柴油机曲轴的外文

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5000字数以内的外文适合作文毕业设计的外文翻译。
1. Introduction
A comparative evaluation of fatigue assessment techniques on a forged steel crankshaft of a single cylinder diesel engine
has been made by using fracture mechanics approach viz. linear elastic fracture mechanics (LEFM) and recently developed
critical distance approach (CDA). This paper describes the mathematical modelling of crankshaft geometry for dynamic
analysis using analytical and finite element method (FEM) to estimate the stress concentration regions to predict the
probable location of the crack generation. Different crack lengths have been considered for the further life prediction for the
failure to occur. The crankshaft being used is consisting of two web sections and one crankpin. In automotive industry，
crankshaft analysis on single cylinder is done irrespective of size of crankshaft. Hence this study can be used for any
number of cylinder crankshafts. This study also describes the accuracy of the model and explains the simplifications that
were made to obtain an efficient FE model. Different mesh quality models and its convergence are compared to finalize on
FE model to be used for the analysis. Identification of appropriate boundary conditions and loadings are also discussed and
subsequent results of finite element analysis have been presented. The prediction of crack growth， time required for failure
and other parameters essential in life assessment have been compared by both the methods. The stress values required for
both the methods are estimated using Finite Element Analysis.