In this paper, an effective method using the concept of virtual boundary is incorporated into the drop/impact simulation. Drop/impact-induced damage is one of the most predominant modes of failure electronic devices suffer in their usage. Drop/impact performance testing is usually conducted to investigate and understand the detailed impact behavior and damage mechanism of the product. This assessment can be performed through a computer simulation. The finite element method (FEM) is one of such techniques to achieve solutions within reasonable computational time and cost. However, in the large-scale packaged electronic devices model, the packaging components outside the electronic devices sometime incur too much CPU time in a drop–impact simulation, and thus a long computational time. Especially the cushion buffers that protect the electronic devices usually have very complex shapes and they are often meshed as solid elements by the FEM software. This causes a large demand for CPU time for the model involving the cushion buffers. With the proposed virtual boundary method, the boundary field, which only accounts for about 10% of original CPU time, will replace those external components. Accordingly, the substantial CPU time on those components and elements will be saved, and designers can obtain the simulation results of electronic components in a much shorter time. In this study, the reliability and advantage of the virtual boundary method are illustrated through the analysis of a TV model. The application of the method to an electronic component, a printed circuit board in the TV model, is also briefly discussed.
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Jan 1, 2009
Toru Kitamura + 1
Open Access
