1 Mawu Oyamba
Mpweya wa carbon fiber reinforced epoxy composite (CFRP) ili ndi maubwino ambiri monga kusachulukira kochepa, mphamvu zenizeni, kuuma kwapadera, kukana kutopa, kukana dzimbiri komanso makina abwino. Amagwiritsidwa ntchito kwambiri muzamlengalenga ndi zinthu zina zowononga zachilengedwe, kutentha konyowa komanso kukhudzidwa. Chikoka cha zinthu zachilengedwe pa zinthu zakuthupi chikuchulukirachulukira. M'zaka zaposachedwa, akatswiri akunyumba ndi akunja achita kafukufuku wambiri pazachilengedwe zotentha ndi chinyezi pamagulu a CFRP [1] komanso momwe zimakhudzira zophatikiza za CFRP. Kafukufukuyu adapeza kuti chikoka cha chilengedwe chotentha ndi chonyowa pamagulu a CFRP chimaphatikizapo pulasitiki ya masanjidwewo [2, kusweka [31 ndi kufowoketsedwa kwa mawonekedwe amtundu wa fiber-matrix [2'3'5], kupindika kophatikizana kwa CFRP ndi nthawi yowonjezereka yochitira kutentha konyowa). Woldesenbet et al. [8,9] adaphunzira momwe zimagwirira ntchito zamagulu ophatikizika pazovuta kwambiri pambuyo pa chithandizo cha kutentha kwachinyontho, ndipo adapeza kuti chilengedwe chotentha ndi chonyowa chinawongolera mphamvu yamaguluwo. Zikuwululidwa kuti kuyamwa kwa chinyezi kwa zinthu zophatikizika kumatha kusintha magwiridwe antchito azinthu pazinthu zina, zomwe ndizosiyana kwambiri ndi zotsatira zoyeserera pansi pazikhalidwe zofananira. Ntchito yayikulu yaposachedwa yofufuza ndi momwe kutentha kwachinyontho (kuphatikiza kumiza m'madzi) pamayendedwe otsika amphamvu amtundu wa fiber reinforced resin matrix composites. Pan Wenge et al [10] adaphunzira za kuponderezedwa kwa magalasi awiri opangidwa ndi fiberglass / epoxy composite laminates pambuyo pa kutsika kwachangu pa kutentha kwa chipinda komanso pansi pa kutentha ndi chinyezi (65 °C kumizidwa m'madzi). 4. Laminate pansi pa malo otentha ndi amvula amapezeka pambuyo pa kugwedezeka kwachangu. Ntchito ya psinjika imachepetsedwa kwambiri. Karasek et al. [1] adaphunzira zotsatira za chinyezi ndi kutentha pa zotsatira za ma graphite / epoxy composites, ndipo adazipeza m'malo otentha komanso kutentha kwa chipinda. Chinyezi sichimakhudza mphamvu zoyamba ndi kuyamwa kwamphamvu kwa zowonongekazo. Yucheng zhong et al [12,13] adayesa kutsika kwamphamvu pamagetsi ophatikizika pambuyo pa chithandizo cha kutentha kwamadzi. Zimaganiziridwa kuti malo otentha ndi amvula amachepetsa kwambiri kuwonongeka kwa laminate. Kupititsa patsogolo kukana kwa laminate. Krystyna et al. [14] adaphunzira kutsika kothamanga kwa magalasi a aramid-glass fiber / epoxy composite pambuyo pa kutentha kwamadzi (70 °C kumizidwa m'madzi), ndipo adapeza malo owonongeka ang'onoang'ono pambuyo pa chithandizo cha kutentha kwachinyontho. Izi zimabweretsa kuwonongeka kwa delamination mkati mwachitsanzo, chomwe chimatenga mphamvu zambiri panthawi yamphamvu ndikulepheretsa mapangidwe a delamination. Zitha