A novel video opto-mechanical (VOM) device for studying the effect of stretching speed on the optical and structural properties of fibers

On line interferometric investigation of the neck propagation phenomena of stretched polypropylene fibre

“…Sokkar et al [5] designed a Video Opto-Mechanical device (VOM) in order to determine dynamically the mechanical, optical and structural properties of fibres at different uniform stretching speeds. The (VOM) device attached with multiple-beam interferometric system is an accurate and an efficient technique in the field of interferometery and monitoring of fibres.…”

“…They detected two mechanisms of deformation, one of them is the smooth deformation and the other is necking deformation which is detected when the PP fibre is stretched with fast drawing. Sokkar et al [5] designed a Video Opto-Mechanical (VOM) device to characterize the online drawing process and also correlating the optical properties with the speed of drawing. They detect the threshold speed to avoid necking occurrence.…”

Some Structural Properties of Dynamically Drawn iPP Fibers

“…The obtained video film was cut into separate images to deal with each frame separately. The draw ratio calculated using the VOM calibration curve [14]. The images of the cut frames were enhanced and the noises were removed by using Fourier transform method.…”

“…To throw light on the effect of strain rate on the different structural properties of iPP fibers a mechanical device attached with multiple beam interference technique in transmission can be used [14].…”

“…Interferometric techniques are highly accurate techniques for measuring the optical properties of fibers [13]. Online Video Opto Mechanical device (VOM) [14] was designed to determine the mechanical, optical and structural properties of fibers at different strain rates. Sokkar et al, measured the different optical properties of iPP fibers during the dynamic cold drawing process [15].…”