Experimentation of mode shape curvature algorithm using accelerometer for damage detection in aluminium 6061

Afandi, Muhammad Akif Irfan (2019) Experimentation of mode shape curvature algorithm using accelerometer for damage detection in aluminium 6061. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Structure Health Monitoring (SHM) has been applied in various applications such as aerospace, machinery and civil structures to maintain structure’s safety and integrity. The objective of this experiment is to detect damage in specimen with single 150 mm notch and specimen with double 150 mm notch and to conduct experiment on undamaged and damaged specimen using excitation method (impact hammer) meanwhile the scope of this experiment is to use aluminium 6061 as experiment material, fabricate the material using CNC machine and conduct experiment using excitation method (impact hammer) and accelerometer (piezoelectric sensor) to detect damage on undamaged and damaged specimen. Vibration testing method include mode studies, resonance studies and excitation method meanwhile for damage detection natural frequency, damping ratio and gapped smoothing method has been use. The mode shape will be analysis using finite element, laplace transform, robust regression and cubic polynomial. The methodology of this experiment start from gathering the information, material selection and design, fabrication, vibration test and result obtain. The material was fabricated using CNC machine and the vibration test used roving hammer method.

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