Evaluation of Strain Rate-Sensitive Constitutive Models for Simulation of Servo Stamping: Part 1 Theory University of Michigan

Format:

Book

Conference/Event

Author/Creator:

Wen, Weiling, author.

Contributor:

De Zhao, Arthur

Zou, Yu

Conference Name:

Automotive Technical Papers (2020-01-01 : Warrendale, Pennsylvania, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2020

Summary:

Strain-rate sensitivity has been neglected in the simulation of the traditional stamping process because the strain rate typically does not significantly impact the forming behavior of sheet metals in such a quasi-static process, and traditional crank or link mechanical presses lack the flexibility of slide motion. However, the recent application of servo drive presses in stamping manifests improvement in formability and reduction of springback, besides increased productivity and energy savings. An accurate simulation of servo stamping entails constitutive models with strain-rate sensitivity. This study evaluated a few strain rate-sensitive models including the power-law model, the linear power-law model, the Johnson-Cook model, and the Cowper-Symonds model through the exercise of fitting these models to the experimental data of a deep draw quality (DDQ) steel. Curve fitting over segmented strain ranges and grouped strain rates were conducted so that the uniqueness of the identified parameters of each model could be analyzed. The findings of each model's suitability to be used in finite element software herein can help users select the appropriate constitutive models for simulation of servo stamping

Notes:

Vendor supplied data

Publisher Number:

2020-01-5073

Access Restriction:

Restricted for use by site license