Analytical And Numerical Modelling Of Failure In Aluminum Matrix Composite For Connecting Rod Application

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The failures in composites are due to failure in their matrix, re-enforcement parts, or both. Failurernin the composite structure could cause pin failure, stress failure, fatigue failure, hydro lock as wellrnas overheating of the connecting rod. Thus, the implementation of analysis and predicting tools isrnpreferred to prevent failures. The objective of this thesis work is to predict and analyze the failurernpossibilities in automobile connecting rods. The connecting rods are made of an aluminum matrixrnwith silicon carbide reinforcements which were modeled by varying the volume fraction of reenforcementsrninrnthernformrnofrnlaminatesrnandrnparticulates.rnThernlaminaternreinforcedrnaluminumrnmatrixrnrncompositesrnwerernrnmodeled by varying laminate orientation while the particulate reinforced onesrnwere modeled by varying the composite aspect ratio. The connecting rod models passed throughrnavailable failure criteria like Tsai-Hill or Tsai-Wu and Von-Mises stress values. Both models werernanalyzed using ABAQUS software. Additionally, the particulate reinforced composites werernanalyzed using representative volume element /RVE/ on DIGIMAT software. The results showedrnthat the material properties of AA6061-SiC composites increased with an increasingrnreinforcement volume fraction by the reduction in thickness of the bulky connecting rod. Failurernin the connecting rod was predicted to occur in stress-concentrated areas located at corners wherernthe SiC reinforcements are found, as well as, areas of load application and the middle crosssectionrnofrnthernconnectingrnrod.rnThernparticulaternreinforcedrnmodelsrnwerernpreferredrnthanrnthernlaminaternrnreinforcedrnonesrnbecauserntheyrnsustainedrnhigherrnloadrngradientsrnpronerntornlessrnfailure.rnThernaluminumrnrnMMC’Srnrnwith a five percent SiC reinforcement volume fraction in particulate form, as well as,rntwenty percent volume fraction SiC in laminate form with 0rnii rnorn or 90rnorn orientation were found suitablernfor automobile connecting rod application based on the parameters provided by the author.

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Analytical And Numerical Modelling Of Failure In Aluminum Matrix Composite For Connecting Rod Application

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