Development of Expert System for Four Bar Mechanism

In this study, an expert system was developed for a quadricycle four bar mechanism with control of transmission angle. Different types of available synthesis methods are studied and the suitable synthesis procedure is selected for developing the expert system

Kinematic Synthesis and Analysis of Four Bar Mechanism Using Expert System

A considerable amount of research has been carried out on the synthesis of mechanisms with linkages. Such mechanisms can be used in many ways and in general, synthesis is carried out with reference to input positions and output positions. In this study, the expert system analyzes the four bar double rocker mechanism for given set of inputs which includes the distance of the ground pivots depending upon the space constraint for the mounting of the mechanism, the angles of swing of the input link and the angle of swing required by the output link. The results of the kinematic synthesis and analysis module of the expert system have been compared using a standard problem

Handlebar hernia: A rare case of post-traumatic anterior abdominal wall hernia

Abstract Handlebar hernias are abdominal wall hernias resulting from direct trauma to the anterior abdominal wall and also called as Traumatic abdominal wall hernias (TAWHs). They usually occur at weak anatomic locations of the abdominal wall .The associated intra-abdominal injuries are infrequent. . Such traumatic hernias are rare. We report this case of a handlebar hernia resulting from an injury sustained by bicycle handle with a history of fall, and discuss the management of such injuries

Uretero-appendicular fistula

We present a case of uretero-appendicular fistula. A 30-year-old woman with fever and lower abdominal pain since 3 months was being investigated. Ultrasound abdomen showed appendicitis with connection between appendix and ureter. Appendicectomy with segmental ureterectomy and end to end ureteral anastomosis was carried out

Design, Simulation and Experimental Investigation of 3D Printed Mechanical Metamaterials

Mechanical metamaterials have generated special interest recently due to their tailorable structure, exceptional mechanical properties, and advancements in 3D printing processes that allow the fabrication of intricately structured components. Designing innovative structures of metamaterials will lead to the development of advanced materials with special properties. The experimental investigation presented in this paper involves the design, simulation, fabrication, and testing of three different mechanical metamaterial models i.e. Chiral, Re-entrant, and Hybrid printed in acrylonitrile styrene acrylate (ASA) using fused deposition modeling (FDM). Subsequently, a uniaxial compression test and ex-situ characterization was performed for studying the mechanical properties, the types of fracture and crack propagation of the printed metamaterial models which may lead to the development of metamaterials with tunable compressive/bending stiffness.Mechanical Engineerin