Daim duab 1.Kev ncua sijhawm tawg hauv epoxy potting feem ntau pib ntawm cov npoo thiab cov hlau lead tawm - tsis nyob rau sab nrauv. Kev sib dhos dhau tag nrho cov kev xeem thawj zaug; Qhov tsis ua haujlwm tshwm sim tom qab 50-200 thermal cycles hauv kev pabcuam.
Lub rooj sib txoos dhau tag nrho cov kev xeem tsim nyog. Nyob zoo -pot: pass. Kev kuaj pom pom: huv. Thermal shock ntawm -40℃rau +85 degree, 50 cycles: dhau. Nws nkoj. Kaum plaub lub hlis tom qab, thawj daim teb rov qab tuaj txog - cov kab plaub hau tawg ntawm lub potting - mus rau - vaj tse interface, delamination ntawm cov hlau lead tawm cov ntsiab lus, intermittent opens ntawm chav tsev uas ntsuas huv ntawm cov khoom xa tuaj. Pab pawg engineering thov hla -sections. Cov kab nrib pleb yog nyob rau hauv epoxy potting, tsis nyob rau hauv cov khoom. Lub sijhawm kho nyob rau hauv cov ntaub ntawv ntau lawm yog teev kom raug. Cov khoom siv tsis tau hloov. Qhov kev tshawb nrhiav kaw li "cov ntaub ntawv qaug zog - nyob rau hauv qhov kev xav tau ntawm lub neej hloov pauv."
Nws tsis yog khoom qaug zog. Nws yog residual stress, teem lub sij hawm kho, uas tsis tau ntsuas thiab yeej tsis tshwm sim nyob rau hauv cov kev tsim nyog ib theem zuj zus - vim hais tias cov kev tsim nyog tsis suav nrog lub thermal cycles uas yuav tsum tau tso tawm.Ncua sijhawm tawg hauv tuab-section epoxy potting yog yuav luag txhua lub sijhawm kho qhov tsis xws luag, tsis yog cov khoom siv tsis raug. Qhov tawg yog tsim thaum kho. Nws tshwm nyob rau hauv daim teb.
Exotherm Mechanism: Vim li cas Thick Sections kho txawv ntawm nyias nyias
Epoxy cross-kev sib txuas yog cov tshuaj tiv thaiv exothermic. Thaum cov resin thiab hardener sib xyaw ua ke thiab cov khoom sib tov raug tshav kub, cov tshuaj tiv thaiv tsim nws tus kheej cua sov ntxiv rau kev nqus cua sov los ntawm qhov cub. Hauv cov qauv nyias nyias - hom siv rau UL cov khoom siv kuaj - tus kheej- tsim cov cua sov dissipates sai sai rau lub qhov cub cua los ntawm qhov chaw loj - rau - ntim piv. Cov qauv ntsuas kub zoo taug qab lub qhov cub teeb tsa thoob plaws lub voj voog kho.
Nyob rau hauv ib tug tuab potted seem - ib tug transformer core nrog ib tug 20 hli ncuav, ib lub hwj chim module nrog ib tug 25 mm sau qhov tob - saum npoo - rau - ntim piv yog tsawg dua. Thaum tshav kub kub los ntawm exothermic cov tshuaj tiv thaiv nyob rau hauv lub hauv paus ntawm seem muaj ib tug ntev diffusion txoj kev mus rau saum npoo, thiab cov resin ib puag ncig uas tseem tsis tau tag nrho reacted ua raws li thermal rwb thaiv tsev. Qhov kub tseem ceeb overshoos qhov cub setpoint. Hauv ib qho -theem 120℃kho ntawm 20 mm seem, cov tub ntxhais kub ntawm 140-165℃tsis txawv, txawm tias thaum lub qhov cub tau teem rau ntawm 120℃thiab qhov saum npoo ntawm qhov ntsuas 120℃nrog lub thermocouple nto.
Qhov no overshoot tseem ceeb vim hais tias tus nqi ntawm tus ntoo khaub lig-linking nce sharply nrog kub. Lub hauv paus tseem ceeb ntawm ntu, khiav 20-45℃saum lub qhov cub qhov chaw, ua tiav nws thawj tus ntoo khaub lig- txuas nrawm dua li cov khoom siv sab nraud. Tus ntoo khaub lig- txuas network hauv cov tub ntxhais kawm tau zoo "khov" rau hauv txoj haujlwm thaum cov txheej txheej sab nrauv tseem ua haujlwm. Thaum lub rooj sib txoos txias tom qab kho, ob thaj chaw cog lus thermally - tab sis lawv cog lus los ntawm cov ntsiab lus pib sib txawv thiab ntawm tus nqi sib txawv, vim tias cov tub ntxhais tseem muaj cov iav khov khov khov thaum cov txheej txheej sab nrauv ua tiav lawv lub network tsim.