kuwoneka kuchokera pamwambapa kuti chikoka cha chilengedwe cha kutentha kwachinyontho pa kuwonongeka kwa zinthu zophatikizika kumakhala ndi kulimbikitsa komanso kufooketsa. Choncho, kufufuza kwina ndi kutsimikizira ndikofunikira. Pankhani yakukhudzidwa, Mei Zhiyuan et al [15] adapereka malingaliro ndikukhazikitsa magawo awiri (kumeta ubweya wa ubweya ndi kulowa kosalekeza) kusanthula kwamphamvu kwachitsanzo cha ma laminate opangidwa ndi fiber-reinforced composite pansi pamphamvu kwambiri. Guiping Zhao et al. [16] inachititsa mitundu itatu ya liwiro losiyana (zocheperako, zofanana ndi zazikulu kuposa liwiro la malire a ballistic) pa zotsatira za ntchito ndi kuwonongeka kwa chitsanzo pambuyo pa mitundu itatu ya laminates, koma sizinaphatikizepo kukhudzidwa kwa chilengedwe cha kutentha kwachinyezi pa zowonongeka zowonongeka. . Kutengera zolemba zomwe tafotokozazi, kafukufuku wokhudzana ndi momwe chilengedwe chonyowa komanso chotentha chimakhudzira ma fiber opangidwa ndi fiber reinforced laminates sichiyenera kufufuzidwanso. Papepalali, mawonekedwe a kuwonongeka kwa kutentha konyowa kwa carbon fiber / epoxy composite laminates pansi pa 70 °C madzi osambira m'madzi adaphunzira. Zotsatira za chilengedwe chotentha ndi chonyowa pazomwe zimalephera kulephera kwa kompositi zidawunikidwa poyerekeza ndi zitsanzo za kutentha kwachipinda chowuma. Pakuyesa, ma laminate a CFRP adakhudzidwa ndi nyali za CFRP pa 45 m/s, 68 m/s ndi 86 m/s. Kuthamanga kwake kusanachitike komanso pambuyo pake kunayesedwa. Chikoka cha malo otentha ndi chinyezi pa mphamvu mayamwidwe laminates anaunika. Akupanga c-scan adagwiritsidwa ntchito kuti azindikire kuwonongeka kwa mkati mwa laminate, ndipo chikoka cha mphamvu yothamanga pa malo ophwanyika chinafufuzidwa. Makina owonera ma electron maikulosikopu ndi makina ozama kwambiri amitundu itatu adagwiritsidwa ntchito kuyang'ana mawonekedwe a mesoscopic a kuwonongeka kwachitsanzo, ndipo kuwonongeka kwa chitsanzocho kudawunikidwa ndi kutentha kwachinyontho. Zotsatira za mawonekedwe.
2 Zida zoyesera ndi njira
2. 1 Zinthu ndi kukonzekera
Mpweya wa carbon CHIKWANGWANI epoxy utomoni (T300/EMl 12) gulu zinthu, kumizidwa chisanadze operekedwa ndi Jiangsu Hengshen Co., Ltd., single-wosanjikiza chisanadze kumizidwa makulidwe a 0. 137 mm ndi CHIKWANGWANI voliyumu kagawo ka 66%. Gulu la laminate limayikidwa pansi pa wosanjikiza. kukula 115mm x 115mln. Njira yopangira tanki yotentha yotentha imagwiritsidwa ntchito. Ndondomeko yochiritsira yokonzedwa ndi ndondomekoyi ikuwonetsedwa mu Chithunzi 1. Choyamba kwezani nyumba kuchokera kutentha kufika ku 80 oC pa kutentha kwa 1 mpaka 3 oC / min, kenaka khalani otentha kwa mphindi 30, kutentha kwa 130 oC pa kutentha kwa l13 oC / min, kutentha kwa 120 min, kuchepetsa mpaka 60.0C pafupipafupi kuzirala mlingo, ndiyeno kuchotsa mavuto ndi kumasula, ndi kumasula.
