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Umphumo we-microstructure kwi-formability of stainless steel sheets yinkxalabo enkulu yeenjineli ze-metalworking sheet. Kwiinsimbi ze-austenitic, ubukho be-deformation martensite (\ ({\ alpha} ^ {^ {\ prime)) \) -martensite) kwi-microstructure ikhokelela ekuqinisweni okubonakalayo kunye nokunciphisa ukubunjwa. Kolu phononongo, sijonge ukuvavanya ukwakheka kweentsimbi ze-AISI 316 ezinamandla ahlukeneyo emartensitic ngeendlela zokulinga kunye nezobukrelekrele bokwenziwa. Kwinqanaba lokuqala, intsimbi ye-AISI 316 enobunzima bokuqala obuyi-2 mm yafakwa i-anneal kwaye ibanda yaqengqeleka yaya kubunzima obahlukeneyo. Emva koko, indawo ye-martensite yoxinzelelo olunxulumeneyo yalinganiswa ngovavanyo lwe-metallographic. Ukuqulunqwa kwamaphepha adibeneyo kunqunywe ngokusebenzisa uvavanyo lwe-hemisphere burst ukufumana umzobo we-strain limit diagram (FLD). Idatha efunyenwe ngenxa yeemvavanyo isetyenziselwa ngakumbi ukuqeqesha kunye nokuvavanya inkqubo ye-neuro-fuzzy interference (ANFIS) eyenziweyo. Emva koqeqesho lwe-ANFIS, iintlobo eziphambili ezixelwe kwangaphambili yi-neural network yafaniswa neseti entsha yeziphumo zovavanyo. Iziphumo zibonisa ukuba ukuqengqeleka okubandayo kunempembelelo embi ekubunjweni kolu hlobo lwensimbi engenasici, kodwa amandla ephepha aphuculwe kakhulu. Ukongeza, i-ANFIS ibonisa iziphumo ezanelisayo xa kuthelekiswa nemilinganiselo yovavanyo.
Ukukwazi ukwenza iphepha lesinyithi, nangona umxholo wamanqaku enzululwazi amashumi eminyaka, uhlala uyindawo enomdla yophando kwi-metallurgy. Izixhobo ezitsha zobugcisa kunye neemodeli zokubala zenza kube lula ukufumana izinto ezinokubakho ezichaphazela ukwakheka. Okona kubaluleke kakhulu, ukubaluleka kwe-microstructure yomda wemilo kuye kwavezwa kwiminyaka yamuva kusetyenziswa i-Crystal Plasticity Finite Element Method (CPFEM). Kwelinye icala, ubukho bokuskena i-electron microscopy (SEM) kunye ne-electron backscatter diffraction (EBSD) inceda abaphandi bajonge umsebenzi we-microstructural we-crystal structures ngexesha lokuguqulwa. Ukuqonda impembelelo yezigaba ezahlukeneyo kwisinyithi, ubungakanani beenkozo kunye nokuqhelaniswa, kunye neziphene ze-microscopic kwinqanaba lokuziinkozo kubalulekile ukuqikelela ukwakheka.
Ukumisela ukwakheka ngokwayo kuyinkqubo enzima, njengoko ukubunjwa kuye kwaboniswa ukuba kuxhomekeke kakhulu kwiindlela ze-1, 2, 3. Ngoko ke, iingcamango eziqhelekileyo zobunzima bokugqibela bokubumba azithembeki phantsi kweemeko zokulayisha ezingenakulinganiswa. Kwelinye icala, uninzi lweendlela zomthwalo kwizicelo zemizi-mveliso zihlelwa njengomthwalo ongalinganiyo. Kule nkalo, iindlela zendabuko ze-hemispherical kunye novavanyo lweMarciniak-Kuchinsky (MK)4,5,6 kufuneka zisetyenziswe ngokuqaphela. Kwiminyaka yakutshanje, enye ingcamango, i-Fracture Limit Diagram (FFLD), iye yatsala ingqalelo yeenjineli ezininzi zokubumba. Kule ngcamango, imodeli yomonakalo isetyenziselwa ukuqikelela ukwakheka kwephepha. Kule nkalo, ukuzimela kwendlela kubandakanywa ekuqaleni kuhlalutyo kwaye iziphumo zivumelana kakuhle kunye neziphumo zovavanyo ezingenakulinganiswa7,8,9. Ukuqulunqwa kweshiti lesinyithi kuxhomekeke kwiiparamitha ezininzi kunye nembali yokucubungula iphepha, kunye ne-microstructure kunye nesigaba se-metal10,11,12,13,14,15.
