Modeling, Analysis, and Validation of Temperature Dependent Vibration Induced Fretting Corrosion
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Connector reliability is an extremely important factor in electronic packaging, especially with regard to vehicle electronics. Two of the major drivers for fretting corrosion are vibration and thermal cycling. Most previous studies in this area have focused on experimental evaluations of both thermal induced fretting and vibration induced fretting separately; extremely few, if any, have combined the two. In recent years, previous studies have focused on the development and analysis of such models for vibration driven fretting corrosion. The present study extends this work into the thermally-driven fretting and the effects of vibration at different temperatures. This was accomplished by utilizing sources that have documented experimental work on temperature dependent materials, and by conducting experiments to find the temperature dependent static friction coefficient as well, and entering the temperature dependent material properties into the ABAQUSTM model. The experiment conducted to determine the temperature dependent static friction coefficient used an automated inclined plane (based on Newton’s Second Law). The apparatus was first utilized to test how pressure affects the static friction coefficient at room temperature. The experimental data obtained from that experiment was then compared to analytical data from the literature. Both the experimental data and the analytical data were compatible and showed that as the mass increases the static friction coefficient decreases. The apparatus was then placed in a temperature chamber and data was collected to see the effect of temperature on the static friction coefficient. Using several masses, it was found that as the temperature increased the static friction coefficient decreased, as expected. Using ABAQUSTM, two models were developed for a single blade-receptacle connector pair and the resulting models were analyzed for fretting behavior. One model was developed to analyze how thermal cycling induces fretting corrosion. Temperature dependent properties were used for the Static Friction Coefficient, Young’s Modulus, Thermal Conductivity, Thermal Expansion, and Heat Transfer Coefficient. The results from this model showed that as the frequency of the temperature change increases the larger the temperature needed to induce fretting corrosion. The second model analyzed how temperature affected vibration induced fretting, and three temperatures were analyzed. The effect of temperature on the vibration induced fretting corrosion could not be observed, but that could be due to the small range of temperature change.
- Ibrahim, Rebecca David May, 2010_Final.pdf