Kwon, Ilyoung Chun, Byoungjin Chun, Myung-Suk Jung, Hyun Wook Hyun, Jae Chun 2024-01-20T02:30:28Z 2024-01-20T02:30:28Z 2021-09-01 2017-02 1226-119X https://pubs.kist.re.kr/handle/201004/123144 The sensitivity of two-dimensional (2-D) film casting processes for viscoelastic fluids is investigated using a transfer function approach based on the transient frequency response method. The transient responses of state variables to step-changed film tension have been conveniently changed into corresponding transfer functions via the Laplace transform in a tension-controlled system. The transfer function between take-up velocity and film tension plays a key role in elucidating both sensitivity and the stability of film drawing systems. Various amplitude ratios of state variables are effectively evaluated over a wide range of frequencies when an ongoing disturbance is imposed at take-up velocity. The aspect ratio (up to 1 in this study) tends to make the system less sensitive to disturbances. The effect of viscoelasticity on the sensitivity is related to stability patterns, which depend on the aspect ratio and Deborah number. English KOREAN SOC RHEOLOGY SPINNING PROCESS STABILITY Sensitivity analysis of two-dimensional viscoelastic film casting processes using transfer functions by transient frequency response method Article 10.1007/s13367-017-0008-0 1 KOREA-AUSTRALIA RHEOLOGY JOURNAL, v.29, no.1, pp.67 - 73 KOREA-AUSTRALIA RHEOLOGY JOURNAL 29 1 67 73 scie scopus kci ART002196891 000395003400008 2-s2.0-85014269025 Mechanics Polymer Science Mechanics Polymer Science Article SPINNING PROCESS STABILITY viscoelastic film casting sensitivity frequency response constant tension transfer function aspect ratio