Ukuxhomekeka kobungakanani kuyingxaki xa kuqwalaselwa iimpawu ezincinci zesinyithi. Kuye kwaboniswa ukuba, kwiindawo ezincinci zokuguqulwa, ukuxhomekeka kweempawu zokungcangcazela kunye ne-buckling kuxhomekeke kakhulu kumlinganiselo wobude bezinto eziphathekayo16,17,18,19,20,21,22,23,24,25,26,27,27; 28,29,30. Isiphumo sobungakanani beenkozo ekubumbeni kudala sibonwa kushishino. U-Yamaguchi kunye no-Mellor [31] bafunde isiphumo sobungakanani beenkozo kunye nobukhulu kwiipropati ezithintekayo zamaphepha esinyithi usebenzisa uhlalutyo lwethiyori. Besebenzisa imodeli ye-Marciniac, baxela ukuba phantsi komthwalo we-biaxial tensile, ukuncipha komlinganiselo wobunzima bobukhulu obuziinkozo kukhokelela ekwehleni kweempawu zokuqina kwephepha. Iziphumo zovavanyo nguWilson et al. I-32 iqinisekisile ukuba ukunciphisa ubukhulu ukuya kumyinge we-graydiameter (t / d) kubangele ukuhla kwe-biaxial extensibility ye-metal sheets yobunzima obuthathu obuhlukeneyo. Baye bagqiba kwelokuba kumaxabiso e-t/d angaphantsi kwama-20, i-deformation inhomogeneity ebonakalayo kunye nentamo ichaphazeleka kakhulu ziinkozo zomntu ngamnye kubunzima bephepha. I-Ulvan kunye ne-Koursaris33 bafunde umphumo wobungakanani bengqolowa kwi-machinability jikelele ye-304 kunye ne-316 i-austenitic stainless steels. Baxela ukuba ukubunjwa kwezi zinyithi akuchaphazeli ubungakanani beenkozo, kodwa utshintsho oluncinci kwiipropathi zokuqina luyabonakala. Kukunyuka kobukhulu obuziinkozo okukhokelela ekuncipheni kweempawu zamandla ezi ntsimbi. Impembelelo yoxinaniso lwe-dislocation kwi-flow stress ye-nickel metals ibonisa ukuba ukuxinana kwe-dislocation kuqinisekisa ukunyanzeliswa kokuhamba kwesinyithi, kungakhathaliseki ukuba bubungakanani bengqolowa34. Ukusebenzisana okuziinkozo kunye nokuqhelaniswa nokuqala kwakhona kunempembelelo enkulu kwi-evolution ye-aluminium texture, eyaphandwa ngu-Becker kunye ne-Panchanadiswaran ngokusebenzisa imifuniselo kunye nomzekelo we-crystal plasticity35. Iziphumo zamanani kuhlalutyo lwabo zivumelana kakuhle kunye neemvavanyo, nangona ezinye iziphumo zokulinganisa ziphambuka kwiimvavanyo ngenxa yokunciphisa iimeko ezisetyenzisiweyo zomda. Ngokufunda iipateni zeplastiki zekristale kunye nokubona ngokulinga, amaphepha aqengqelekayo e-aluminiyam abonisa ukubumbeka okwahlukileyo36. Iziphumo zibonise ukuba nangona i-stress-strain curves yamaphepha ahlukeneyo ayephantse afane, kukho ukungafani okuphawulekayo ekubunjweni kwabo ngokusekelwe kumaxabiso okuqala. U-Amelirad kunye no-Assempour basebenzise iimvavanyo kunye ne-CPFEM ukufumana i-curves-strain curves ye-austenitic stainless steel sheets37. Ukulinganisa kwabo kubonise ukuba ukwanda kobungakanani beenkozo kutshintshela phezulu kwi-FLD, okwenza ijika elilinganiselweyo. Ukongezelela, ababhali abafanayo baphanda umphumo we-grain orientation kunye ne-morphology ekubunjweni kwe-voids 38.