2. 2 Kunyowa kutentha mankhwala
Pambuyo pokonzekera chitsanzocho, chitsanzocho chinali chonyowa-kutentha molingana ndi ndondomeko ya HB 7401-96.171 "Resin-based composite composite layer yonyowa yotentha kutentha kuyamwa kwa chinyezi njira yoyesera". Choyamba, chitsanzocho chimayikidwa m'chipinda choyanika cha thermostatic pa 70 ° C kuti chiume. Kulemera nthawi zonse pogwiritsa ntchito miyeso mpaka kutayika kwa khalidwe la chitsanzo kumakhala kokhazikika pa zosaposa 0. 02%, mtengo wolembedwa panthawiyi ndi Engineering Dry Mass G. Pambuyo poyanika, chitsanzocho chimayikidwa mu 70 ° C madzi kuti athetse kutentha kwachinyontho. Malingana ndi ndondomeko ya HB 7401. Njira yotchulidwa mu 96 "imayesa khalidwe la chitsanzo tsiku lililonse, lolembedwa ngati Gi, ndipo limalemba kusintha kwa kuyamwa kwa chinyezi Mi. Kuwonetsa chinyezi kwa chitsanzo cha CFRP laminate ndi:
Njirayi ndi yatsatanetsatane: Mi ndiye mayamwidwe achinyezi a chitsanzocho, Gi ndiye mtundu wake pambuyo poyamwa chinyontho, g, go ndi mtundu wouma waukadaulo wa chitsanzocho.
2. 3 Zoyeserera Zokhuza
Kuyesera kothamanga kwambiri pa CFRP laminate kunachitika pa cannon yamlengalenga yothamanga kwambiri yokhala ndi mainchesi 15 mm. Chipangizo choyezera kuthamanga kwambiri (onani Chithunzi 2) chimaphatikizapo mfuti yamlengalenga yothamanga kwambiri, chipangizo choyezera liwiro la laser chisanachitike kapena pambuyo pa kugunda, thupi la zipolopolo, makina oyika zitsanzo (kona pamwamba kumanja kwa Chithunzi 2), ndi chipangizo chobwezeretsa chitetezo cha thupi. Thupi la chipolopolo ndi chipolopolo chamutu wa cone-cylindrical (Chithunzi 2), ndipo kuchuluka kwa chipolopolo ndi 24. 32 g ndi m'mimba mwake 14. 32 mm; Liwiro lamphamvu ndi 45 m/s (mphamvu ya 46 J), 68 m/s (mphamvu yamphamvu 70 J), 86 m/s (mphamvu yamphamvu 90 J).
2. 4 Kuzindikira kuwonongeka kwa zitsanzo
Pambuyo kukhudzidwa ndi zotsatira, mpweya CHIKWANGWANI mtundu epoxy gulu composite laminate wosanjikiza edgout mbale ntchito kudziwa kuwonongeka mkati mwa mbale CFRP laminate, ndi kuwonetsera m'dera kuwonongeka m'dera amayezedwa ndi chithunzi kusanthula mapulogalamu UTwim, ndi mbali mwatsatanetsatane za chiwonongeko cross-Sectional amawonedwa ndi kupanga sikani ma elekitironi maikulosikopu ndi ultra-3D dongosolo ultra-de.
