A new cracking resistance index based on fracture mechanics for high strength sheet metal ranking
نویسندگان
چکیده
Abstract Driven by current safety and weight reduction policies in the automotive sector, development of new high strength sheet metal products has experienced unprecedented growth last years. With emergence these materials, challenges related to their limited ductility higher cracking susceptibility have also raised. Accordingly, fracture criteria accounting for material’s resistance become unavoidable. In this work, a index (CRI) based on mechanics is proposed classify crack propagation (i.e. toughness) sheets. The energy obtained from tensile tests with sharp-notched specimens. procedure very fast simple, comparable conventional test, it may be used as routine testing quality control material selection. CRI investigated several advanced steel (AHSS) sheets 0.8-1.6 mm thickness strengths between 800 1800 MPa. results show that suitable rank according can correlated crashworthiness edge resistance.
منابع مشابه
A new brittleness index for estimation of rock fracture toughness
Assessment of the correlation between rock brittleness and rock fracture toughness has been the subject of extensive research works in the recent years. Unfortunately, the brittleness measurement methods have not yet been standardized, and rock fracture toughness cannot be estimated satisfactorily by the proposed indices. In the present study, statistical analyses are performed on some data col...
متن کاملFracture mechanics-based life prediction of a riveted lap joint
In this paper, three-dimensional modeling of the fatigue crack growth profiles was performed in a simple riveted lap joint. Simulation results showed that mode I was dominated on the one side of the plates and the crack straightly grew on this side, while the other side of the plates was in a mixed-mode condition and the crack propagation path was not straight on this side. Afterward, the fract...
متن کاملA mechanics model for sheet-metal stamping using deformable dies
This paper studied the deformation mechanisms of sheet metals stamped by rigid punches and deformable dies. Emphasis was placed on the development of elastic plastic zones in the sheet workpieces, on the functions of the die parameters and on their correlations with spring-back. It was found that the reduction of spring-back was due mainly to the interface interaction offered by the dies. The p...
متن کاملA Proposed Preference Index For Ranking Fuzzy Numbers Based On $alpha$-Optimistic Values
In this paper, we propose a novel method for ranking a set of fuzzy numbers. In this method a preference index is proposed based on $alpha$-optimistic values of a fuzzy number. We propose a new ranking method by adopting a level of credit in the ordering procedure. Then, we investigate some desirable properties of the proposed ranking method.
متن کاملCrack Tip Constraint for Anisotropic Sheet Metal Plate Subjected to Mode-I Fracture
On the ground of manufacturing, sheet metal parts play a key role as they cover about half of the production processes. Sheet metals are commonly obtained from rolling and forming processes which causes misalignment of micro structure resulting obvious anisotropic characteristics and micro cracks. Presence of micro cracks poses serious attention, when stresses at the tip reach to the critical v...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IOP Conference Series: Materials Science and Engineering
سال: 2021
ISSN: ['1757-8981', '1757-899X']
DOI: https://doi.org/10.1088/1757-899x/1157/1/012094