Hybrid Experimental-numerical Determination of the Loading Path to Fracture in TRIP780 Sheets Subjected to Multi-axial Loading
Author | : Matthieu Dunand |
Publisher | : |
Total Pages | : 116 |
Release | : 2010 |
ISBN-10 | : OCLC:650342011 |
ISBN-13 | : |
Rating | : 4/5 (11 Downloads) |
Book excerpt: (Cont.) A first series of fracture experiments is carried out on three types of full-thickness fracture specimens. This experimental program characterizes the onset of fracture for stress states between uniaxial tension and equi-biaxial tension. An effort is made to quantify and minimize the errors affecting the hybrid experimental-numerical analysis of those experiments. Inaccuracies affecting the stress triaxiality and plastic strain histories to fracture are evaluated by comparing surface strains measured by Digital Image Correlation (DIC) and computed by Finite Element Analysis (FEA). A second series of fracture experiments is carried out on a newly designed butterfly-shaped specimen, which allows for multi-axial testing under combinations of normal and tangential loads. Experiments for four different loading conditions are performed and used to analyze the onset of fracture for stress states ranging from pure shear to transverse plane strain tension.