Ukongeza kwi-morphology yengqolowa kunye nokuqhelaniswa ne-austenitic stainless steels, imeko yamawele kunye nezigaba zesibini nazo zibalulekile. I-twinning yeyona ndlela iphambili yokwenza lukhuni kunye nokwandisa ubude kwintsimbi ye-TWIP 39. I-Hwang40 ibike ukuba ukubunjwa kweentsimbi ze-TWIP kwakungalunganga nangona impendulo eyaneleyo yokuqina. Nangona kunjalo, umphumo we-deformation twinning kwi-formability ye-austenitic sheet sheets ayizange ifundwe ngokwaneleyo. UMishra et al. I-41 yafunda i-austenitic steel stainless ukuze ibone ukuhlangana phantsi kweendlela ezahlukeneyo zoxinzelelo. Bafumanisa ukuba amawele anokuvela kwimithombo yokubola yawo omabini amawele avalelweyo kunye nesizukulwana esitsha samawele. Kuye kwaphawulwa ukuba amawele amakhulu enza phantsi koxinzelelo lwe-biaxial. Ukongezelela, kwaphawulwa ukuba ukuguqulwa kwe-austenite kwi- ({\ alpha} ^ {^ {\ prime}} \) -martensite kuxhomekeke kwindlela yoxinzelelo. Hong et al. I-42 iphande umphumo we-twinning-induced twinning kunye ne-martensite kwi-embrittlement ye-hydrogen phezu koluhlu lwamaqondo obushushu kwi-laser ekhethiweyo yokunyibilika kwe-316L yentsimbi ye-austenitic. Kwaphawulwa ukuba, kuxhomekeke kwiqondo lokushisa, i-hydrogen ingabangela ukungaphumeleli okanye ukuphucula ukubunjwa kwensimbi ye-316L. Shen et al. 43 ngokomfuniselo walinganisa umthamo we-deformation martensite phantsi komthwalo onzima kwiireyithi zokulayisha ezahlukeneyo. Kwafunyaniswa ukuba ukwanda koxinzelelo lwe-tensile kwandisa iqhezu lomthamo weqhezu le-martensite.
Iindlela ze-AI zisetyenziselwa isayensi kunye nobuchwepheshe ngenxa yokuguquguquka kwazo kwimodeli yeengxaki ezinzima ngaphandle kokusebenzisa iziseko zomzimba kunye nezibalo zengxaki44,45,46,47,48,49,50,51,52 Inani leendlela ze-AI landa. . UMoradi et al. I-44 isebenzise ubuchule bokufunda ngomatshini ukulungelelanisa iimeko zeekhemikhali ukuvelisa iincinci ze-nanosilica ezintle. Ezinye iimpawu zeekhemikhali nazo zinefuthe kwiipropati ze-nanoscale materials, eziphandwe kumanqaku amaninzi ophando53. Ce et al. I-45 isebenzise i-ANFIS ukuqikelela ukubunjwa kwe-carbon steel sheet sheet phantsi kweemeko ezahlukeneyo zokuqengqeleka. Ngenxa yokuqengqeleka okubandayo, ukuxinana kwe-dislocation kwintsimbi ethambileyo kuye kwanda kakhulu. Iintsimbi zekhabhoni ezingenanto zihluke kwiintsimbi ze-austenitic ezingenasici kwiindlela zazo zokuqina kunye nokubuyisela. Kwi-carbon steel elula, ukuguqulwa kwesigaba akwenzeki kwi-microstructure yensimbi. Ukongeza kwisigaba sesinyithi, i-ductility, fracture, machinability, njl. , 60. , 61, 62. Kutshanje, Chen et al. I-63 ifunde umphumo wokubanda okubandayo kwi-formability ye-304L yentsimbi. Bathathele ingqalelo ukuqwalaselwa kwe-phenomenological kuphela kwiimvavanyo zovavanyo ukuze baqeqeshe inethiwekhi ye-neural ukuqikelela ukubumba. Enyanisweni, kwimeko ye-austenitic stainless steels, izinto ezininzi zidibanisa ukunciphisa iimpawu ezinqabileyo zephepha. U-Lu et al.64 wasebenzisa i-ANFIS ukujonga umphumo weeparamitha ezahlukeneyo kwinkqubo yokwandiswa komngxuma.
