The spiral seam submerped arc welded steel pipe e phunngoa ka ho potoloha 'me e qala ho kena sebopeho se bonolo.Tlas'a ketso ea tri-cone, drill e qala ho hlahisa deformation ea elastic ea stratum ebe e tlosoa tlas'a khatello ea tri-cone.Sebakeng se ts'oanang, mobu o bonolo ke letsopa le nang le homogeneous, ho sa tsotellehe hore na stratum le mapetsong a mobu ke ofe.Ho cheka ka tsela e ts'oanang ho etsoa ka mokhoa o sa lebelloang, 'me sebopeho se kopane ka mokhoa o sa reroang le o matla le bitana ea rolara.Ho hohlana ho etsahala ha khoune e kopana le mobu.Matla a susumetsang a etsa hore seam spiral seam e ka tlas'a metsi arc welded steel pipe e thothomele.Ha karoloana ea tri-cone e tloha sebopehong se bonolo ho ea ho sebopeho se thata, ntle ho pelaelo e tla hlahisa thothomelo e kholo ea lateral le holimo le tlase ho sisinyeha.

Ha lebelo la ho phunya e le 0.008m/s mme lebelo la ho potoloha ha nyane ke 2 radians/s, pseudo-strain curve nakong ea ts'ebetso e tsoelang pele ea "roller cone bit" e kenyelletsa viscosity le elasticity.Leha ho le joalo, kaha lentsoe la viscous hangata le laola, phetoho ea boholo ba matla hore e be matla a pseudo strain e ke ke ea etsolloa.The deformation eneji ea spiral seam submerged arc welded steel pipe ke matla a mantlha a sebelisoang ho laola deformation ea hourglass.Haeba matla a pseudo a le holimo haholo, ho bolela hore matla a matla a laolang ho senyeha ha hourglass a maholo haholo, 'me letlooeng le lokela ho hloekisoa kapa ho fetoloa.Ho fokotsa matla a feteletseng a pseudo.Phetoho ea tšohanyetso ea matla a khatello ea pseudo ka mokhoa ona haholo-holo e etsahala ha sekhahla sa ho phunya se kena mobung o bonolo oa mobu le khoune e feta ka sebopeho sa phetoho ea tšohanyetso.Ha boima bo boholo ba sebopeho, matla a pseudo a mangata a matla a ho cheka sebopeho.Etsisa ts'ebetso ea ho cheka ea spiral welded pipe ka sebopeho sa tšohanyetso le ho bolela esale pele phetoho ea mokhoa oa ho phunya oa pompo.