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Fused Deposition Modelling (FDM) is one of the popular AM technique which utilizes thin thermoplastic filaments to create prototypes and end use products. The parts processed through FDM method have poor mechanical properties and surface quality characteristics in comparison to conventional manufactured products. Extensive research is underway in various parts of the world to bring an enhancement in mechanical properties and other related characteristics of the parts produced through FDM for making the process highly suitable to produce parts for diverse applications. The present work considers slice height, infill density, shell thickness and raster angle varied din three levels (34) to study their effects over output responses such as specimen weight, flexural strain and flexural strength. Taguchi’s L9 orthogonal array is considered for preparing the experimental plan. Flexural testing is adopted for the evaluation of flexural strength. Grey Relational Analysis and Technique of Order Preference Similarity to the Ideal Solution methods have been adopted for multi response optimization of FDM parameters and the optimized parameter setting recommended have been validated through confirmation trials. The confirmation trail conducted has revealed that the setting recommended by TOPSIS A1B3C3D1 has shown higher flexural strength and slice height is found to be most significant factor. GRA method has recommended the combination A3B3C3D1 which shows lesser flexural strain and infill density is found to be significant from all the parameters considered.

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Fatigue analysis and Optimization of connecting rod are the modern trend in automotive engineering industry emphasis on many parameters like total deformation, life, factor of safety, stress biaxiality and fatigue sensitivity. The main scope of this work comprises detailed review on various methods and procedures adopted by different researchers in Fatigue analysis of commercially used Engine Connecting rod. The objective of conducting fatigue analysis varies from each other like Weight reduction, Cost reduction, Shape optimization and fatigue life calculation at varying boundary conditions and loads. Fatigue analysis has a very dominant position in product design and development as more than 50% of the products, structural failures are due to fatigue concept only. The review have emphasized the importance of conducting the fatigue analysis of the connecting rod to identity its critical points, fatigue life and factor of safety etc., for its better performance and life period extension.