scholarly journals Micro Cup Drawing without Wrinkles Using a Bulged Punch

2021 ◽  
Vol 25 (12) ◽  
pp. 51-62
Author(s):  
Syamsul Hadi ◽  
Anh Kiet Tieu ◽  
Cheng Lu ◽  
Hailiang Yu ◽  
Alain Kusmoko ◽  
...  
Keyword(s):  
Cup Drawing

scholarly journals Influence of the orthotropic behaviour on defects prediction in cup drawing, reverse redrawing and expansion

2021 ◽  
Vol 1157 (1) ◽  
pp. 012072
Author(s):  
M C Oliveira ◽  
D M Neto ◽  
J L Alves ◽  
L F Menezes
Keyword(s):  
Cup Drawing

Formability Analysis of Fukui Stretch-Drawing and Square Cup Drawing Using Strain and Stress Based Forming Limit Curves

2017 ◽  
Vol 751 ◽  
pp. 167-172 ◽  
Author(s):  
Sansot Panich ◽  
Nopparat Seemuang ◽  
Taratip Chaimongkon
Keyword(s):  
Flow Behavior ◽  
High Strength ◽  
Forming Limit ◽  
Forming Limit Curve ◽  
Yield Criteria ◽  
Hardening Law ◽  
Stress Curve ◽  
Strain Paths ◽  
Cup Drawing ◽  
Better Than

In this work, the experimental and numerical analyses of Forming Limit Curve (FLC) and Forming Limit Stress Curve (FLSC) for Advanced High Strength Steel (AHSS) sheet, grade JAC780Y, are performed. Initially, the FLC is experimentally determined by means of the Nakazima Stretch forming test. Subsequently, the FLSC of investigated steel was plastically calculated using the experimental FLC data. Different yield criteria including Hill48, and Yld89, are applied to describe plastic flow behavior of the AHS steel and Swift hardening law is taken into account. Hereby, influences of the constitutive yield models on the numerically determined FLSCs are evaluated regarding to those results from the experimental data. The obtained stress based forming limits are affected significantly by the yield criteria. Finally, the experimental and numerical formability analyses of Fukui stretch-drawing and square cup drawing tests are studied through FLC and FLSCs. It is observed that all stress based curves can be used very well to describe material formability of the examined steel compared to the strain based FLC. The strain based FLC depend on forming history and strain paths change. In the other hand, the stress based FLC do not depend on these issue. In this study, it can be concluded that the FLSCs could predict failure more realistically and better than the strain based FLC.

Numerical Simulation using RANS-based Tools for America’s Cup Design

2003 ◽  
Author(s):  
Geoff Cowles ◽  
Nicola Parolini ◽  
Mark L. Sawley
Keyword(s):  
Design Process ◽  
Water Surface ◽  
Navier Stokes ◽  
Computational Fluid Dynamics Simulations ◽  
America’S Cup ◽  
Dynamics Simulations ◽  
École Polytechnique ◽  
Cup Design ◽  
Cup Drawing

The application of Computational Fluid Dynamics simulations based on the Reynolds Averaged Navier- Stokes (RANS) equations to the design of sailing yachts is becoming more commonplace, particularly for the America's Cup. Drawing on the experience of the Ecole Polytechnique Fédérale de Lausanne as Official Scientific Advisor to the Alinghi Challenge for the America’s Cup 2003, the role of RANS-based codes in the yacht design process is discussed. The strategy for simulating the hydrodynamic flow around the boat appendages is presented. Two different numerical methods for the simulation of wave generation on the water surface are compared. In addition, the aerodynamic flow around different sail configurations is investigated. The benefits to the design process as well as its limitations are discussed. Practical matters, such as manpower and computational requirements, are also considered.

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