Njengoko kuxoxwe ngokufutshane kuphononongo olungentla, isiphumo se-microstructure kwidayagram yomda wemilo ifumene ingqwalasela encinci kuncwadi. Ngakolunye uhlangothi, iimpawu ezininzi ze-microstructural kufuneka zithathelwe ingqalelo. Ngoko ke, phantse akunakwenzeka ukubandakanya zonke izinto ze-microstructural kwiindlela zokuhlalutya. Ngaloo ndlela, ukusetyenziswa kobukrelekrele bokwenziwa kunokuba luncedo. Kule nkalo, olu pho nonongo luphanda umphumo wenkalo enye yezinto ezincinci ze-microstructural, oko kukuthi ubukho be-martensite ebangelwa uxinzelelo, kwi-formability of stainless steel sheets. Olu phononongo luyohluka kwezinye izifundo ze-AI ngokumalunga nokubumba kuba ingqwalasela ikwiimpawu ze-microstructural kuneejiko zovavanyo ze-FLD. Siye safuna ukuvavanya ukwakheka kwentsimbi ye-316 kunye nemixholo eyahlukeneyo ye-martensite kusetyenziswa iindlela zovavanyo kunye nezobukrelekrele. Kwinqanaba lokuqala, intsimbi ye-316 enobunzima bokuqala obuyi-2 mm yayifakwe kwi-anneal kwaye ibanda igqitywe kwiindidi ezahlukeneyo. Emva koko, kusetyenziswa ulawulo lwe-metallographic, indawo ezalanayo ye-martensite yalinganiswa. Ukuqulunqwa kwamaphepha adibeneyo kunqunywe ngokusebenzisa uvavanyo lwe-hemisphere burst ukufumana umzobo we-strain limit diagram (FLD). Idatha efunyenwe kuye kamva yayisetyenziselwa ukuqeqesha kunye nokuvavanya inkqubo yokuphazamiseka kwe-neuro-fuzzy (ANFIS). Emva koqeqesho lwe-ANFIS, uqikelelo lwenethiwekhi ye-neural lufaniswa neseti entsha yeziphumo zovavanyo.
I-316 austenitic steel stainless steel sheet esetyenziswe kwisifundo esikhoyo inokwakheka kweekhemikhali njengoko kuboniswe kwiThebhile 1 kunye nobukhulu bokuqala be-1.5 mm. I-Annealing kwi-1050 ° C ngeyure ye-1 elandelwa ngukucima kwamanzi ukukhulula uxinzelelo oluseleyo kwiphepha kunye nokufumana i-microstructure efanayo.
I-microstructure ye-austenitic steels inokutyhilwa ngokusebenzisa i-etchants ezininzi. Enye yezona zinto zihamba phambili yi-60% ye-nitric acid emanzini adibeneyo, afakwe kwi-1 VDC kwi-120 s38. Nangona kunjalo, le etchant ibonisa kuphela imida yeenkozo kwaye ayikwazi ukuchonga imida ephindwe kabini, njengoko kubonisiwe kwi-Fig. Enye i-etchant i-acetate ye-glycerol, apho imida yamawele ingabonakaliswa kakuhle, kodwa imida yengqolowa ayikho, njengoko kuboniswe kwi-Fig. 1b. Ukongezelela, emva kokuguqulwa kwesigaba se-austenitic ye-metastable kwi- \({\ alpha} ^{^{\ prime}}\) -martensite isigaba sinokubonwa ngokusebenzisa i-glycerol acetate etchant, enomdla kwisifundo samanje.
I-Microstructure yepleyiti yensimbi 316 emva kwe-annealing, iboniswe ngama-etchants ahlukeneyo, (a) 200x, 60% \ ({\mathrm{HNO}}_{3}\) emanzini adibeneyo kwi-1.5 V ye-120 s, kunye (b) ne-200x , glyceryl acetate.
Amaphepha afakwe kwi-annealed anqunyulwa abe ngamaphepha angama-11 cm ububanzi kunye ne-1 m ubude bokuqengqeleka. Isityalo esibandayo esibandayo sinemiqulu emibini elinganayo kunye nobubanzi be-140 mm. Inkqubo ebandayo yokuqengqeleka ibangela ukuguqulwa kwe-austenite kwi-deformation martensite kwi-316 yensimbi engenasici. Ukukhangela umlinganiselo wesigaba se-martensite ukuya kwisigaba se-austenite emva kokubanda okuqengqelekayo kwiingqimba ezahlukeneyo. Kwikhiwane. I-2 ibonisa isampuli ye-microstructure ye-sheet metal. Kwikhiwane. I-2a ibonisa umfanekiso we-metallographic wesampulu eqengqelekayo, njengoko ijongwa kwi-directional perpendicular to sheet. Kwikhiwane. 2b usebenzisa i-software ye-ImageJ65, inxalenye ye-martensitic igxininiswe kumnyama. Ukusebenzisa izixhobo zale software yomthombo ovulekileyo, indawo yecandelo le-martensite inokulinganiswa. Itheyibhile 2 ibonisa amaqhezu aneenkcukacha ze-martensitic kunye nezigaba ze-austenitic emva kokuqengqeleka ekunciphiseni okuhlukeneyo kobukhulu.
