Dynamic Analysis of 3D Printed Polylactic Acid Bolted Joint Beams

Sibivivek, K. P. and Pandey, Ashok Kumar (2022) Dynamic Analysis of 3D Printed Polylactic Acid Bolted Joint Beams. In: Virtual Seminar on Applied Mechanics, VSAM 2021, 28 May 2021 through 29 May 2021, Virtual, Online.

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Abstract

This study shows an experimental method and a finite element model for modal analysis of 3D printed Polylactic acid (PLA) bolted joint beams. Three test samples are 3D printed with 20% infill density and tested with scanning head Laser Doppler Vibrometer (LDV) for its natural frequencies and mode shapes. The test specimens are a monolithic beam, a lap joint beam and a reduced Brake Reu β beam. Since the material properties like Young’s modulus and density of 3D printed structures are not exactly known, we develop a parameter estimation method to calculate these values. Using these estimated values, a prestressed nonlinear finite element model is created by taking the effect of friction in contacting interfaces. Ansys software is used to create the finite element models. The natural frequencies and mode shapes from experiment and finite element model match with an error less than 10%. This model and estimated parameters can be used for further studies with 3D printed polylactic acid material and in contacting interface modelling. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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IITH Creators:

IITH Creators	ORCiD
Pandey, Ashok Kumar	https://orcid.org/0000-0002-5878-6451

Item Type:

Conference or Workshop Item (Paper)

Additional Information:

Acknowledgements First author acknowledge the fellowship received from the Ministry of Education, India. The work is also partially supported by AR&DB, India, with project number 1824.

Uncontrolled Keywords:

3D printing; Bolted joint; Modal analysis; Mode shapes; Natural frequency; Nonlinear finite element model; Polylactic acid (PLA)

Subjects:

Physics > Mechanical and aerospace

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

21 Jul 2022 04:18

Last Modified:

21 Jul 2022 04:18