High-Accuracy Press-Forming Fracture Evaluation/Prediction Using 3D-FLD

Press-formingFracture prediction accuracyUltra high strength steel (UHSS)Development periodDegree of freedom in part design

Data Science

High-Accuracy Press-Forming Fracture Evaluation/Prediction System Using 3D-FLD

Possible to predict press-forming fracture, which was difficult with the conventional Forming Limit Diagram (FLD)

Solution Point

Features 01

Expected Problems

Don't you have the following problems in press-forming fracture evaluations using conventional FLD?

?Not suitable for UHSS, which have a high risk of fracture.

?Can't shorten the die tuning period because of the large number of trial dies required due to poor fracture prediction accuracy.

?Impossible to design parts that make full use of the ductility potential of the material applied.

Features 02

Technology highlight

?Poor fracture prediction accuracy by conventional 2D-FLD based on the minimum principal strain and maximum principal strain as indexes (Fig. 1, 2).

?Focused on the effects of the contact surface pressure between the tool and blank and the strain path with FLD tests on prediction accuracy.

?Improved fracture prediction accuracy by use of a 3D-FLD based on the contact surface pressure, strain ratio and equivalent plastic strain (Fig. 3).

Features 03

Proposed Solutions (Examples)

Fracture prediction of structural members applying UHSS.

Links 01