Experiment and Meso-Damage Finite Element Analysis of Uniaxial Tension of Galvanized Steel Sheets

2012 ◽  
Vol 472-475 ◽  
pp. 547-555
Author(s):  
Zhi Ying Chen ◽  
Xiang Huai Dong
Keyword(s):  
Flow Stress ◽  
Uniaxial Tension ◽  
Volume Fraction ◽  
Simulation Analysis ◽  
Damage Model ◽  
Galvanized Steel ◽  
Forming Limit ◽  
Element Analysis ◽  
Steel Sheets ◽  
Whole Process

Uniaxial tension tests for galvanized steel sheets are performed. Fractured surfaces of the specimens are observed by means of the scanning electron microscope (SEM). It is confirmed that the specimens experience ductile fracture. Based on the Gurson meso-damage theory, Hill’48-GTN anisotropic damage model is presented, and used to analyze the uniaxial tension test. The true stress-strain curves are fitted by three kinds of main flow stress models. After comparing the fitting precisions, the Voce model is selected as the flow stress model for the simulation analysis. The simulation results show that the Hill’48-GTN model can be used to accurately predict the whole process of damage occurrence, evolution and fracture in tension, and void volume fraction can be taken as a forming limit parameter of sheet metal forming.

scholarly journals Study on the High-Speed Milling Performance of High-Volume Fraction SiCp/Al Composites

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4143
Author(s):  
Youzheng Cui ◽  
Shenrou Gao ◽  
Fengjuan Wang ◽  
Qingming Hu ◽  
Cheng Xu ◽  
...  
Keyword(s):  
High Speed ◽  
Large Scale ◽  
Volume Fraction ◽  
Simulation Analysis ◽  
Cutting Temperature ◽  
High Volume ◽  
Cutting Parameters ◽  
High Volume Fraction ◽  
High Wear Resistance ◽  
Element Analysis

Compared with other materials, high-volume fraction aluminum-based silicon carbide composites (hereinafter referred to as SiCp/Al) have many advantages, including high strength, small change in the expansion coefficient due to temperature, high wear resistance, high corrosion resistance, high fatigue resistance, low density, good dimensional stability, and thermal conductivity. SiCp/Al composites have been widely used in aerospace, ordnance, transportation service, precision instruments, and in many other fields. In this study, the ABAQUS/explicit large-scale finite element analysis platform was used to simulate the milling process of SiCp/Al composites. By changing the parameters of the tool angle, milling depth, and milling speed, the influence of these parameters on the cutting force, cutting temperature, cutting stress, and cutting chips was studied. Optimization of the parameters was based on the above change rules to obtain the best processing combination of parameters. Then, the causes of surface machining defects, such as deep pits, shallow pits, and bulges, were simulated and discussed. Finally, the best cutting parameters obtained through simulation analysis was the tool rake angle γ0 = 5°, tool clearance angle α0 = 5°, corner radius r = 0.4 mm, milling depth ap = 50 mm, and milling speed vc= 300 m/min. The optimal combination of milling parameters provides a theoretical basis for subsequent cutting.

Powdering in Coating Layer of Galvannealed Nb-Ti Free Extra Low Carbon Steel Sheet

2007 ◽  
Vol 345-346 ◽  
pp. 1089-1092
Author(s):  
S.I. Kim ◽  
D.J. Paik ◽  
Shi Hoon Choi ◽  
D.W. Kim ◽  
Y.C. Yang ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
Volume Fraction ◽  
Coating Layer ◽  
Low Carbon Steel ◽  
Bending Test ◽  
Low Carbon ◽  
Forming Process ◽  
Element Analysis ◽  
Steel Sheets ◽  
Hardness Variation

We have studied the fracture behavior of coating layer when low and high alloying galvannealed (GA) steels are subject to forming process. To understand better powdering features in the coating layer of the steel sheets, we carried out V-bending test and a series of finite element analysis which simulates damage characteristics in the coating layer. Results showed that the powdering behavior in the coating is significantly affected by the soundness and volume fraction of phases in the coating layer. The hardness variation of coating layers attributed to different phases leads to different deformation behavior of the coating layer itself.

Prediction of Forming Limit of Dual-Phase 500 Steel Sheets Using the GTN Ductile Damage Model in an Innovative Hydraulic Bulging Test

JOM ◽  
2018 ◽  
Vol 70 (8) ◽  
pp. 1542-1547 ◽  
Author(s):  
Xiao-Lei Cui ◽  
W. W. Zhang ◽  
Zhi-Chao Zhang ◽  
Yi-Zhe Chen ◽  
Peng Lin ◽  
...  
Keyword(s):  
Damage Model ◽  
Ductile Damage ◽  
Forming Limit ◽  
Dual Phase ◽  
Steel Sheets ◽  
Bulging Test ◽  
Hydraulic Bulging

Forming Limit Diagram Determination of Al 3105 Sheets and Al 3105/Polypropylene/Al 3105 Sandwich Sheets Using Numerical Calculations and Experimental Investigations

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
M. H. Parsa ◽  
M. Ettehad ◽  
P. H. Matin
Keyword(s):  
Damage Model ◽  
Sheet Thickness ◽  
Forming Limit Diagram ◽  
Forming Limit ◽  
Experimental Investigations ◽  
Element Analysis ◽  
Gtn Damage Model ◽  
Core Thickness ◽  
Sandwich Sheets

Sandwich sheet structures are gaining a wide array of applications in the aeronautical, marine, automotive, and civil engineering fields. Since such sheets can be subjected to forming/stamping processes, it is crucial to characterize their limiting amount of deformation before trying out any forming/stamping process. To achieve this goal, sandwich sheets of Al 3105/polymer/Al 3105 were prepared using thin film hot melt adheres. Through an experimental effort, forming limit diagrams (FLDs) of the prepared sandwich sheets were evaluated. In addition, simulation efforts were conducted to predict the FLDs of the sandwich sheets using finite element analysis (FEA) by considering the Gurson–Tvergaard–Needleman (GTN) damage model. The agreement among the experimental results and simulated predictions was promising. The effects of different parameters such as polymer core thickness, aluminum face sheet thickness, and shape constraints were investigated on the FLDs.

