Fracture Prediction for Mild Steel Sheet and High-Strength Steel Sheet Subjected to Draw Bending Using Forming Limit Stress Criterion

Design of a Tribo-Simulator for Investigation of the Tribological Behavior of Stainless-Steel Sheets Under Different Contact Conditions

“…In the last decades, the 90° bend test or draw-bend formability test has gained great prominence in the tribological studies of SMF processes. Owing to the dual displacement control of the grips on some equipment, it is possible to perform more than one formability test, such as the BUT test, STT, draw-bend springback (DBS) test, and draw-bend fracture (DBF) test [13][14][15][16][17][18][19][20][21][22][23][24][25][26] . This type of tribo-simulator can simulate the contact conditions present in the region of the die radius and punch of deep drawing processes with good accuracy; therefore, the results can be used as input data in numerical simulation software to improve the pre-production accuracy of the pieces, and consequently, improve productivity and product quality.…”

On the Use of Strain Path Independent Metrics and Critical Distance Rule for Predicting Failure of AA7075-O Stretch-Bend Sheets

“…In this regard, different stress-based metrics, which need to assume a constitutive model of the material, i.e., plastic flow curve, yield criterion, and hardening model, have demonstrated to be less sensitive to strain path history than the strain-based FLC. Particularly, from its conceptualization by Arrieux [ 32 , 33 ] and Stoughton [ 34 ], the forming limit stress curve (FLSC) within the principal stress space, has been extensively investigated in the last few years [ 35 , 36 , 37 , 38 , 39 ]. Panich et al [ 37 ] derived the fracture forming limit stress curves (FFLSC), by using Hill’48 and Yld’89 plasticity models, from the strain-based fracture forming limit curve (FFLC) obtained by using the Nakazima test over an advanced high strength steel grade 980.…”