3 Zotsatira ndi zokambirana
3. 1 Zitsanzo za mayamwidwe a chinyezi
Chiwerengero cha 37. 7 d, chiŵerengero cha kuyamwa kwa chinyezi chochuluka ndi 1. 780%, ndi kufalikira kwa 6. 183x10. 7 nl2/s. Mphepete mwa chinyontho cha chitsanzo cha CFRP laminate chikuwonetsedwa mu Chithunzi 3. Monga momwe tikuonera pa Chithunzi 3, kukula koyambirira kwa kuyamwa kwa chinyezi kwa chitsanzocho ndi mzere, pambuyo pa siteji ya mzere, kukula kwa kuyamwa kwa chinyezi kumayamba kuchepa, kufika pamtunda wokhazikika pambuyo pa nthawi ya 23 sabration, ndikufika pa nthawi ya chinyezi. Choncho, kuyamwa kwa chinyezi kwa chitsanzocho kumagwirizana ndi njira ziwiri zoyamwitsa chinyezi: gawo loyamba la kuyamwa kwa chinyezi ndi chifukwa cha mgwirizano wa kutentha ndi chinyezi, chinyezi kupyolera muzinthu zomwezo zimakhala ndi pores, mabowo, ming'alu ndi zolakwika zina zomwe zimafalikira mkati mwa zinthu; Kufalikira kwa madzi kumakhala pang'onopang'ono ndipo pang'onopang'ono kumafika pakuchulukira panthawiyi.
3. Mawonekedwe a chiwonongeko cha 2-wosanjikiza bolodi laminate
Impact liwiro la 86 m/s pamene chitsanzo kutsogolo, kumbuyo kwa zikuoneka chiwonongeko mbiri mapu, ndi youma chipinda kutentha chitsanzo, chonyowa otentha machulukitsidwe chitsanzo kutsogolo chiwonongeko mawonekedwe kwambiri ngati, zitsanzo ziwiri mu zimakhudza, chifukwa cha ming'alu maziko, chiwonongeko chake pamodzi ndi wosanjikiza woyamba wa CHIKWANGWANI ndi kuzembera. Izi zimapangitsa kuti kutsogolo kupangitse mawonekedwe a elliptical kapena rectangular, ndipo kuwonjezera pa kutha kuona mng'alu mu gawo lapansi, ulusiwo ukhoza kuwonedwa kuti ukusweka. Ndi chitsanzo cha kutentha kwa chipinda chowuma, chitsanzo chonyowa chonyowa kumbuyo kwa chiwonongeko cha mawonekedwewo chimatha kuwoneka kuti kumbuyo komwe kumayendera kumakhala ndi chotupa, ndipo kumapereka mng'alu woboola pakati. N'zoonekeratu kuti kuphulika kwa ulusi, kuphulika kwapansi ndi kuphulika kwa interlayer (kusanjikiza) mitundu itatu ya chiwonongeko, gawo lomaliza la ulusi limakwezedwa koma silinasweka, kuyika kokha ndi fiber / m'munsi. Kuphulika kwa ulusi kumakhalanso kosiyana, monga momwe tingawonere poyerekeza ndi kuwonongeka kwa kutsogolo ndi kumbuyo. Kutsogolo kumayambitsa kupasuka kwa ulusi ndi gawo lapansi chifukwa cha kukanikizana ndi kukameta ubweya. Kumbuyo ndi chifukwa anatambasula chifukwa CHIKWANGWANI kusweka ndi wosanjikiza gawo lapansi. Chithunzi 4 ndi liwiro mantha 45 m/s, 68 m/s, 86 m/s pamene chitsanzo kuwonongeka mkati C jambulani. Malo omwe akuwonetsedwa ndi pafupifupi kuzungulira l imvi mzere pakati pa chithunzicho ndi malo owonetserako a zowonongeka. Mzere wakuda pamwamba ndi pansi pa tchati chaching'ono chilichonse chimasonyeza malo omwe amasenda kumbuyo kwa chitsanzo. Malo olembedwa mu mzere woyera mu chithunzi (b) (d) (f) ndi kuwonongeka kwa mkati kwa chitsanzo pamalire. Grafu ikuwonetsa kuti mphamvu yakukhudzidwa imachulukirachulukira pomwe liwiro lamphamvu likuwonjezeka. Chophimba chopangidwa ndi laminated chimatha kuyamwa mphamvu zambiri panthawi yomwe ikukhudzidwa (onani Chithunzi 6 kuti mudziwe zenizeni), zomwe zimapangitsa kuti chiwerengero cha zowonongeka cha laminate chiwonjezeke: poyerekeza chitsanzo cha kutentha kwa chipinda chowuma ndi chithunzi cha chitsanzo cha kunyowa kwa kutentha, zikhoza kuwoneka kuti pali kuwonongeka kwa mkati (mzere woyera) wa chitsanzo chomwe chimapangidwa m'mphepete mwa malire muyeso yonyowa-yotentha kwambiri chifukwa cha kusungunuka kwa madzi. Mapulasitiki a gawo lapansi mu mbale ya laminate ndi kufowoketsa kwa mawonekedwe a fiber-base kumapangitsa kuti malirewo akhale ndi zotsatira zina pa mbale ya laminate panthawi yokhudzidwa. Malingana ndi chiwerengerocho, malo otsekemera kumbuyo (mzere wakuda) wa chitsanzo mu malo owuma sali wosiyana kwambiri ndi kutentha kwa madzi otentha.
