Comparative Assessment of Elastio-Viscoplastic Models for Thermal Stress Analysis of Automotive Powertrain Component Ford Motor Company

Format:

Conference/Event

Author/Creator:

Mao, Mao, author.

Contributor:

Engler-Pinto, Carlos

Su, Xuming

Conference Name:

SAE 2015 World Congress & Exhibition (2015-04-21 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2015

Summary:

AbstractIn this paper, thermal stress analysis for powertrain component is carried out using two in-house developed elasto-viscoplastic models (id est Chaboche model and Sehitoglu model) that are implemented into ABAQUS via its user subroutine UMAT. The model parameters are obtained from isothermal cyclic tests performed on standard samples under various combinations of strain rates and temperatures. Models' validity is verified by comparing to independent non-isothermal tests conducted on similar samples. Both models are applied to the numerical analysis of exhaust manifold subject to temperature cycling as a result of vehicle operation. Due to complexity, only four thermal cycles of heating-up and cooling-down are simulated. Results using the two material models are compared in terms of accuracy and computational efficiency. It is found that the implemented Chaboche model is generally more computationally efficient than Sehitoglu model, though they are almost identical in regard to accuracy. This study provides an insight into the necessary information required for fatigue and durability modeling of automotive engine components operating at elevated temperature

Notes:

Vendor supplied data

Publisher Number:

2015-01-0533

Access Restriction:

Restricted for use by site license