I-Microstructure yephepha le-316 L emva kokuqengqeleka kwi-50% yokunciphisa ubukhulu, ijongwe nge-perpendicular kwindiza yephepha, ikhulise amaxesha angama-200, i-glycerol acetate.
Amaxabiso athiwe thaca kwiThebhile 2 afunyenwe ngokulinganisela amaqhezu e-martensite ngaphezulu kweefoto ezintathu ezithathwe kwiindawo ezahlukeneyo kwisampulu ye-metallographic efanayo. Ukongeza, kumkhiwane. I-3 ibonisa i-quadratic fitting curves ukuqonda ngcono umphumo wokuqengqeleka okubandayo kwi-martensite. Ingabonwa ukuba kukho ulungelelwaniso oluphantse lube ngumgca phakathi komlinganiselo we-martensite kunye nokuncipha kobunzima kwimeko eqengqelekayo ebandayo. Nangona kunjalo, ubudlelwane be-quadratic bunokumela ngcono olu budlelwane.
Ukwahluka kumlinganiselo we-martensite njengomsebenzi wokunciphisa ubukhulu ngexesha lokuqengqeleka okubandayo kweshiti lentsimbi elifakwe kuqala le-316.
Umda wokubunjwa uhlolwe ngokwenkqubo eqhelekileyo usebenzisa iimvavanyo ze-hemisphere burst37,38,45,66. Zizonke, iisampuli ezintandathu zenziwe nge-laser cutting kunye nemilinganiselo eboniswe kwi-Fig. 4a njengesethi yeesampuli zokulinga. Kwimeko nganye yeqhezu le-martensite, iiseti ezintathu zeesampulu zovavanyo zalungiswa kwaye zavavanywa. Kwikhiwane. I-4b ibonisa iisampulu ezisikiwe, ezipolishiwe, neziphawulweyo.
I-Nakazima yokubumba imida yobungakanani besampulu kunye nebhodi yokusika. (a) Imilinganiselo, (b) Sika kwaye uphawule imizekelo.
Uvavanyo lwe-hemispherical punching lwenziwa kusetyenziswa umshicileli we-hydraulic kunye nesantya sokuhamba se-2 mm / s. Imiphezulu yoqhagamshelwano ye-punch kunye neshidi ifakwe kakuhle ukuze kuncitshiswe umphumo wokungqubuzana kwimida yokwenza. Qhubeka uvavanya de kubonwe ukucutha okubalulekileyo okanye ikhefu kumzekelo. Kwikhiwane. I-5 ibonisa isampuli echithwe kwisixhobo kunye nesampuli emva kovavanyo.
Umda wokubunjwa unqunywe ngokusebenzisa uvavanyo lwe-hemispherical burst, (a) uvavanyo lwe-rig, (b) i-sample plate kwi-break in the test rig, (c) isampuli efanayo emva kovavanyo.
Inkqubo ye-neuro-fuzzy ephuhliswe nguJang67 sisixhobo esifanelekileyo sokuqikelelwa komda wegophe lokwakheka kwamagqabi. Olu hlobo lwenethiwekhi ye-neural eyenziweyo lubandakanya impembelelo yeeparamitha ezineenkcazo ezingacacanga. Oku kuthetha ukuba banokufumana naliphi na ixabiso lokwenene kumasimi abo. Amaxabiso alolu hlobo aphinda ahlelwe ngokwexabiso lawo. Udidi ngalunye lunemithetho yalo. Ngokomzekelo, ixabiso lobushushu linokuba naliphi na inani lokwenyani, yaye ngokuxhomekeke kwixabiso lalo, amaqondo obushushu anokuchazwa njengengqele, ephakathi, eshushu, neshushu. Kule nkalo, umzekelo, umgaqo wokushisa okuphantsi ngumgaqo othi "gqoka ibhatyi", kwaye umgaqo wokushisa obushushu "ukwanele i-T-shirt". Kwingqiqo engaqondakaliyo ngokwayo, isiphumo sivavanyelwa ukuchaneka kunye nokuthembeka. Ukudityaniswa kweenkqubo zenethiwekhi ye-neural enengqiqo engaqondakaliyo iqinisekisa ukuba i-ANFIS iya kubonelela ngeziphumo ezithembekileyo.