Qhov tshwm sim yog qhov xauv - nyob rau hauv kev ntxhov siab nyob rau hauv qhov kho kom zoo nkauj: residual tensile stress nyob rau hauv cov khoom siv sab nrauv thiab residual compressive kev nyuaj siab nyob rau hauv cov tub ntxhais. Qhov no tsis yog ib qho kev xav - nws yog qhov dej zoo -tus yam ntxwv tshwm sim nyob rau hauv tuab -section thermoset ua, piv rau cov kev ntxhov siab nyob hauv cov iav ceev ceev.
Daim duab 2.Hauv ib qho -theem 120℃kho ntawm 20 mm seem, cov tub ntxhais kub ib txwm dhau ntawm qhov cub teeb los ntawm 20-45℃thaum hla- txuas exotherm. Ob -theem profile txwv qhov overshoot los ntawm kev pib hla- txuas ntawm 80℃ua ntej qhov siab dua -kub theem yog siv.
Yog vim li cas lub rooj sib txoos dhau qhov kev sim pib
Daim duab 3.Tom qab ib zaug xwb -theem siab- qhov kub thiab txias, cov seem kho yog muab xauv- nyob rau hauv kev ntxhov siab: residual nro nyob rau hauv cov txheej txheej, residual compression nyob rau hauv cov tub ntxhais. Lub xeev kev ntxhov siab no ntxiv rau lub voj voog thermal kev ntxhov siab hauv kev pabcuam, ua kom qaug zog tawg pib.
Lub zog tensile seem nyob rau hauv cov khoom siv potting sab nraud los ntawm ib qho -theem tuab- ntu kho yog feem ntau qis dua qhov kawg tensile lub zog ntawm epoxy ntawm chav tsev kub. Qhov kho tau tag nrho tsis tawg thaum kho - lossis yog tias nws ua, micro- tawg yog qis dua qhov kev kuaj pom ntawm kev kuaj pom. Nyob zoo-kav ntsuas ntawm qhov ntsuas hluav taws xob dhau los vim tias qhov ua tau zoo ntawm lub zog dielectric ntawm me ntsis kev ntxhov siab matrix tsis txawv ntawm qhov kev siv tsis txaus ntseeg.
Qhov teeb meem nthuav tawm nws tus kheej nyob rau hauv thermal cycling, thiab cov txheej txheem yog ncaj nraim: txhua lub voj voog thermal los ntawm qhov kub qis mus rau qhov kub siab ua rau lub zog tensile thiab compressive kev ntxhov siab nyob rau hauv cov khoom siv potting, uas tau tsav los ntawm CTE tsis sib haum ntawm epoxy, cov khoom embedded, thiab vaj tse. Ntawm qhov chaw muaj kev ntxhov siab - cov ces kaum, cov npoo ntawm cov khoom, cov ntsiab lus tawm, thiab cov potting - mus rau - vaj tsev interface - lub cyclic stress amplitude yog siab tshaj. Qhov seem tensile stresses los ntawm kev kho ntxiv ncaj qha mus rau lub cyclic tensile stresses ntawm cov chaw no, vim hais tias ob leeg yog tensile stresses uas ua nyob rau hauv tib txoj kev thaum lub sij hawm thermal voj voog lub cua sov theem.
Qhov sib xyaw ua ke kev ntxhov siab amplitude - residual kho kev ntxhov siab ntxiv rau cyclic thermal stress - kuj tseem yuav qis dua lub zog tensile kawg ntawm epoxy ntawm thawj lub voj voog. Nws nce mus txog qhov pib ua rau qaug zog tom qab ntau lub voj voog uas nyob ntawm qhov kev ntxhov siab tshwj xeeb, CTE mismatch, lub voj voog thermal amplitude, thiab cov duab ntawm cov kev ntxhov siab. Qhov no yog vim li cas qhov tsis ua haujlwm tshwm sim tom qab 50-200 lub voj voog, tsis yog ntawm kev sim thawj zaug. Nws tsis yog cov khoom degradation dhau lub sij hawm - nws yog kev ntxhov siab tsub zuj zuj mus rau qhov pib.
