Elastic-Plastic Behaviour of Ultrasonic Assisted Compression of Polyvinyl Chloride (PVC) Foam

3rd International Conference on Science, Technology, and Interdisciplinary Research

自然科学;工业技术

Muhalim, N.A.D.^1 ; Hassan, M.Z.^1 ; Daud, Y.^1

UTM Razak School of Engineering and Advanced Technology, Universiti Teknologi Malaysia, Kuala Lumpur

54100, Malaysia^1

关键词: Closed cell foams;    Elastic-plastic behaviour;    Longitudinal modes;    Oscillation amplitude;    Polyvinyl chloride (PVC);    Quasi-static tests;    Ultrasonic vibration;    Universal testing machines;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/344/1/012009/pdf
DOI  :  10.1088/1757-899X/344/1/012009

来源: IOP

【 摘 要 】

The present study aims to investigate the elastic-plastic behaviour of ultrasonic assisted compression of PVC closed-cell foam. A series of static and ultrasonic compression test of PVC closed-cell foam were conducted at a constant cross head speed of 30 mm/min on dry surface condition. For quasi-static test, specimen was compressed between two rigid platens using universal testing machine. In order to evaluate the specimen behavior under ultrasonic condition, specimen was placed between a specifically design double-slotted block horn and rigid platen. The horn was designed and fabricated prior to the test as a medium to transmit the ultrasonic vibration from the ultrasonic transducer to the working specimen. It was tuned to a frequency of 19.89 kHz in longitudinal mode and provided an average oscillation amplitude at 6 μm on the uppermost surface. Following, the characteristics of stress-strain curves for quasi-static and ultrasonic compression tests were analyzed. It was found that the compressive stress was significantly reduced at the onset of superimposed ultrasonic vibration during plastic deformation.