Umzobo 6 obonelelwe nguJang67 ubonisa inethiwekhi ye-neural fuzzy elula. Njengoko kubonisiwe, inethwekhi ithatha amagalelo amabini, kwisifundo sethu igalelo liyinani le-martensite kwi-microstructure kunye nexabiso loxinzelelo oluncinci. Kwinqanaba lokuqala lokuhlalutya, ixabiso legalelo lifazzy kusetyenziswa imithetho engaqondakaliyo kunye nemisebenzi yobulungu (FC):
Kuba \(i=1, 2\), ekubeni igalelo lithathwa ngokuba lineendidi ezimbini zenkcazo. I-MF inokuthatha nayiphi na i-triangular, i-trapezoidal, i-Gaussian, okanye nayiphi na enye imilo.
Ngokusekelwe kwiindidi \({A}_{i}\) kunye \({B}_{i}\) kunye nexabiso labo le-MF kwinqanaba le-2, imithetho ethile yamkelwa, njengoko kubonisiwe kuMfanekiso 7. Kule Umaleko, iziphumo zamagalelo ahlukeneyo ngandlel 'ithile zidityanisiwe. Apha, le migaqo ilandelayo isetyenziselwa ukudibanisa impembelelo yeqhezu le-martensite kunye namaxabiso amancinci amancinci:
Imveliso \({w}_{i}\) yolu maleko ibizwa ngokuba bubunzulu bomlilo. Oku kuqina kokutshisa kuqhelekile kumaleko wesi-3 ngokobu budlelwane bulandelayo:
Kumaleko 4, i Takagi kunye Sugeno imigaqo 67,68 zibandakanyiwe ukubala ukuthatha ingqalelo impembelelo amaxabiso yokuqala parameters igalelo. Lo maleko unobudlelwane obulandelayo:
Isiphumo \({f}_{i}\) sichatshazelwa ngamaxabiso aqhelekileyo kumaleko, anika isiphumo sokugqibela, amaxabiso aphambili e-warp:
apho \(NR\) imele inani lemithetho. Indima yenethiwekhi ye-neural apha kukusebenzisa i-algorithm yokuphucula yangaphakathi ukulungisa iiparamitha zenethiwekhi ezingaziwayo. Iiparameters ezingaziwayo ziziphumo zeparameters \(\ left\{{p}_{i}, {q}_{i}, {r}_{i}\right\}\), kunye neparameters ezinxulumene neMF. zijongwa njengemilo ye-chimes yomoya jikelele:
Imizobo yomda wemilo ixhomekeke kwiiparamitha ezininzi, ukusuka kwimichiza ukuya kwimbali ye-deformation ye-sheet metal. Ezinye iiparameters kulula ukuzivavanya, kubandakanywa iiparamitha zovavanyo lwe-tensile, ngelixa ezinye zifuna iinkqubo ezintsonkothileyo ezifana ne-metallography okanye ukumisela uxinzelelo olushiyekileyo. Kwiimeko ezininzi, kuyacetyiswa ukuba kwenziwe uvavanyo lomda woxinzelelo kwibhetshi nganye yephepha. Nangona kunjalo, ngamanye amaxesha ezinye iziphumo zovavanyo zingasetyenziselwa ukuqikelela umda wokubunjwa. Umzekelo, izifundo ezininzi zisebenzise iziphumo zovavanyo lwe-tensile ukumisela ukwakheka kwephepha69,70,71,72. Olunye uphando lubandakanya iiparitha ezininzi kuhlalutyo lwazo, ezifana nobukhulu beenkozo kunye nobukhulu31,73,74,75,76,77. Nangona kunjalo, akuloncedo ngekhompyutha ukubandakanya zonke iiparamitha ezivumelekileyo. Ngaloo ndlela, ukusetyenziswa kweemodeli ze-ANFIS kunokuba yindlela efanelekileyo yokujongana nale miba45,63.