Yog vim li cas qhov kev ua tsis tiav no yog Systematically Misidentified
Thaum qhov kev tshawb nrhiav tsis ua haujlwm pom pom cov kab nrib pleb hauv cov khoom siv epoxy potting, ntau qhov kev qhia tsis tseeb yog ntau:
"Cov ntaub ntawv qaug zog"- epoxy ua tsis tiav hauv kev qaug zog, txhais tau tias cov khoom siv tsis txaus rau daim ntawv thov. Cov txheej txheem tiag tiag yog kev ntxhov siab los ntawm kev sib xyaw ua ke ntawm qhov seem kho kev ntxhov siab thiab cyclic thermal stress. Hloov mus rau lwm cov khoom siv epoxy yam tsis hloov cov txheej txheem kho yuav rov ua dua qhov tsis ua haujlwm, vim tias cov txheej txheem kev ntxhov siab seem yog txheej txheem -nyob ntawm, tsis yog cov khoom siv- nyob ntawm.
"Thermal shock puas"- lub rooj sib txoos tau raug cuam tshuam rau qhov tshwm sim ntawm qhov kub tsis zoo. Qhov no qee zaum muaj tseeb, tab sis cov qauv tawg los ntawm thermal shock feem ntau pib ntawm sab nrauv thiab nthuav tawm sab hauv. Cov kab nrib pleb residual kev ntxhov siab feem ntau pib ntawm cov duab puab sab hauv (cov npoo, cov hlau lead tawm) thiab nthuav tawm sab nraud. Lub hauv paus chiv keeb qhov chaw sib txawv ntawm ob lub tswv yim ntawm tus ntoo khaub lig-section.
"Tsis txaus potting adhesion"- epoxy tsis zoo rau lub substrate lossis vaj tse. Delamination ntawm potting- vaj tse interface tuaj yeem tshwm sim los ntawm kev npaj tsis txaus, tab sis nws kuj tuaj yeem tshwm sim los ntawm qhov seem ntawm tensile kev nyuaj siab tshaj lub zog ntawm interfacial bond. Qhov tom kawg yuav tsum tsis muaj kev npaj deg tsis ua haujlwm - nws tshwm sim ntawm qhov chaw huv, raug npaj kom raug thaum qhov kev ntxhov siab seem txaus txaus.
"Component quality"- ib qho kev coj ua lossis kev txiav tawm ua tsis tiav. Nyob rau hauv cov ntaub ntawv uas lub crack propagates mus rau ib tug tivthaiv interface, lub tawg zoo li yuav misidentified raws li ib tug tivthaiv tsis ua hauj lwm. Hla -section tsom xam qhov txawv ntawm qhov tawg uas pib ntawm cov khoom siv thiab ib qho uas nthuav tawm rau nws los ntawm ib puag ncig epoxy.
Nyob rau hauv feem ntau ntawm cov misidentifications, cov ntaub ntawv kho cov txheej txheem yuav tsis raug tshuaj xyuas raws li ib feem ntawm kev tshawb nrhiav tsis ua hauj lwm. Lub sijhawm kho tau teev nyob rau hauv cov neeg taug kev ntau lawm yog qhov kev qhia tshwj xeeb - vim hais tias cov lus qhia tshwj xeeb teev lub qhov cub teeb thiab lub sijhawm ua haujlwm, tsis yog qhov kub thiab txias tau ua tiav ntawm qhov tseem ceeb ntawm ntu potted. Cov txheej txheem kev ntxhov siab residual tsis pom hauv cov ntaub ntawv tsim khoom.
Ob -Txoj Kev Kho Mob Profile: Yuav Ua Li Cas Txo Kev Nyuaj Siab
Ob -theem kho profile hais txog exotherm mechanism ncaj qha los ntawm kev faib tus ntoo khaub lig- txuas cov tshuaj tiv thaiv rau hauv ob theem tswj:
Theem 1 ntawm 80 degreepib tus ntoo khaub lig- txuas cov tshuaj tiv thaiv ntawm qhov kub qis, qhov twg cov tshuaj tiv thaiv qis dua thiab cov hluav taws xob hluav taws xob hluav taws xob hauv ib lub sij hawm qis dua. Ntawm 80 degree, lub kaw lus pib tsim cross-link ceev - txaus los tiv thaiv qhov nrawm nrawm ntawm cov tshuaj tiv thaiv uas yuav tshwm sim yog tias lub kaw lus raug tam sim ntawd rau 120℃. Qhov qis dua thawj zaug cov tshuaj tiv thaiv txo tus kheej -tsim exotherm, ua kom cov tub ntxhais kub nyob ze rau ntawm qhov cub teeb. The cross-link density develops more uniformly across the section depth during Stage 1.
