Citation

Kok, Chee Kuang and Tay, Hui Ling and Lim, Boon Kian and Liew, Kia Wai and Samylingam, Lingenthiran and Ooi, Chin Chin (2024) Modeling the Dynamic Responses of Industrial Printed Circuit Board. In: 2024 Multimedia University Engineering Conference (MECON), 23-25 July 2024, Cyberjaya, Malaysia.

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Abstract

Industrial printed circuit boards (PCB) can be difficult to model mechanically due to their inherent material non-homogeneity. In this work, the dynamic responses of PCB were predicted using three micromechanics models implemented via the finite element method. The models, namely Cox-Krenchel, Pan, and modified Cox Lamina models, were developed using a homogenization scheme that accounted for the elastic mechanical properties of the constituent elements of the PCB. Previous work shows the feasibility of these models under static loading. To show their feasibility under dynamic loadings, an experimental modal analysis using the roving impact hammer method and device-level drop tests at three different impact orientations were performed to simulate the dynamic responses of the PCB. The strain gages mounted along the longitudinal and lateral directions of the PCB at selected locations were used to collect the impact strain signals in both tests. Modal frequencies extracted from the frequency response functions of the roving impact hammer method matched closely with those extracted from the finite element modal analyses of the micromechanics models to within 17% error. Drop test results were also compared to predictions, and the trends of strain signals from the experiments and models agreed well. The magnitudes of the simulated strains, however, were roughly two to five times greater than those in the experiments. This could be due to the perfect constraints and perfectly rigid flooring employed in the simulations. The study shows that the micromechanics models were good approximations of the PCB mechanical structure under dynamic loadings.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Finite element
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA329-348 Engineering mathematics. Engineering analysis
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	12 Feb 2025 01:09
Last Modified:	12 Feb 2025 01:09
URII:	http://shdl.mmu.edu.my/id/eprint/13417

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