Impembelelo yeMiba yokusiNgqongileyo ekuZinziseni kweFayibha eQiniswa nePlastiki yoQiniso lweeBar (FRP)

IFayibha Eyongeziweyo yePlastiki yokuQinisa(I-FRP Reinforcement) ithatha indawo ngokuthe ngcembe ukuqiniswa kwentsimbi yemveli kubunjineli boluntu ngenxa yobunzima bayo, amandla aphezulu kunye nezakhiwo ezichasene ne-corrosion. Nangona kunjalo, ukuqina kwayo kuchatshazelwa zizinto ezahlukeneyo zokusingqongileyo, kwaye ezi zinto zilandelayo zibalulekileyo kunye neendlela zokuthintela kufuneka zithathelwe ingqalelo:

1. Ukufuma kunye nokusingqongileyo kwamanzi

Indlela yempembelelo:

Ubumanzi bungena kwi-substrate ebangela ukudumba kunye nokunciphisa i-fiber-substrate interface bond.

I-Hydrolysis ye-glass fibers (GFRP) inokuthi yenzeke ngokulahlekelwa okukhulu kwamandla; Iifiber zekhabhoni (CFRP) azichaphazeleki kancinci.

Ukuhamba ngebhayisikile okumanzi kunye nokomileyo kukhawulezisa ukwandiswa kwe-microcrack, kubangela i-delamination kunye nokudibanisa.

Amanyathelo okhuseleko:

Khetha iireyini ezisezantsi zehygroscopicity (umz. ivinyl ester); ukugquma komhlaba okanye unyango lokuthintela amanzi.

Khetha iCFRP kwindawo efumileyo yexesha elide.

2. Ubushushu kunye ne-Thermal Cycling

Iziphumo zobushushu obuphezulu:

I-resin matrix iyathamba (ngaphezu kweqondo lobushushu beglasi), okukhokelela ekunciphiseni kokuqina kunye nokomelela.

Ubushushu obuphezulu bunyusa i-hydrolysis kunye ne-oxidation reaction (umzIfayibha yeAramidI-AFRP isesichengeni sokuthotywa kwe-thermal).

Iziphumo zobushushu obuphantsi:

I-matrix embrittlement, ixhomekeke kwi-micro-cracking.

Ibhayisekile eshushu:

Umahluko kwi-coefficient yokwandiswa kwe-thermal phakathi kwefayibha kunye ne-matrix kukhokelela ekuqokeleleni koxinzelelo lwe-interfacial kunye ne-triggers debonding.

Amanyathelo okhuseleko:

Ukukhethwa kweereyini ezinokumelana nobushushu obuphezulu (umz. i-bismaleimide); ukulungiswa kwefiber/substrate thermal match.

3. Imitha yemitha ye-Ultraviolet (UV).

Indlela yempembelelo:

I-UV ibangela ukusabela kwe-photo-oxidation ye-resin, ekhokelela ekubeni i-chalking, i-embrittlement kunye nokwanda kokuqhekeka kwe-micro.

Ukukhawuleza ukungena komswakama kunye neekhemikhali, kubangela ukuthotywa kwe-synergistic.

Amanyathelo okhuseleko:

Yongeza i-UV absorbers (umz. i-titanium dioxide); gubungela umphezulu ngocweyo olukhuselayo (umzekelo, i-polyurethane coating).

Zihlole rhoqoAmacandelo e-FRPkwiindawo ezivulekileyo.

4. Ukonakala kweekhemikhali

Indawo eneAcidic:

Ukukhukuliseka kwesakhiwo se-silicate kwimicu yeglasi (i-GFRP ebucayi), okubangela ukuphuka kwefiber.

Ubume bealkaline (umz. ulwelo lwepore ekhonkrithi):

Iphazamisa inethiwekhi ye-siloxane ye-GFRP fibers; i-resin matrix inokuthi i-saponify.

Ifayibha yeCarbon (CFRP) inoxhathiso olubalaseleyo lwealkali kwaye ifanelekile kwizakhiwo zekhonkrithi.

Iindawo zokutshiza ityuwa:

Ukungena kwe-chloride ion kukhawulezisa ukubola okuphakathi kobuso kunye nokuhambelana nokufuma ukuze kuqhubele phambili ukuhla komgangatho wokusebenza.

Amanyathelo okhuseleko:

Ukukhethwa kweentsinga ezichasene neekhemikhali (umz., CFRP); ukongezwa kwezizalisi ezinganyangekiyo kwi-matrix.

5. Imijikelo yokunyibilika komkhenkce

Indlela yempembelelo:

Ubumanzi obungena kwi-microcracks buba ngumkhenkce kwaye buyanda, bukhulise umonakalo; ukukhenkceza okuphindaphindiweyo kunye nokunyibilika kukhokelela ekuqhekekeni kwe-matrix.

Amanyathelo okhuseleko:

Ukulawula ukufunxa kwamanzi; sebenzisa i-resin matrix eguquguqukayo ukunciphisa umonakalo onqabileyo.

6. Ukulayisha ixesha elide kunye nokukhasa

Iziphumo zomthwalo omileyo:

I-Creep of the resin matrix ikhokelela kuxinzelelo kwakhona kwaye iifiber ziphantsi kwemithwalo ephezulu, enokuthi ibangele ukwaphuka.

I-AFRP irhubuluza kakhulu, iCFRP ineyona ndlela ibalaseleyo yokuxhathisa.

Iyalayisha ngamandla:

Ukulayisha ukukhathala kukhawuleza ukwandiswa kwe-microcrack kwaye kunciphisa ubomi bokukhathala.

Amanyathelo okhuseleko:

Vumela ukhuseleko oluphezulu kuyilo; khetha i-CFRP okanye i-modulus fibers ephezulu.

7. Ukudityaniswa kokusingqongileyo okudityanisiweyo

Iimeko zehlabathi zokwenyani (umzekelo, imo engqongileyo yaselwandle):

Ukufuma, isitshizi setyuwa, ukuguquguquka kwamaqondo obushushu kunye nemithwalo yoomatshini isebenza ngokubambisana ukwenza bufutshane kakhulu ubomi.

Iqhinga lempendulo:

Uvavanyo lokuguga olukhawulezileyo lwezinto ezininzi; uyilo logcino lwezaphulelo zokusingqongileyo.

Isishwankathelo kunye neeNgcebiso

Ukukhethwa kweMathiriyeli: Uhlobo lwefayibha ekhethwayo ngokwemeko-bume (umzekelo, i-CFRP yokumelana neekhemikhali ezilungileyo, i-GFRP ibiza ixabiso eliphantsi kodwa ifuna ukhuseleko).

Uyilo lokukhusela: ukugubungela umphezulu, unyango lokutywinwa, ukulungiswa kwe-resin ephuculweyo.

Ukubeka iliso kunye nokugcinwa: ukufunyanwa rhoqo kwee-micro-cracks kunye nokunciphisa ukusebenza, ukulungiswa ngexesha elifanelekileyo.

Ukuqina kweFRP ukuqinisaidinga ukuqinisekiswa ngokuhlanganiswa kokulungiswa kwezinto, uyilo lwesakhiwo kunye novavanyo lokuziqhelanisa nokusingqongileyo, ngakumbi kwiimeko ezinzima apho ukusebenza kwexesha elide kufuneka kuqinisekiswe ngononophelo.