3. Zowonongeka zowonongeka za gulu la 3-wosanjikiza
Kuwonongeka kwapang'onopang'ono mapu a mbale ya CFRP yosanjikiza, yotengedwa ndi makina ozama kwambiri a 3D ndi galasi lamagetsi loyang'ana, ndi liwiro la 45 m / s, louma ndi lonyowa komanso lotentha, limasonyeza kuti kuwonongeka kwa chitsanzo m'madera onsewa kumaphatikizapo mitundu itatu ya chiwonongeko: kuthyoka kwa CHIKWANGWANI, kusweka kwapansi ndi kuthyoka kwa interlayer. Koma maziko a zitsanzo ziwirizo amasweka mosiyana. Kuphulika kwa gawo lapansi mu nthaka youma kumasweka pa kugwirizana pakati pa fiber ndi gawo lapansi. Komabe, kusweka kwa gawo lapansi pambuyo pa chithandizo cha kutentha kwanyowa kumatsagana ndi zidutswa za gawo lapansi zomwe zikugwa. Wold-esenbet ndi zipangizo zina m'malo yonyowa ndi yotentha ya magwiridwe ntchito kapangidwe kamangidwe ndi CHIKWANGWANI gawo lapansi mawonekedwe kuwonongeka mwapang'onopang'ono anatsimikiza chonyowa, mu chilengedwe chonyowa otentha, CFRP wosanjikiza mbale mu utomoni m'munsi zinachitikira mayamwidwe enaake madzi, seeping madzi adzachititsa utomoni gawo lapansi kupasuka. Mpweya wa carbon siwoyamwa, ndiye kuti payenera kukhala kuwonjezeka konyowa pakati pa ziwirizi, kusiyana kumeneku kumafooketsa mawonekedwe pakati pa gawo lapansi ndi fiber, kumachepetsa mphamvu ya gawo lapansi. Zikakhudzidwa ndi katundu wokhudzidwa, zidutswa za gawo lapansi zimatsitsidwa mosavuta, zomwe zimapangitsa kusiyana ndi mawonekedwe owuma a kutentha kwa chipinda. Kuchokera pamapangidwe atsatanetsatane a galasi lamagetsi lopangidwa ndi scanned, zikhoza kuwoneka kuti kusweka kwa thupi lonyowa ndi lotentha la post-base ndilo makamaka kusweka kwapang'onopang'ono kwa atolankhani, pamene kuphulika pamaso pa kutentha konyowa kumakhala kovuta kwambiri, ndipo kumeta ubweya wopingasa pakati pa zigawozo kumawonekera kwambiri. Kuchokera ku microscope ya kuwala mu chithunzichi, zikhoza kuwoneka kuti mawonekedwe a chiwonongeko ndi osiyana pazochitika ziwirizi, ndipo malo owuma ndi chiwonongeko cha inter-kudula. Kudula chiwonongeko makamaka, pambuyo chonyowa kutentha kwa mawonekedwe chiwonongeko limodzi ndi kwambiri wosanjikiza chiwonongeko, gawo la wosanjikiza chiwonongeko kukodzedwa. Itha kuwoneka kuchokera ku ngodya ya chiwonongeko limagwirira ndi mphamvu mayamwidwe makhalidwe. Mei Zhiyuan adayika patsogolo magawo awiri a kuwukira kwa projectile: siteji yodula komanso gawo lowukira mosalekeza. The A m'dera chonyowa otentha chitsanzo ndi