Structural Performance of Eccentric Ferrocement Reinforced Concrete Columns

2019 ◽  
Vol 11 (9) ◽  
pp. 1213-1225
Author(s):  
Abeer M. Erfan ◽  
Hossam H. Ahmed ◽  
Bishoy A. Mina ◽  
Taha A. El-Sayed
Keyword(s):  
Reinforced Concrete ◽  
Volume Fraction ◽  
Steel Wire ◽  
Concrete Columns ◽  
Galvanized Steel ◽  
Experimental Program ◽  
Element Analysis ◽  
Reinforced Concrete Columns ◽  
Steel Mesh ◽  
Wire Meshes

This research proposed a method for producing reinforced composite concrete columns, reinforced with different types of steel wire meshes. The experimental program included casting and testing of nine square columns with dimensions of 200 mm × 200 mm × 1500 mm under eccentric compression load, with an eccentricity equaling 25 mm from the column center in x direction. The experimental program specimens comprised of four designation series to make comparative study between conventionally reinforced concrete columns. Concrete columns reinforced with steel bars and stirrups as control specimen and other groups were expanded steel mesh and welded steel mesh but the fourth group used modified and galvanized steel wire meshes of expanded and welded type. The main variables were type of reinforcing materials, number of layers and volume fraction of reinforcement. The main objective was to evaluate the effectiveness of employing the new materials in reinforcing the composite concrete columns in enhancing the confinement of concrete column and resistance for eccentric loads. Results indicated that this methodology of concrete columns reinforcement can be developed in high strength, crack resistance, high ductility and energy absorption properties. Moreover, Non-linear finite element analysis (NLFEA) was carried out to simulate the behaviour of the reinforced concrete columns under eccentric loads. The analytical model was agreed with experimental results employing ANSYS-14.5 Software.

Finite element analysis on eccentric compression of reinforced concrete columns strengthened by prestressed polyethylene terephthalate straps and angle steel

2021 ◽  
pp. 136943322110339
Author(s):  
Jianhui Si ◽  
Jiebin Chen ◽  
Shixiong Qiu ◽  
Shuyang Feng ◽  
Wenjing Guo
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Finite Element Simulation ◽  
Polyethylene Terephthalate ◽  
Simulation Analysis ◽  
Damage Model ◽  
Utilization Rate ◽  
Element Analysis ◽  
Element Simulation ◽  
Angle Steel

To overcome the lagged strain and insufficient stiffness of conventional reinforced structures, this article proposes a reinforcement method realized by combining prestressed polyethylene terephthalate (PET) straps and angle steel. This combined reinforcement method relies on the active restraint force provided by the PET straps and the vertical bearing capacity provided by the angle steel to improve the bearing capacity and ductility of reinforced structures. This article introduces the experimental process applied to the combined reinforced columns. Thereafter, a finite element simulation model of the columns strengthened by prestressed PET straps and angle steel was established on the basis of the experiment. A plastic damage model was used for the concrete. An ideal elastoplastic model was used for the PET straps, angle steel, and steel bars. In the finite element simulation analysis, a multiparameter analysis was conducted on the eccentric distance, packaging distance, and packaging method. The research results showed that as the packing spacing of the PET straps decreases, the confinement area of the column increases, and the load-bearing capacity and ductility of the specimens increase to some extent. With the increase in the eccentricity, the increase in the bearing capacity of the combined reinforced column is less. Nevertheless, there is significant improvement in the ductility performance. Considering the economy and reinforcement effects, the mesh packing method produces the best results. This article introduces parameters such as the restraint stress of the PET straps and the utilization rate of the angle steel. A calculation formula for the small-eccentric bearing capacity of the combined reinforced column was established, providing a theoretical basis for engineering applications.

Test and Analysis on Seismic Strengthening Effects of FRP Wrapped RC Exterior Joints

2011 ◽  
Vol 243-249 ◽  
pp. 5547-5551
Author(s):  
Ya Ping Peng ◽  
Guang Dong ◽  
Peng Li
Keyword(s):  
Simulation Analysis ◽  
Seismic Strengthening ◽  
Analysis Software ◽  
Element Analysis ◽  
The Core ◽  
Whole Process ◽  
Frp Reinforcement ◽  
Loading Tests ◽  
The Moment ◽  
Cyclic Loading Tests

The method of seismic strengthening the RC frame T-shaped joints with FRP was designed. Its significant effect of seismic reinforcement was verified through cyclic loading tests. The joints models were established using finite element analysis software ANSYS. The whole process of monotonic loading at the beam end were simulated numerically in order to study in depth of the mechanism of FRP reinforcement. Experimental results and numerical simulation analysis showed that: fibers wrapped in the core area of the joints could improve the strength of concrete, and bear part shear of the joints; bending fibers at the beam-column end played to take parts of the moment and reduce the stress of longitudinal bars in the corresponding parts, thus improving indirectly the bearing capacity and ductility of the members strengthened using FRP increased; the stiffness of the joints strengthened with FRP increased when identical loading.

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