Abstract
Many metal parts in various applications are being replaced by plastic parts. There are several reasons for that depending on actual application - minimize part cost, enhance corrosion resistance, integrating more components into one part etc. Most important steps of metal to plastic conversion are material selection and design of plastic part. Plastic part has to withstand the same load as metal part. To fulfill this requirement fiber reinforced engineering plastics are often used. Also it is convenient to substitute heavy wall sections with ribbed structure to increase load-carrying ability of part and decrease cycle time, eliminate voids, sink marks etc. Mechanical properties of such part could be highly affected by fiber orientation. Results of fiber orientation from injection molding filling analysis can be used in stress analysis for better prediction of part response to mechanical load. Such coupled analysis is performed here in this case study on bolted flange joint.
Highlights
Many metal parts in various applications are being replaced by plastic parts
Assuming fiber reinforced plastic part as isotropic is convenient in preliminary design phase and preliminary stress analysis to find out where are the critical most demanding areas in terms of stress
Preliminary stress analysis was first performed with PA66 GF30, stress levels were high for this material, so PA66 GF50 was selected instead
Summary
Many metal parts in various applications are being replaced by plastic parts. There are several reasons for that depending on actual application — minimize part cost, enhance corrosion resistance, integrating more components into one single part etc. [1,2,3]. Mechanical properties of fiber reinforced part are highly affected by fiber orientation as a result of flow. Injection molding simulation follows after the preliminary stress analysis [4].
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