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Full-Text Articles in Social and Behavioral Sciences
Young's Modulus Measurement Using Fibre-Coupled Self-Mixing Laser Diode, Ke Lin, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong, Hui Jun Li
Young's Modulus Measurement Using Fibre-Coupled Self-Mixing Laser Diode, Ke Lin, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong, Hui Jun Li
Faculty of Engineering and Information Sciences - Papers: Part A
A new fibre-coupled self-mixing laser diode is developed for measurement of Young's modulus. Instead of transmission in free space, the light path is coupled in a fibre, which enables the measuring system easily and feasibly to be installed in many application cases. A specimen made of aluminium alloy 6061 is tested by the system designed. The obtained value of Young's modulus is 70.02 GPa with 0.16% measurement accuracy, showing a high repeatability and a good agreement with the standard values reported in literatures.
Measuring Young's Modulus Using A Self-Mixing Laser Diode, Ke Lin, Yanguang Yu, Jiangtao Xi, Yuanlong Fan, Huijun Li
Measuring Young's Modulus Using A Self-Mixing Laser Diode, Ke Lin, Yanguang Yu, Jiangtao Xi, Yuanlong Fan, Huijun Li
Faculty of Engineering and Information Sciences - Papers: Part A
This paper presents a novel approach for determining the Young’s modulus by using a self-mixing laser diode (SMLD). An SMLD system consists of a laser diode (LD), a microlens and an external target. With a small portion of light backscatterd or reflected by the target re-entering the LD inside cavity, both the amplitude and frequency of the LD power are modulated. This modulated LD power is referred as a self-mixing signal (SMS) which is detected by the photodiode (PD) packaged in the rear of the LD. The external target is the tested sample which is in damping vibration excited by …
System Implementation Of Self-Mixing Interferometry Technique-Based Measurement On Young's Modulus, Ke Lin, Yanguang Yu, Zhenghao Liu, Jiangtao Xi, Huijun Li, Cuiling Liu
System Implementation Of Self-Mixing Interferometry Technique-Based Measurement On Young's Modulus, Ke Lin, Yanguang Yu, Zhenghao Liu, Jiangtao Xi, Huijun Li, Cuiling Liu
Faculty of Engineering and Information Sciences - Papers: Part A
Young's modulus (denoted by E) is an intrinsic and valuable quantity for appropriate estimation of material performance. E can be obtained from the resonant frequency from the vibration of the tested material sample excited by the external forces. In this paper, we present a system design for determining the parameter by using an optical feedback self-mixing interferometry (OFSMI) system. An OFSMI system consists of a laser diode (LD), a micro-lens and an external target. The material sample to be tested is used as the external target. The vibration of the sample causes the variation of the length of the external …