Ultra siab molecular hnyav polyethylene (UHMWPE) fibers, tseem hu ua ultra-high modulus polyethylene (UHMPE) fibers los yog txuas ntxiv saw polyethylene fibers (ECPE), yog lub thib peb tiam high-strength siab modulus fibers uas tshwm sim nyob rau hauv thaum ntxov 1990s. Nws cov txheeb ze molecular hnyav li ntawm 1 lab mus rau 6 lab, thiab nws cov duab molecular yog ib txoj kab txuas txuas ntxiv. Nws txoj kev taw qhia yog ze rau 100%, thiab nws lub zog yog qhov siab tshaj plaws ntawm cov fibers niaj hnub no, nrog cov khoom siv zoo. Kev sib piv nrog lwm cov fibers. UHMWPE fibers kuj muaj cov khoom zoo heev xws li tsis kam mus rau ultraviolet hluav taws xob, tshuaj lom neeg corrosion, siab tshwj xeeb lub zog nqus, tsis tshua muaj hluav taws xob tsis tu ncua, hluav taws xob hluav taws xob hluav taws xob siab, kev sib txhuam coefficient tsawg, thiab muaj kev cuam tshuam zoo thiab txiav tsis kam. Yog li ntawd, UHMWPE fiber ntau yog cov khoom siv zoo tshaj plaws rau kev ua cov mos mos mos mos, cov tsho pov thawj pov thawj, lub teeb yuag yuag kaus mom hlau, radar npog, mos mos armor rau cov neeg nqa nyiaj ntsuab, nyoob hoom qav taub armor, nkoj thiab dej hiav txwv mus nkoj cables, lub teeb yuag high-pressure ntim, aerospace structural. Cheebtsam, sib sib zog nqus cua cua thiab yoj resistant tawb, nuv ntses nets, sib tw nkoj, sailboats, caij ski sleds, thiab lwm yam thoob ntiaj teb nyob rau hauv xyoo tas los no.
Lub axial compression kev ua tau zoo ntawm UHMWPE fiber reinforced composite cov ntaub ntawv yog qhov tsawg, thiab txawm tias tom qab kev kho mob, axial compression zog ntawm sK66 / epoxy composite cov ntaub ntawv tsuas yog 54.4 MPa (sK66 yog lub npe lag luam ntawm UHMWPE fiber ntau). Thaum cov qauv raug compressed rau 70% ntawm qhov kawg load, yas deformation pib tshwm sim thiab maj mam nce, ua rau shear tsis ua hauj lwm kom txog rau thaum tus qauv tsis ua hauj lwm, tab sis tsis mus txuas ntxiv. Lub ntsiab mechanism ntawm compression tsis ua hauj lwm ntawm cov ntaub ntawv no yog instability ntawm UHMWPE fibers nyob rau hauv compression thiab lub detachment ntawm lub dabtsi yog khoov interface. Tsis tas li ntawd, kev khoov ntawm UHMWPE fiber reinforced composite cov ntaub ntawv kuj tsawg heev. Piv txwv li, lub siab tshaj plaws dabtsi yog khoov lub zog ntawm kho SK66 / epoxy composite khoom tsuas yog 150MPa, uas yog hais txog 1/7 ntawm lub zog tensile. Thaum lub peev xwm load-bearing ntawm lub compressed ib feem tshaj lub compressive zog ntawm SK66 fibers nyob rau hauv dabtsi yog khoov lub sij hawm, lub fibers yuav tsis ruaj khov, ua rau delamination; Lub tensile ib feem yog delaminated vim detachment ntawm fibers thiab cob. Failure txheej los ntawm txheej, thaum kawg ua rau ductile dabtsi yog khoov tsis ua hauj lwm. Bending delamination yog lub ntsiab khoov tsis ua haujlwm ntawm cov khoom siv no. Xian Xingjuan thiab lwm tus tau kawm ntxiv txog qhov tawg toughness thiab tawg propagation ntawm UHMWPE fiber reinforced composite cov ntaub ntawv,. Lawv tau txais ib txoj kev khoov peb-txheej txheem, nrog rau ib qho kev taw qhia ib leeg ntawm tus qauv, thiab qhov sib piv ntawm qhov ntev (a) rau tus qauv dav (w) yog 0.3. Cov deformation thiab propagation ntawm pob txha tawg tau pom thiab yees duab siv lub koob yees duab telephoto. Cov kev sim tau pom tias LDPE matrix muaj kev puas tsuaj ntau dua li epoxy matrix, thiab yog li ntawd tuaj yeem nqus tau ntau zog. Thaum lub bending load ntawm LDPE matrix ncav cuag tus nqi tseem ceeb, lub taub hau tawg yuav passive, thiab cov fibers detach thiab tig dawb nyob ze ntawm lub shear cheeb tsam ntawm lub tawg. Yog tias siv unidirectional UHMWPE fiber reinforced resin, cov kab nrib pleb yuav tshwm rau ntawm qhov kev taw qhia ntawm qhov thais hauv cov qauv; Los ntawm kev siv I-shaped UHMWPE fiber ntau orthogonal woven npuag los txhim kho cov resin, passivation yuav tshwm sim nyob rau sab saum toj ntawm lub notch hauv cov qauv, thiab cov yas deformation tuaj yeem ua rau micro tawg, ua rau cov ntsiab lus kev ntxhov siab thiab ua rau cov yas tsis ua haujlwm.