Detecting materials properties by vibration technique

Abstract

This project is made to study about detecting materials structure through vibration technique. Apart from that, different test is carried out to define the mechanical properties of material. Two types of material are used in this project which is Aluminum and Mild Steel and each of materials has two different thicknesses. Thickness for Aluminum is 0.5 and 1.0mm while Mild Steel is 1.0 and 1.2mm. For this research, it consists of two testing in order to define material structure and mechanical properties of material. The testing is destructive and nondestructive test. Destructive test is made to define the mechanical properties of materials such as ultimate stress (σu), fracture stress (σf) and yield stress (σy). In destructive testing, tests are carried out to the specimen's failure, in order to understand a specimen's structural performance or material behavior under different loads. For non-destructive test, it usually provides a more reliable assessment of the state of the test object. Destruction of the test object usually makes this type of test more costly to the test object's owner than non-destructive testing. Modal Analysis has been choosed as non-destructive test in order to study material structure which is natural frequency (ωn). This project is successful in predicting the materials properties via vibration technique.