Finite element analysis of spring back in Ti-6Al-4V alloy

2019 ◽  
Vol 18 ◽  
pp. 2693-2699
Author(s):  
M.A. Wahed ◽  
V.S.R. Gadi ◽  
A.K. Gupta ◽  
K. Supradeepan ◽  
S.K. Singh ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Spring Back ◽  
Element Analysis

Estimation of Spring-Back of Single Torus Inner Vessel Sector by Finite Element Analysis

2016 ◽  
Vol 852 ◽  
pp. 588-594
Author(s):  
Gagan Gupta ◽  
V. Balasubramaniyan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Technology Development ◽  
Cold Pool ◽  
Spring Back ◽  
Element Analysis ◽  
Finite Element Software ◽  
Reactor Assembly ◽  
Design Requirements ◽  
Inner Vessel

Inner vessel in reactor assembly of sodium cooled fast reactor separates hot and cold pool sodium. The shape of inner vessel is optimized with reduced upper & lower shell diameters and toroidal redan for future Fast Breeder Reactor (FBR). This results in higher buckling strength and reduced thickness and hence reduced weight. To achieve the intricate toroidal shape with specified dimensional tolerances, a comprehensive technology development exercise was carried out successfully for the manufacture of inner vessel 30° sector. The achieved profile of the redan meets the specified dimensions and other design requirements. Spring-back observed in the sector was small. To verify the developmental exercise results, a finite element analysis (FEA) of forming of inner vessel sector was performed on finite element software ABAQUS. In this paper, FEA results and spring back are discussed. Spring back assessed is maximum at the center and relatively lower towards the edges for the redan with the chosen radius of 5980 mm.

Standardization of Flattening Procedure of Transverse to Pipe Axis Strap Tensile Samples

2018 ◽  
Author(s):  
M. Rashid ◽  
S. Chen ◽  
L. E. Collins
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Tensile Testing ◽  
Standard Procedure ◽  
Large Diameter ◽  
Spring Back ◽  
Pipe Axis ◽  
Element Analysis ◽  
Line Pipe ◽  
Experimental Approaches

Tensile testing on large diameter line pipe is generally done using strap samples obtained in the transverse to pipe axis (TPA) orientation of a pipe. The strap samples are then flattened and machined prior to testing. Although the standardized tensile testing is well documented, the variability in the reported TPA tensile properties of the same material tested within a lab or at different labs has always been an issue. Recent work conducted at EVRAZ NA research lab has identified flattening as the main source of the variability in reported yield strength (YS) values for line pipe. The lack of a standard procedure for flattening TPA strap samples is a major obstacle to obtaining consistent results. Therefore, the main objective of this current study was to establish a standardized flattening procedure for TPA strap samples. Both finite element analysis (FEA) and experimental approaches were adopted. Various flattening methods and fixtures were studied. Extensive flattening experiments were conducted on TPA samples from different line pipe products. Results showed that the spring back after flattening in a TPA sample is different for pipes with different gauge and grades. It was established that consistent flattening can be achieved using appropriate fixtures for differerent ranges of tubular products defined by grade, diameter and gauges. Evaluation of the flattening fixture designs and experimental results are discussed in this paper.

Finite Element Analysis of the Valve Spring with Different Engine Speed

2011 ◽  
Vol 382 ◽  
pp. 224-228 ◽  
Author(s):  
Hong Yan Li ◽  
Xian Yue Gang ◽  
Shan Chai
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Engine Speed ◽  
Equivalent Stress ◽  
Spring Back ◽  
Element Analysis ◽  
Valve Spring ◽  
Intake Process

The valve spring endures alternate load during work, whose dynamic response is vital to the whole performance of the engine valve system. Finite element analysis of the valve spring is researched in the intake process of an engine during which the engine speed varies from 1000r/min to 5000r/min. The investigation indicates that the equivalent stress achieves maximum when the valve is full open following with spring back to some extent, although some residual stress still exist until the valve closed fully, both the intensity and fatigue life can satisfy design need. The distribution over all intake process appears normal distribution at low speed, the stress oscillates seriously with speed increasing.

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