Abstract
A catalytic converter in the automotive exhaust system, consists of a substrate in the center, a mat outside the substrate and a can outside the mat. Since the substrate is brittle, it is wrapped in mats and press-fitted into a can. If the mat pressure developed during the canning process is excessive, it might cause the fracture of the substrate. A finite element program for finding mat pressures on the substrate in the canning process was developed in Microsoft EXCEL. It is a user-friendly program with easy input and graphical output. By modeling the substrate, the mat and the can as simply as possible, fixing the number of elements and iterations and taking into account only a small part of the output radial distance changes in the current step to calculate the input pressure in the next step, the material nonlinear problem was solved successfully in Microsoft EXCEL. The solutions were compared to ABAQUS solutions and found to be accurate.
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Abbreviations
- \(a,b\) :
-
Semi major- and minor-axis
- \(F_{x} ,F_{y} ,M_{z}\) :
-
Forces and moment on a node
- \(g_{t}\) :
-
Target gap between a substrate and a can
- \(L\) :
-
Length of a beam element
- \(p_{e}\) :
-
Converted mat pressure on a substrate
- \(p_{m}\) :
-
Radial pressure on a mat
- \(X,Y,R\) :
-
Profiles of a mat
- \(r_{1} ,r_{2}\) :
-
Profiles of a substrate
- \(t\) :
-
Can thickness
- \(t_{m}\) :
-
Mat thickness
- \(u,v,\theta_{z}\) :
-
Translation and rotation of a can
- \(\epsilon\) :
-
Nominal radial strain of a mat
- \(\eta\) :
-
Error correction factor
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ABAQUS 6.10 Benchmarks Manual 3.1.5
ABAQUS 6.10 Keywords Reference Manual
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© 2017 Springer Science+Business Media Singapore
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Chu, S.J., Lee, Y.D. (2017). Development of a Finite Element Program for Determining Mat Pressure in the Canning Process of a Catalytic Converter. In: Öchsner, A., Altenbach, H. (eds) Properties and Characterization of Modern Materials . Advanced Structured Materials, vol 33. Springer, Singapore. https://doi.org/10.1007/978-981-10-1602-8_8
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DOI: https://doi.org/10.1007/978-981-10-1602-8_8
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