Theem 2 ntawm 120 degreeces tsav lub system mus rau tag nrho kho. Thaum lub sijhawm Theem 2 pib, Theem 1 network twb tau tsim kom muaj kev nruj txaus los txwv cov exotherm ntxiv thaum Theem 2. Qhov seem hla -txuas ntxiv tshwm sim hauv lub network uas yog ib feem txwv los ntawm Theem 1 tus qauv, thiab qhov kub sib txawv ntawm cov tub ntxhais thiab qhov chaw nyob rau theem 2 yog txo qis heev piv rau ib zaug {{7}.
Qhov tshwm sim yog ib ntu kho nrog qis dua qhov kev ntxhov siab tensile hauv cov khoom siv sab nrauv. Lub rooj sib txoos tseem muaj qee qhov kev ntxhov siab nyob ib puag ncig - tsis muaj txheej txheem kho tau tshem tawm tag nrho - tab sis qhov loj me tau txo qis txaus tias qhov sib xyaw ua ke ntawm cov kev ntxhov siab ntxiv ntxiv rau kev ntxhov siab thermal nyob qis dua qhov pib qaug zog tawg rau lub neej ua haujlwm ntev dua.
Qhov no tsis yog kev sib cav theoretical. Nws raug pom zoo: cov rooj sib txoos uas tau ntsib qeeb qeeb nrog ib qho -theem 120℃kho ntawm tib lub potting cov ntaub ntawv tau qhia txog kev pab cuam lub neej ntev dua tom qab hloov mus rau ob-stage profile, yam tsis hloov cov khoom, geometry, lossis lwm yam txheej txheem parameter. Lub sijhawm kho mob yog qhov sib txawv.
Qhov Tseem Ceeb Tshaj Plaws hauv Kev Xeem Txuj Ci
Cov txheej txheem kev tsim nyog tau txais txiaj ntsig zoo sib xws rau cov rooj sib txoos hauv potted feem ntau suav nrog qee qhov tsawg ntawm cov voj voog thermal - 50 mus txog 100 lub voj voog yog muaj nyob rau hauv IEC thiab UL cov qauv rau cov khoom siv tshwj xeeb. Ib qho tuab -section potted los ua ke nrog cov kev ntxhov siab seem los ntawm ib qho - theem kho yuav dhau 50 lossis 100 lub voj voog thermal ua ntej qhov kev ntxhov siab nce mus txog qhov pib tawg. Thaum qhov tsis ua haujlwm tshwm sim ntawm 150–200 cycles hauv kev pabcuam - uas tuaj yeem sib haum rau 12–18 lub hlis ntawm kev ua haujlwm ntawm ib lossis ob lub voj voog thermal hauv ib hnub - qhov kev tsim nyog ib ntus tsis nthuav tawm nws.
Qhov no yog qhov sib txawv ntawm qhov systematic: qhov kev tsim nyog tau ua tiav, qhov kev xeem dhau, tab sis qhov kev ua tsis tiav ua haujlwm ntawm lub voj voog ntev dua li qhov ntsuas npog. Kev tsim kho qhov txheej txheem kho tau qhia txog qhov kev ntxhov siab seem yuav tsum tau ua kom ntev dua qhov tsim nyog thermal voj voog ib ntus, lossis cov txheej txheem kho uas txo cov kev ntxhov siab seem mus rau theem uas tus qauv tsim nyog lub voj voog suav yog qhov tseeb ntawm kev pabcuam lub neej.
Ob - theem kho profile txo qhov seem ntawm qhov kev ntxhov siab, uas txo cov kev ntxhov siab tag nrho ntawm ib lub voj voog. Qhov no, ua ke nrog tib lub voj voog thermal suav hauv qhov kev tsim nyog, muab kev lees paub tiag tiag es tsis yog kev lees paub uas raug txwv los ntawm qhov kev ntsuas qhov tsis muaj peev xwm los qhia qhov ua tsis tiav.
