Flexible Forming Exercises

Pagina 1

Fexisle frningexercises FlexibleForming Outerdiameter OD mm ODdintttoIEniter Initialtubethickness to mm Initialtubelength ti mm LiLgdax Finaltubethickness tg mm tgto1tht Finaldesiredtubelength Lf mm Instantaneousthickness ti mm tito1theinfittthEus Maximumallowablethinning9hg th thytojti Axialstress of MPa Hoopstress E MPa Radialstrass 53 MPa stressratio α α E Plasticitycoefficient K MPa Hardeningexponent n Strainatyielding Eo Plasticstrain E Elasticlaw FEEt where EtlaI Strainhardeninglaw o Kikote or 05KE 2Tum.to Bulgingpressure bulg MPa Pbull ODto1 x2 Ifplanestrainconditionnormally atthecenterofthetube biaxialdeformation hoopandradialone È 0 TysKEo Pbulgmax Trm 0 1022 T Iffreebulgingnormally atthetubeends nofrictionthematerialissliding 520 αD 6 TysKEo Pbulgmin 2 Trm 0 Calibrationpressure Peal MPa t.vePeal T.ttRmin REc.ve Peal RT with T KEE Projectionofthecrossing m sectionontheseparationplane P ApLgOD Closingforceofthedie Fc N E PealAp SealingforceY Fsealing N Fsealing PiIdo Frictionforce Fgriction N Fgriction MPiIdolos Formingforce Fforming N Fforming FaxFsealingFgriction INUARY2024