News & Events

May 25th, 2021
ASTM International 05th Symposium on: "Evaluation of Existing and New Sensor Technologies for Fatigue, Fracture and Mechanical Testing"

FADI-AMT participated in the ASTM International Symposium with a presentation titled: Anti-Buckling Device Coupled with Real-Time DIC for Complex Cyclic Testing of Lightweight Materials (Springback Prediction)"

This work tries to shed some light on the topic of accurate mechanical testing for Springback Prediction by introducing a new anti-buckling device that is particularly designed to enable accurate and repeatable compression and cyclic testing. The device is designed to address the limitations of other approaches and devices presented in the literature, and features control and monitoring of side forces, self-centering, and the ability to achieve large plastic compressive strains. More importantly, digital image correlation (DIC) is integrated with the anti-buckling device and testing load frame to provide accurate strain measurements.

In this study, DIC was used in a real-time mode to facilitate accurate load reversal during cyclic testing. For validation, the presented setup was used for testing two selected materials with practical applications in the automotive body sector: 6016-T4 aluminum and DP980 steel sheets. The results demonstrate how the developed setup and the integration with real-time DIC provide a robust and reliable means for generating high-quality curves for the different tests needed for the calibration of springback models.