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Product development with FEM in Ansys
Stiffness analysis of corrugated tubes

Simulation detects weak points at an early stage

Sector: Automotive (motor vehicles/trucks)Specialist field: System simulation

CADFEM supports automotive supplier Schlemmer in the development of corrugated tubes with FEM in Ansys to determine the deformation behavior in advance of prototype production.

Summary

Task

For the development of corrugated tubes, the deformation behavior under mechanical load is of crucial importance. Simple practical tests, such as compression tests or elongation tests, make it easy to analyze the stiffness behavior with respect to typical loading scenarios.

Solution

Based on the CAD part models provided by the customer, a symmetrical FEM model was created. Using measured elastic-plastic material curves, it was also possible to represent the material behavior beyond the linear range.

Customer benefits

Parameterized variant studies yielded valuable results that provided helpful information for continuous optimization of the corrugated tube design.

Project Details

Task

For the development of corrugated tubes, the deformation behavior under mechanical load is of crucial importance. Simple practical tests, such as compression tests or elongation tests, make it easy to analyze the stiffness behavior with respect to typical loading scenarios. With the aid of the Finite Element Method (FEM), weak points in the design can be identified in advance of prototype production. CADFEM was commissioned by Schlemmer GmbH to demonstrate the possibilities of the FEM software system ANSYS for the development of corrugated tubes.


Customer Benefit

The behavior of the corrugated tubes could be well represented, but it shows a certain sensitivity with regard to the material parameters and measurement conditions. The parameterized variant studies achieved valuable results which provided helpful information for a continuous optimization of the corrugated tube design.


Solution

Based on the CAD part models provided by the customer, a symmetrical FEM model was created. Using measured elastic-plastic material curves, it was also possible to represent the material behavior beyond the linear range. The implementation of several typical test scenarios is shown in the figures. The nonlinear material behavior at hand and the relatively large deformations to be expected required a nonlinear calculation. Buckling of the corrugated tube could also be simulated with this.

Images: © Schlemmer


Head of Business Development

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