Abstract
Every structure that assembled with the joints has a significant effect on the dynamic behaviour of the structure. Therefore, the overall dynamic behaviour of the jointed structure highly relies on these joints. Finite element method (FEM) is commonly used to model an element connector for the jointed structure due to its because every jointed structure has its owns joint properties. The aims of this research are to identify the potential element connectors that are available in commercial finite element analysis package in order to represent the joints for spot welds and adhesive joints. The reliability of potential connector elements are quantified by comparing the predicted result calculated from commercial finite element analysis package with the experimental result that obtained from the LMS Scadas. The model of element connectors have been constructed based on three types of the case studies. The comparison reveals that the combination of Type 2 (ACM2) and Type 3 (CWELD) have shown a better capability to represent the joints of the complex jointed structure.
Highlights
The complex jointed structure, such as car hood are assembled by an arrangement of various sizes of metal sheets and they are joined by a thousand number spot welds and adhesives
In this complex jointed structure, the results are shown based on three types of the case study
The potential element connectors that are available in the commercial finite element analysis to represent the joints for spot welds and adhesive joints were identified
Summary
The complex jointed structure, such as car hood are assembled by an arrangement of various sizes of metal sheets and they are joined by a thousand number spot welds and adhesives. Spot welds are recognised as resistance spot welding (RSW) is a preferable choice for joining method the car hood due to its simple fabrication process. The modern adhesive have been used in automotive industry to reduce the number of spot welds or combined these two joints for assembling the car hood. Imperfections in assembled and jointed the structure can cause variations in dynamic characteristics, for examples, mode shapes and natural frequencies of the car hood. The reliability and the dynamic characteristics of the jointed structure greatly relies on these joints [1], [2]. Research has demonstrated that the huge discrepancies between finite element analysis and experimental results because of the invalid assumption on modelling the joints in the finite element [3]
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