Abstract
Plastic deformation is the most common technique adopted to manufacture complex shape pieces in the most efficient way. Even higher requirements need to be faced in the different applications. In order to target such requirement quality and compliance tests are carried out aimed to guarantee that these standards are faced; this often means a waste of material and economic resources. A far as concerns welded stainless steel pipes many criticises affecting the general trend of subsequent machining need to be considered. In this paper, the effects of different process parameters and geometrical constrain on austenitic stainless steel pipe forming are studied by Finite Elements Method (FEM) simulations. The model sensitivity to input parameters is reported. The feasibility of the simulated process is evaluated through the use of Forming Limit Diagrams (FLD).
Highlights
1 Introduction Stainless steels are today quite appealing materials both for scientific and commercial matters, based on to their excellent strength/ductility combination coupled to corrosion resistance [1,2,3,4,5,6]
Plastic processing of stainless steel pipes is characterized by a poor behavior homogeneity [10]
A commercial software package was adopted for numerical calculation. Such software allows adopting the Hill 48' yield function [19,20]. Such a function is known to be ideal for small-sized tubular geometries [12] as a constitutive equation for stainless steels behaviour taking into account the following parameters in order to simulate the bending process:
Summary
Stainless steels are today quite appealing materials both for scientific and commercial matters, based on to their excellent strength/ductility combination coupled to corrosion resistance [1,2,3,4,5,6]. Plastic processing of stainless steel pipes is characterized by a poor behavior homogeneity [10]. Such works are aimed to predict the behavior of various shapes in different processing areas, such as hydroforming and bending, or cold metal forming of steel sheets.
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