Vibration Analysis Of BCC Lattice Structure Materials Using Finite Element Method

Nurdin, Muhammad Nasruddin (2019) Vibration Analysis Of BCC Lattice Structure Materials Using Finite Element Method. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Lattice structure has increasing interest amongst researchers due to its vast advantages features such as lightweight properties, high mechanical strength and high energy absorbance. In this report, the effect of strut diameter design parameter of quatrefoil shaped BCC lattice structure on its natural frequency is investigated. The quatrefoil shape BCC lattice structure bar sample with different strut diameter sizes were made by using the fused deposition modelling (FDM) additive manufacturing (AM) technique. The bar sample were subjected to vibration testing with set up consist of fabricated test rig, accelerometer, impact hammer and signal generator/analyzer. Likewise, FEM models using ABAQUS software are also constructed to investigate their natural frequency and deformation numerically. From the vibration testing, the sample with highest strut diameter produced highest natural frequency value due to increased stiffness. It is found that the numerical results are in good agreement with less than 17% error with the experimental results. Using the experimentally validated FEM model the effect of strut diameter to the stiffness of lattice structure are further investigated to support the findings in vibration testing. The stiffness obtained shows similar increasing trend like that of in the vibration testing as the strut diameter size increase. The conclusion that can derived from this study are the size of strut diameter are affected the natural frequency also the stiffness of lattice structure bar sample. Therefore, the information of lattice structure in this study are shows that lattice structure is suitable use in dynamic application

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