Formability Assessment in Single Point Incremental Sheet Forming through Finite Element Analysis

2018 ◽  
Vol 5 (11) ◽  
pp. 25430-25439 ◽  
Author(s):  
Swapnil Deokar ◽  
P.K. Jain ◽  
Puneet Tandon
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Single Point ◽  
Sheet Forming ◽  
Incremental Sheet Forming ◽  
Element Analysis

Finite Element Analysis of Fiber Composite Dental Bridges: The Effect of Length / Depth Ratio and Load Application Method

1999 ◽  
Author(s):  
Michael D. Nowak ◽  
Kim Haser ◽  
A. Jon Goldberg
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Testing ◽  
Fiber Composite ◽  
Single Point ◽  
Element Analysis ◽  
Elastic Range ◽  
Single Force ◽  
Range Testing ◽  
Fiber Reinforce

Abstract Work is continuing in the evaluation of orthotropic fiber reinforce composites for use in the construction of dental bridges. Finite Element Analysis (FEA) models were constructed based upon mechanical testing of end clamped specimens center loaded with a metal indenter. Various length / depth specimens were evaluated in the elastic range, with a variety of load magnitudes. Separate FEA models utilized single point loading, distributed loading, and the construction of a model indenter. Deflections at the loading point demonstrated that all models presented similar findings to those seen in mechanical testing. The similarity of results between the single loading point and the indenter FEA models suggest that either is reasonable for elastic range testing. The significantly shorter CPU run times for the single force models suggest that this may be the best means by which to model orthotropic fiber reinforced dental composites in the elastic range.

scholarly journals Finite Element Analysis of Springback of High-Strength Metal SCGA1180DUB While U-Channeling, According to Wall Angle and Die Radius

2021 ◽  
Author(s):  
Samet Karabulut ◽  
İsmail Esen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Sheet Thickness ◽  
High Strength ◽  
Sheet Forming ◽  
High Yield ◽  
Process Conditions ◽  
Wall Angle ◽  
Element Analysis ◽  
Multi Phase

Abstract Springback is a problem as important as tearing or thinning, while forming high-strength sheets. Springback is an undesirable situation and it is the form difference between the desired form of a part in theory and the form obtained due to mechanical characteristics and process inputs of the material after die forming. It affects operations in shearing, punching or bending dies in subsequent operations in forming die sets. If the part is not within the desired tolerance range, it creates problems during assembly. In order for cost effective production plans for automotive parts to be made, suitable sheet forming simulations are needed. Waste of time and failures during die construction are minimized by defining accurate parameters by finite element analyses and minimizing periods of trial-and-error. In this study, the material SCGA1180DUB in sheet thickness of 0.8 mm from multi-phase steel sheet group was U-channeled, using Autoform sheet forming analysis program, according to appropriate process conditions having wall angles of 7°,10°,12° and die radius values of R3, R5, R8 and the springback values were estimated. The results obtained were compared through the finite element program and suitable wall angle and die radius values for the material SCGA1180DUB for forming advanced high-strength sheets were determined. As the die radii increased at the same wall angles, the amount of spring back increased significantly. In particular, due to high yield and tensile strength of multi-phase high strength sheet, springback values were observed to be high. Negative springbacks were observed in the roof of the part. In the same die radii, under the same process conditions, as wall angles increase, springback values decreased. In the literature, it is interesting that there are few studies regarding forming, springback of high-strength sheets SCGA1180DUB. This study will contribute to the literature. Autoform program was used for Finite Element Analysis.

scholarly journals Multistage Tool Path Optimisation of Single-Point Incremental Forming Process

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6794
Author(s):  
Zhou Yan ◽  
Hany Hassanin ◽  
Mahmoud Ahmed El-Sayed ◽  
Hossam Mohamed Eldessouky ◽  
Joy Rizki Pangestu Djuansjah ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Processing Time ◽  
Incremental Forming ◽  
Single Point ◽  
Computational Time ◽  
Single Point Incremental Forming ◽  
Two Stage ◽  
Element Analysis ◽  
Wide Range

Single-point incremental forming (SPIF) is a flexible technology that can form a wide range of sheet metal products without the need for using punch and die sets. As a relatively cheap and die-less process, this technology is preferable for small and medium customised production. However, the SPIF technology has drawbacks, such as the geometrical inaccuracy and the thickness uniformity of the shaped part. This research aims to optimise the formed part geometric accuracy and reduce the processing time of a two-stage forming strategy of SPIF. Finite element analysis (FEA) was initially used and validated using experimental literature data. Furthermore, the design of experiments (DoE) statistical approach was used to optimise the proposed two-stage SPIF technique. The mass scaling technique was applied during the finite element analysis to minimise the computational time. The results showed that the step size during forming stage two significantly affected the geometrical accuracy of the part, whereas the forming depth during stage one was insignificant to the part quality. It was also revealed that the geometrical improvement had taken place along the base and the wall regions. However, the areas near the clamp system showed minor improvements. The optimised two-stage strategy successfully decreased both the geometrical inaccuracy and processing time. After optimisation, the average values of the geometrical deviation and forming time were reduced by 25% and 55.56%, respectively.

Efficient implicit finite element analysis of sheet forming processes

2003 ◽  
Vol 56 (8) ◽  
pp. 1083-1107 ◽  
Author(s):  
A. H. van den Boogaard ◽  
T. Meinders ◽  
J. Huétink
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Sheet Forming ◽  
Element Analysis
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