kukameta ubweya kulowerera siteji chiwonongeko, makamaka chifukwa ndondomeko mmene, ndi wosanjikiza mbale ndi wothinikizidwa ndi kukameta ubweya mapangidwe chiwonongeko mapindikidwe, b dera ndi mosalekeza kuwukira siteji chiwonongeko. Gawoli limachitika makamaka chifukwa cha kuchepa kwa liwiro lolowera thupi la chipolopolo pansi pakuchitapo kanthu kwa gawo lopanikizika la gawo la ulusi, ndipo mphamvuyo imasandulika kukhala mphamvu ya ulusi wotambasula ndi mphamvu ya interlayer fracture (l 51), kotero kuti chiwombankhanga chimathyola el ndi kutuluka kwa fiber yapitayi sikuli molunjika. Muchitsanzo chowuma, chodabwitsa ichi sichidziwikiratu, ndipo kuwonongeka kwa mbale kumakhala koopsa kwambiri, mbale yosanjikiza imakhala ndi dziko losweka. 3. 4 Mayamwidwe mphamvu ndi damagehole kusonyeza dera kusanthula chithunzi 5 chikusonyeza ubale wouma kutentha m'chipinda ndi konyowa kutentha machulukitsidwe wa liwiro Launch ndi kutaya mphamvu kwa thupi, pa chochitika liwiro pafupifupi 45 m/s, youma kutentha chipinda cha chipolopolo onse kubwerera, kotero osasonyezedwa chithunzi. Monga momwe tikuonera pa Chithunzi 7, pamene mayesero ayesedwa pansi pa kusungunuka kwa kutentha kwa madzi, kutayika kwa mphamvu ya chipolopolo kumakhala koopsa, ndipo mphamvu yoyamwa yachitsanzo pambuyo pa chithandizo cha kutentha kwanyowa chikuwonjezeka.
Chithunzi 6 ndi graph chithunzi cha projekiti dera chipolopolo chochitika liwiro ndi CFRP wosanjikiza dzenje kuwonongeka (mzere imvi chizindikiro gawo la Chithunzi 4), chiwerengero chokwanira (4), (5), (6) tingaone: (1) ndi kuwonjezeka kwa liwiro zotsatira, ndi CFRP wosanjikiza kuwonongeka dzenje projekiti m'dera akuwonjezeka mu ; kutentha machulukitsidwe; (3) pamene zotsatira zake liwiro ndi za 45 m/s, kusonyeza m'dera la damagehole wa mbale laminated pambuyo chonyowa kutentha mankhwala ndi lalikulu kwambiri kuposa kusonyeza dera la laminated mbale kuwonongeka dzenje mu chikhalidwe youma kutentha chipinda. Chonyowa matenthedwe machulukitsidwe chitsanzo kuwonongeka l-dzenje ziyerekezo dera chinawonjezeka ndi 85. 1% ndi pa liwiro mantha pafupifupi 68 m/s, ndi laminated mbale mu chonyowa ndi matenthedwe machulukitsidwe boma chinawonjezeka ndi 18. 10%, mayamwidwe mtengo (Chithunzi 5) chinawonjezeka ndi 15. 65%; Pa liwiro zimakhudza pafupifupi 88 m / s, mbale laminated mu yonyowa ndi matenthedwe machulukitsidwe boma unachepetsedwa ndi 9. 25%, mayamwidwe mtengo akadali chinawonjezeka ndi 12. 45%.