Kev txheeb xyuas seb tus qauv tsim tam sim no puas muaj kev pheej hmoo
Cov qauv tsim thiab txheej txheem hauv qab no qhia tias muaj kev pheej hmoo siab ntxiv nyob rau hauv tuab -section epoxy potting:
Potting seem qhov tob tshaj 10 mm nyob rau hauv txhua qhov ntev.
Lub sijhawm kho tam sim no yog ib zaug -theem ntawm 100℃lossis siab dua.
Tsis muaj thermocouple saib xyuas ntawm cov tub ntxhais kub thaum kho - tsuas yog qhov kub thiab txias ntawm qhov cub tau kaw.
Kev ua tsis tiav keeb kwm qhia tau hais tias cov kab nrib pleb tshwm sim tom qab ntau lub voj voog thermal hauv kev pabcuam, nrog cov rooj sibtham dhau los kuaj thawj zaug.
Cov keeb kwm tawg qhov chaw ntawm tus ntoo khaub lig- ntu yog nyob rau ntawm cov npoo, cov hlau lead tawm, los yog cov duab puab sab hauv - tsis nyob rau sab nrauv.
Kev tsim nyog thermal voj voog suav yog 50 lub voj voog lossis tsawg dua, thiab kev pabcuam lub neej yuav tsum koom nrog 200 lossis ntau dua thermal cycles.
Cov kauj ruam ua pov thawj yog los tsim cov qauv kuaj ntawm qhov tseeb cov khoom tuab thiab kho lub sijhawm, embed lub thermocouple ntawm qhov nruab nrab ntawm ntu, thiab sau qhov tseeb qhov kub thiab txias profile thaum kho. Yog hais tias qhov kub ntawm qhov tseem ceeb tshaj qhov cub qhov cub thaum lub sij hawm tus ntoo khaub lig- txuas theem, lub exotherm mechanism yog active thiab residual stress yog generated.
HDT, Tg, thiab RTI: Thermal Properties uas txhais lub hnab ntawv ua haujlwm
Ib ob -theem kho profile, ua kom zoo, tsim cov khoom kho nrog cov khoom siv thermal tag nrho: Tg 117.8℃los ntawm TMA (ASTM E831), HDT 130 degree, RTI 130℃hauv qab UL File E120665. Cov txiaj ntsig no txhais lub hnab ntawv ua haujlwm rau lub rooj sib txoos kho:
Tg 117.8 degree- iav hloov kub ntsuas los ntawm thermomechanical tsom xam; siv qhov no rau CTE kev suav nyiaj txiag thiab ntsuas qhov ruaj khov. Saum toj no Tg, CTE nce los ntawm 49.772 ppm /℃(1, hauv qab Tg) rau 148.482 ppm /℃(2, saum toj no Tg) - kwv yees li 3 × nce.
HDT 130 degree- qhov kub thiab txias ntawm cov khoom kho deflectors raws li tus qauv 1.8 MPa load; siv qhov no rau mechanical load-cov kabmob ntawm qhov kub siab.
RTI 130 degree- UL qhov kev ntsuam xyuas rau kev ruaj ntseg hluav taws xob thiab khoom siv hluav taws xob txuas ntxiv; Cov qauv tsim yuav tsum tau txais kev pabcuam txuas ntxiv siab tshaj 90℃uas nyob sab nraud ntawm E532 / H532 (RTI 90 degree) yog nyob rau hauv E536 / H536 qhov ntsuas.
Cov cuab yeej thermal no tsuas yog ua tiav thaum ob - theem kho kom tiav. Ib qho kev sib dhos uas tau txais Theem 1 nkaus xwb - lossis Theem 1 ntawm qhov kub tsis txaus - yuav muaj Tg thiab HDT hauv qab cov nqi no. Cov ntaub ntawv pov thawj kho nrog cov khoom tsim tawm thiab kuaj rau HDT muab cov txheej txheem pov thawj: qhov ntsuas HDT tau qis dua 130℃qhia tias tsis tiav Theem 2 kho.
Yam khoom lag luam rau tuab -Section Potting nrog Curing Stress Control
E536/H536 yog ob qho -cov khoom siv, UL 94 V-0 nplaim- retardant epoxy potting compound engineered tshwj xeeb rau tuab - ntu daim ntawv thov uas kho kev ntxhov siab yog thawj qhov tsis ua haujlwm. Nws ob-theem kho profile (80℃× 2 teev + 120℃× 4 teev) txwv core exotherm thaum lub sij hawm Theem 1 thiab ua tiav tag nrho cov khoom tsim nyob rau theem 2. RTI 130 degree, HDT 130 degree, Shore D 89, thiab yam tsawg kawg nkaus UL ntaub ntawv pov thawj thickness ntawm 1.58 mmblack (UL-1. E120665.
