pamusoro peyakakura tembiricha yemhando ipi neipi yepolymer;PTFE inoramba iine imwe chiyero che ductility pa 4 K uye mune mamwe mamiriro ezvinhu inoshandiswa mumashandisirwo pa 540 8C .Haisi kunyungudika mune zvese zvinonyungudutsa zvakajairika uye inopesana neanenge ese acidic uye caustic zvinhu.PTFE ine pakati peyepamusoro resistivity yechero chinhu, yakakwira kwazvo dielectric simba uye yakaderera dielectric kurasikirwa.Iyo coefficient yekutsvedza kukweshera pakati pePTFE uye akawanda einjiniya emidziyo yakadzikira zvakanyanya uye kana yakasimwa nemakomisheni ekuderedza kupfeka, kirasi yakakosha muindasitiri yekutakura zvinhu inoumbwa.Yakabatanidzwa kune yakaderera coefficient yekukwesha uye kugadzikana kwekemikari, PTFE inenge isingagoneki kuti zvimwe zvinhu zvitevedzere.Ichi chivakwa chinowanzo shandiswa muindasitiri yekugadzirisa tekinoroji uko kureruka kwekuchenesa kwakakosha.Chimwe chikamu chePTFE chakaidzora kumashure kubva kune yakawedzera maindasitiri nekushandiswa kweinjiniya ndeye yakakwira melt viscosity (1011 P pa380 8C).Izvi zvinodzivirira jekiseni uye kuvhuvhuta kuumba kubva pakugoneka uye chete inodhura sintering uye extrusion yekugadzira maitiro aripo echikamu kugadzirwa.
Iri bepa rinotarisa pane base-line zvinhu hunhu uye inomanikidza mhinduro yepedigreed PTFE zvinhu pamhando dzakasiyana-siyana uye tembiricha.Mapepa emangwana achabata nemhinduro yekusimba uye yekuveura, yakadzama mhedzisiro yepolymer crystallinity, ballistic uye kuvhunduka maitiro uye kuvandudzwa kweiyo inoshanda theoretical constitutive modhi.
Yakanyanya kudiki tsvakiridzo yapfuura pamusoro pekumanikidza zvivakwa zvePTFE zvakaburitswa.Imwe tsvagiridzo pamusoro pezvinokambaira zvivakwa zviripo, asi maererano neiyo engineeringdeformation, mareferensi matanhatu chete ndiwo auya kune vanyori.Muna 1963, Davies akaburitsa bepa pamusoro pekuvandudzwa kweSplit-Hopkinson bar system.Sechikamu chemushumo uyu, imwe kamuri tembiricha yekumanikidza / kuomesa curve yePTFE yakaunzwa paz1700 sK1.Kunyanya kuomeswa kwakaiswa mune ino system kwaingova 3%.Imwezve highstrain rate data papolymer maringe tembiricha yakabudiswa naGrey naWalley.Koo akabudisa dambudziko rekushungurudzika / dambudziko reImperial Chemical Industries PTFE chigadzirwa chinonzi Halon G-80 mu1965.Migumisiro yekushisa pamhinduro ye mechanical yakakurukurwawo muchidimbu.
Nguva yekutumira: Aug-16-2016