Kutengera zotsatira za kafukufuku wa Yucheng Zhong ndi zinthu zina, kuyamwa kwa chinyontho cha zinthu zophatikizika ndi kaboni fiber kumathandizira kuchepetsa zotanuka komanso kukana kwa mbale ya laminate, ndikuphatikiza malo omwe akuwonongeka kwa dzenje la kutentha kwachipinda chowuma ndi chitsanzo cha kunyowa konyowa mu pepala ili (Chithunzi 4 mumzere wa pulojekitiyo ndi liwiro la pulojekitiyo ndi liwiro la pulojekitiyo) CFRP wosanjikiza dzenje kuwonongeka, ndi kuwonongeka wosanjikiza wa CFRP wosanjikiza kujowina bolodi tingayerekezere pamene zotsatira liwiro ndi chimodzimodzi ndi otsika. Malo owonongeka a chitsanzo chonyowa chotentha ndi chachikulu. Ichi ndi chifukwa chonyowa kutentha mankhwala zimapangitsa CFRP wosanjikiza gawo lapansi plasticization, kufooketsa CHIKWANGWANI ndi mawonekedwe gawo lapansi ndi interlayer ntchito, mu zotsatira, chonyowa kutentha machulukitsidwe boma la chitsanzo wosanjikiza kuwonongeka kukula, chiwerengero cha kuwonongeka chinawonjezeka. Kutengera ndi Wu Yixuan ndi zoyeserera zina zimadziwika kuti mphamvu yoyendetsera njira yoyimirira imatengedwa kwambiri ndi gawo lapansi la utomoni, ndiye kuti pulasitiki ya gawo lapansi imapangitsa chithunzithunzi chonyowa komanso chotentha chotengera mphamvu zambiri panthawi yomwe ikukhudzidwa, kumathandizira kukana, ndikuwonjezera malo owonera dzenje lowonongeka; Kuwonongeka kwa CFRP laminate sikunapitirire mokwanira, zotsatira zake zatha, kotero pamene liwiro la zotsatira ndilokwera, chithandizo chonyowa cha kutentha kwa CFRP laminate chiwonongeko sichikhalanso chachikulu, koma chifukwa cha plasticization ya gawo lapansi utomoni, mphamvu mayamwidwe akadali kuchuluka.
4 Mapeto
(1) Ndi kuchuluka kwa liwiro lamphamvu, malo omwe akuyembekezeredwa a dzenje lowonongeka la kaboni CHIKWANGWANI cholimbikitsidwa ndi epoxy resin composite (CFRP) laminate chimawonjezeka, ndipo kukula kwa kuwonongeka kwa dzenje la L mu chitsanzo pa kutentha kwachipinda chowuma ndikokwera kuposa komwe kumatenthedwa ndi kutentha kwanyowa. Large: (2) Pamene mphamvu liwiro ndi 45 m / s, kuwonongeka ziwonetsero m'dera la CFRP laminate mu chonyowa kutentha machulukitsidwe boma chiwonjezeke ndi 85. 11%, pamene mphamvu liwiro ndi 68 m / s, kuwonongeka chionetserocho m'dera la CFRP laminate mu chonyowa kutentha machulukitsidwe boma likuwonjezeka ndi 18% kutentha machulukidwe CFRP kuyerekeza ndi 18% mu chipinda cha laminate kutentha. 10%, kuthamanga kwake ndi 86m / s. Malo owonetsera zowonongeka za cFRP laminate zonyowa ndi 9.9% poyerekeza ndi kutentha kwa chipinda chouma cFRP laminate. 25%; (3) Pambuyo pa cFRP laminate ikukhudzidwa ndi malo otentha ndi amvula, ntchito ya interlayer ya laminate imachepetsedwa, zomwe zimapangitsa kuti dera la delamination likule.
Nthawi yotumiza: Jun-24-2019