Kweli phepha, impembelelo yomxholo we-martensite kumzobo wokubumba umda we-316 austenitic steel sheet iphandwa. Kulo mba, isethi yedatha yalungiswa kusetyenziswa iimvavanyo zovavanyo. Inkqubo ephuhlisiweyo ineenguqu ezimbini zegalelo: umlinganiselo we-martensite olinganiswe kwiimvavanyo ze-metallographic kunye noluhlu lweentlobo zobunjineli ezincinci. Isiphumo sisimo sobunjineli obuphambili bokwenza umda wegophe. Kukho iintlobo ezintathu zamaqhezu e-martensitic: amaqhezu amahle, aphakathi kunye naphezulu. Okuphantsi kuthetha ukuba umlinganiselo we-martensite ungaphantsi kwe-10%. Ngaphantsi kweemeko ezimodareyitha, umlinganiselo we-martensite usuka kwi-10% ukuya kwi-20%. Amaxabiso aphezulu e-martensite athathwa njengamaqhezu angaphezu kwama-20%. Ukongezelela, ubunzima besibini buneendidi ezintathu ezihlukeneyo phakathi kwe--5% kunye ne-5% kufuphi ne-axis ethe nkqo, esetyenziselwa ukumisela i-FLD0. Uluhlu olulungileyo kunye olubi zezinye iindidi ezimbini.
Iziphumo zovavanyo lwe-hemispherical ziboniswa kwi-FIG. Umzobo ubonisa i-6 imizobo yokubunjwa kwemida, i-5 yayo i-FLD yamaphepha aqengqelekayo. Inikwe indawo yokhuseleko kunye negophe layo eliphezulu elinomda wokwenza umda (FLC). Umzobo wokugqibela uthelekisa zonke ii-FLCs. Njengoko kunokubonwa kumfanekiso wokugqibela, ukunyuka kwenani le-martensite kwi-316 i-austenitic steel kunciphisa ukubunjwa kwesinyithi. Kwelinye icala, ukonyusa umyinge we-martensite ngokuthe ngcembe ijika i-FLC ibe yigophe elilinganayo malunga ne-axis ethe nkqo. Kwiigrafu ezimbini zokugqibela, icala lasekunene legophe liphezulu kancinane kunekhohlo, nto leyo ethetha ukuba ukumila koxinzelelo lwe-biaxial kuphezulu kune-uniaxial tension. Ukongeza, zombini ezincinci kunye nobunzima obukhulu bobunjineli phambi kokuba intamo yehle ngokunyuka kwenani le-martensite.
316 yenza igophe lomda. Impembelelo yomlinganiselo we-martensite kwi-formability of austenitic sheet sheets. (indawo yokhuseleko ye-SF, i-curve limit limit curve FLC, martensite M).
Inethiwekhi ye-neural yaqeqeshwa kwiiseti ze-60 zeziphumo zovavanyo kunye namaqhezu e-martensite ye-7.8, 18.3 kunye ne-28.7%. Isethi yedatha ye-15.4% martensite yayigcinelwe inkqubo yokuqinisekisa kunye ne-25.6% yenkqubo yokuvavanya. Impazamo emva kwe-150 epochs malunga ne-1.5%. Kwikhiwane. I-9 ibonisa ulungelelwaniso phakathi kwemveliso eyiyo (\({\epsilon }_{1}\), umthwalo osisiseko wobunjineli) obonelelwe ngoqeqesho novavanyo. Njengoko ubona, i-NFS eqeqeshiweyo iqikelela \({\epsilon} _{1}\) ngokwanelisayo kumacandelo esinyithi.
(a) Unxulumano phakathi kwamaxabiso aqikelelweyo kunye nawoqobo emva kwenkqubo yoqeqesho, (b) Impazamo phakathi kwexabiso eliqikelelweyo kunye nelona xabiso lomthwalo ongundoqo wobunjineli kwi-FLC ngexesha loqeqesho kunye nokuqinisekiswa.