Nws tsis tsim nyog rau cov ntawv thov uas xav tau thermal conductivity siab dua 0.5 W / m·K (siv E533 / H533 rau qhov ntawd) lossis rau chav -kub kho qhov chaw tsim khoom (siv E532 / H532 rau qhov ntawd). Ob - theem kho profile yuav tsum muaj qhov cub muaj peev xwm ntawm ob qho tib si 80℃thiab 120℃nrog kev tswj ramp thiab tuav lub sijhawm.
→ 🔗E536/H536 Product Page - Technical Data, TMA Test Report, Application Notes
Cov lus nug tseem ceeb Engineering
Kuv yuav ua li cas thiaj paub seb kuv lub rooj sib txoos tam sim no puas muaj kev ntxhov siab los ntawm nws txoj kev kho?
Txoj kev ncaj qha yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau, nws raug nquahu kom siv cov thermocouple hauv nruab nrab ntawm lub lauj kaub. Yog tias qhov kub tseem ceeb tshaj qhov cub qhov kub ntawm ntau tshaj 10-15℃thaum lub sij hawm tus ntoo khaub lig-txuas txuas, qhov seem seem raug tsim tawm. Txoj kev tsis ncaj ncees yog ua kom nrawm nrawm nrawm rau lub voj voog suav ntau dua li qhov kev tsim nyog (xws li, 500 cycles) thiab tshuaj xyuas qhov chaw pib tawg. Cov kab nrib pleb uas pib ntawm cov duab puab sab hauv es tsis yog lub ntsej muag sab nrauv zoo ib yam nrog cov kev ntxhov siab uas nyob hauv tus neeg tsav tsheb.
Yog tias kuv hloov los ntawm ib qho -theem mus rau ob- lub sijhawm kho mob theem ntawm kuv lub rooj sib txoos uas twb muaj lawm, kuv puas yuav tsum tau tsim nyog?
Feem ntau, yog - yam tsawg kawg nkaus, cov txheej txheem kho yuav tsum raug cuam tshuam los ntawm cov txheej txheem tsim khoom thiab raug lees paub ntawm cov qauv kuaj kom paub meej tias cov khoom kho tau raws li cov qauv tsim. Rau cov rooj sib txoos uas yog ib feem ntawm UL- cov khoom lag luam uas tau teev tseg, qhov kev hloov pauv rau lub sijhawm kho potting compound tuaj yeem ua rau muaj kev ceeb toom lossis rov ua dua - qhov yuav tsum tau ntsuas nrog rau lub npe. Qhov no yuav tsum tau lees paub ua ntej siv cov txheej txheem hloov. Qhov kev lees paub yuav tsum suav nrog thermal cycling mus rau ib lub voj voog suav txaus kom paub meej tias hom kev ua tsis tiav uas tau tshwm sim ntawm lub sijhawm kho ua ntej tsis tshwm sim ntawm qhov tshiab.
Puas tuaj yeem ntsuas qhov kev ntxhov siab uas tsis yog - puas tsuaj ntawm cov rooj sib txoos ua tiav?
Tsis yog-Kev ntsuas kev puas tsuaj ntawm cov kev ntxhov siab nyob hauv epoxy yog kev siv cov txheej txheem xws li photoelasticity lossis micro-Raman spectroscopy, tab sis cov no tsis yog cov cuab yeej tsim khoom niaj hnub. Kev puas tsuaj ntoo khaub lig- ntu kev soj ntsuam raws li kev soj ntsuam kab mob microscopic yog qhov ua tau zoo dua rau kev txheeb xyuas ntau lawm. Cov cuab yeej pov thawj tsim khoom siv tau yooj yim tshaj plaws yog cov khoom pov thawj: cov qauv kho tau tsim ib txhij nrog txhua pawg tsim khoom, khaws cia thiab kuaj xyuas ib ntus los ntawm kev caij tsheb kauj vab thiab hla -section soj ntsuam. Deviation nyob rau hauv cov ntaub ntawv pov thawj kwv yees, tab sis tsis lav, dab tsi yog tam sim no nyob rau hauv lub ntau lawm batch.
Cov kauj ruam tom ntej - Hu rau Fong Yong Tshuaj
