- Tytuł:
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Konečno-èlementnoe modelirovanie èlektrokontaktnogo spekaniâ pravâŝih fil’er stroitel’noj armatury
Finite-element model of electrocontact sintering of straightening dies for construction fittings - Autorzy:
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Goranskij, G.G.
Pobol, A.I - Powiązania:
- https://bibliotekanauki.pl/articles/2067681.pdf
- Data publikacji:
- 2019
- Wydawca:
- Politechnika Częstochowska
- Tematy:
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mathematical model
electrocontact sintering
straightening dies
modelowanie matematyczne
spiekanie
spiekanie elektrostykowe - Opis:
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Razrabotana matematičeskaâ model’ processa èlektrokontaktnogo spekaniâ ÈKS) tverdosplavnyh kompozicij pri izgotovlenii pravâŝih fil’er stroitel’noj armatury. Model’ pozvolâet rassčitat’ uplotnenie pressovki, diagrammu poslojnogo raspredeleniâ plotnosti, diagrammy polej temperatur i davlenij, raspredelenie plotnosti toka po sečeniû pressovki i egoizmenenie v zavisimosti ot otnositel’noj plotnosti. Aprobirovannye v modeli analitičeskie zavisimosti rasprostraneny na proizvol’nuû geometriû fil’er pri pomoŝi konečno-èlementnogo modelirovaniâ s korrektirovkoj svojstv materiala po analitičeskim zavisimostâm, ishodâ iz plotnosti pressovki. Ocenka adekvatnosti modeli provedena po krivoj pressuemosti. Rezul’tatami rasčetov dokazan i èksperimental’no podtveržden èffekt sniženiâ termobaričeskih parametrov kompaktirovaniâ spekaemoj tverdosplavnoj kompozicii pri ee modificirovanii termoaktiviruûŝej dobavkoj, blagodarâ čemu povyšena stojkost’ keramičeskih press-form i na 40% snižen procent koničeskoj poverhnosti zagotovki fil’ery.
A mathematical model of the process of electrocontact sintering of carbide compositions in the manufacture of straightening dies of construction fittings has been developed. The model allows to calculate the compression of the compact, the diagram of the layer-by-layer density distribution, the diagrams of temperature and pressure fields, the distribution of current density over the cross-section of the compact and its change depending on the relative density. The analytical dependences, tested in the model, are extended to arbitrary geometry of the dies, using finite element modeling with adjustment of material properties according to analytical dependencies, based on the density of pressing. An assessment of the adequacy of the model was carried out by the compressibility curve. The results of calculations proved and experimentally confirmed the effect of reducing the thermobaric parameters of compacting the sintered carbide composition, when it is modified with a thermosetting additive, which increased the resistance of ceramic molds and reduced the percentage of rejects by 40%. The tensile radial deformations along the conical surface of the die blank are predicted. - Źródło:
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Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2019, 25 (175); 40-49
0860-7214 - Pojawia się w:
- Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
- Dostawca treści:
- Biblioteka Nauki
Artykuł