Ngexesha elithile ngexesha loqeqesho, inethiwekhi ye-ANFIS ngokuqinisekileyo iyahlaziywa. Ukumisela oku, ukukhangela okufanayo kuyenziwa, okubizwa ngokuba yi "check". Ukuba ixabiso lephutha lokuqinisekisa liyaphambuka kwixabiso loqeqesho, inethiwekhi iqala ukuqeqesha kwakhona. Njengoko kubonisiwe kuMfanekiso 9b, ngaphambi kwe-epoch 150, umahluko phakathi kweecurves zokufunda kunye nokuqinisekiswa kuncinci, kwaye zilandela ngokulinganayo ijika elifanayo. Ngeli nqanaba, impazamo yenkqubo yokuqinisekisa iqala ukuphambuka kwigophe lokufunda, oluluphawu lwe-ANFIS overfitting. Ngaloo ndlela, inethiwekhi ye-ANFIS ye-round 150 igcinwe ngephutha le-1.5%. Emva koko uqikelelo lwe-FLC lwe-ANFIS luyaziswa. Kwikhiwane. I-10 ibonisa i-curves eqikelelweyo kunye neyokwenene kwiisampuli ezikhethiweyo ezisetyenziswe kwinkqubo yoqeqesho kunye nokuqinisekisa. Ekubeni idatha evela kula magophe yayisetyenziselwa ukuqeqesha inethiwekhi, akumangalisi ukujonga uqikelelo olusondeleyo kakhulu.
Olona vavanyo lwe-FLC kunye ne-ANFIS iijika ezixeliweyo phantsi kweemeko ezahlukeneyo zomxholo we-martensite. La magophe asetyenziswa kwinkqubo yoqeqesho.
Imodeli ye-ANFIS ayiyazi into eyenzekayo kwisampuli yokugqibela. Ngoko ke, sivavanye i-ANFIS yethu eqeqeshiweyo ye-FLC ngokuthumela iisampuli kunye neqhezu le-martensite ye-25.6%. Kwikhiwane. I-11 ibonisa uqikelelo lwe-ANFIS FLC kunye ne-FLC yovavanyo. Impazamo enkulu phakathi kwexabiso eliqikelelweyo kunye nexabiso lokulinga yi-6.2%, ephezulu kunexabiso eliqikelelweyo ngexesha loqeqesho kunye nokuqinisekiswa. Nangona kunjalo, le mpazamo yimpazamo enyamezelekayo xa kuthelekiswa nezinye izifundo eziqikelela i-FLC ithiyori37.
Kwishishini, iiparamitha ezichaphazela ukwakheka zichazwa ngendlela yolwimi. Umzekelo, "iinkozo ezirhabaxa zinciphisa ukumila" okanye "ukwanda kokusebenza okubandayo kunciphisa i-FLC". Igalelo kuthungelwano lwe-ANFIS kwinqanaba lokuqala luhlelwa ngokweendidi zeelwimi ezifana neziphantsi, eziphakathi kunye neziphezulu. Kukho imigaqo eyahlukeneyo yeendidi ezahlukeneyo kwinethiwekhi. Ke ngoko, kushishino, olu hlobo lothungelwano lunokuba luncedo kakhulu malunga nokubandakanya izinto ezininzi kwinkcazo yolwimi kunye nohlalutyo. Kulo msebenzi, sizame ukuqwalasela enye yeempawu eziphambili ze-microstructure ye-austenitic stainless steels ukwenzela ukusebenzisa amathuba e-ANFIS. Isixa se-martensite esibangelwa uxinzelelo lwe-316 sisiphumo esithe ngqo sokusebenza okubandayo kwezi zifakelo. Ngokusebenzisa umfuniselo kunye nohlalutyo ANFIS, kuye kwafunyaniswa ukuba ukwandisa umlinganiselo martensite kolu hlobo austenitic steel stainless kukhokelela ekuncipheni kakhulu FLC ipleyiti 316, ukuze ukwandisa umlinganiselo martensite ukusuka 7.8% ukuya 28.7% kunciphisa FLD0 ukusuka kwi-0.35. ukuya kuthi ga kwi-0.1 ngokulandelelanayo. Ngakolunye uhlangothi, inethiwekhi ye-ANFIS eqeqeshiwe kunye neqinisekisiweyo inokuqikelela i-FLC isebenzisa i-80% yedatha yovavanyo ekhoyo kunye nephutha eliphezulu le-6.5%, eyona mida eyamkelekileyo yephutha xa kuthelekiswa nezinye iinkqubo zethiyori kunye nobudlelwane be-phenomenological.
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Ixesha lokuposa: Jun-08-2023