Abstract: Excavators are intended for excavating rocks and soils. It consists of four link members: the bucket, the stick, the boom and the revolving super structure (upper carriage). Excavator arm is one of the most important attachments of an excavator. The excavators arm has to work reliable under many different working conditions with high amount of load. Hence it is required to design an equipment which has maximum reliability and minimum weight, maintaining all the factors of safety under all working and loading conditions. The excavator mechanism must work reliably under unpredictable working conditions. Thus, it is very much necessary for the designers to provide not only an equipment of maximum reliability but also of minimum weight and cost, keeping design safe under all loading conditions. The aim is to design and develop an excavator which will be focused on the rigid and flexible arm-boom-bucket linkage called "Design and Development of Excavator Arm using FEM Analysis ". A detailed inspection has been carried out by finite element analysis (FEA) using the ANSYS software to observe and examine the stress developed in the arm for all design considerations. At the end, the stress developed due to working load for every single design has been observed and examined to check whether they are safe or not. The results of this research and observation are that the weight of the excavator arm can be modified by making some sort of design and material changes, keeping the all Factor of Safety as they were. Excavators are earth moving equipment and the main component to get the work done is its function is arm, which directly affect the working performance and reliability of the excavator. However, using the finite element analysis (FEA) method for Design and structural analysis of the excavator arm is required and mandatory for the structural design of the arm.

Keywords: Excavators, Excavator arm, unpredictable working conditions, FEM Analysis, ANSYS software, safe limit

| DOI: 10.17148/IARJSET.2021.8642