A hydro-bulging mechanism of tailor-welded tubes with dissimilar thickness

2009 ◽  
Vol 224 (1) ◽  
pp. 19-24 ◽  
Author(s):  
G N Chu ◽  
G Liu
Keyword(s):  
Finite Element ◽  
Weld Seam ◽  
Mechanical Analysis ◽  
Length Ratio ◽  
Stress And Strain ◽  
Deformation Characteristics ◽  
Element Analysis ◽  
Element Simulation ◽  
Dissimilar Thickness ◽  
Deformation Compatibility

To reveal the deformation characteristics and influence of dissimilar thickness on hydro-bulging of tailor-welded tubes (TWT), a finite-element analysis (FEA), experiments, and a mechanical analysis were conducted. Based on the stress and strain resulting from finite-element simulation, it was concluded that the deformation of the thicker tube lags behind that of the thinner tube throughout the bulging process. The plastic deformation occurs first at the middle zone of the thinner tube and then extends to the thicker tube crossing the weld seam. In general, the expansion occurring on the two parts with dissimilar thickness is non-uniform. However, the higher the length ratio, the higher the deformation compatibility. When the length ratio reaches 0.8, the deformation between two tubes is almost synchronic. It is concluded that the mechanism for improving the deformation compatibility is to induce a deformation in the thicker tube by enhancing the bulging pressure needed for a deformation in the thinner tube by changing the stress state in the thinner tube and applying the work-hardening effect.

Study on Mechanical Properties of the Tubular Textile Composite Using Finite Element Analysis

2011 ◽  
Vol 332-334 ◽  
pp. 945-948
Author(s):  
Shu Jie Zhang ◽  
Rui Wang ◽  
Chong Qi Ma
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Composite Material ◽  
Water Pressure ◽  
Stress And Strain ◽  
Textile Composite ◽  
Simulation Data ◽  
Element Analysis ◽  
Element Simulation ◽  
The Finite Element Analysis

The tubular textile composite material as the liner is inversed in the pipeline by gas or water pressure, and then the damaged pipeline can be rehabilitated. During inversion, because of the inversion pressure, the tubular textile composite material must endure the complicated stress and strain. Adopting the Finite Element Analysis, the paper analyzed the stress and strain of the tubular textile composite during inversion, and the finite element simulation data compared with test data. The results show that the stress and strain in head of the tubular textile composite material during inversion is instability, where the stress is concentrative, so the head of the tubular textile composite material is easy to break.

Finite Element Simulation of Deformation Process of 316L Expandable Slotted Base Pipe at Room Temperature

2011 ◽  
Vol 402 ◽  
pp. 719-723
Author(s):  
Wen Zhu Shen ◽  
Chun Fu Li ◽  
Kai Hong Song ◽  
Yan Qun Wang ◽  
Hai Bo Zhu ◽  
...  
Keyword(s):  
Finite Element ◽  
Deformation Process ◽  
Room Temperature ◽  
Contact Process ◽  
Mechanical Analysis ◽  
Contact Friction ◽  
Analysis Model ◽  
Expansion Process ◽  
Element Analysis ◽  
Element Simulation

Expandable screen called slotted base pipe functions as skeleton structure in expandable screen. The expansion process is very complicated due to the existence of slots on slotted base pipe and contact friction between expansion tools and tubular. In this work, based on elastic-plastic mechanical analysis of the expandable slotted tube in expansion process, the 3D nonlinear finite element analysis model of contact process was built. Aiming at two specifications of 4-1/2 and 6-5/8 inches 316L stainless steel slotted tubular, expansion deformation process at room temperature with expansion ratios of 25-35% range was simulated. With those works, it hopes to provide a useful foundation for the formulation of expansion technology of expandable screen.

Stress and Deformation Analyses of Large Diameter Blind Flange Connections Subjected to Bolt Loads and Internal Pressure

2011 ◽  
Author(s):  
Takashi Kobayashi ◽  
Masahiro Kogasaka ◽  
Kengou Nishiura ◽  
Uchiyama Kazuaki
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Thrust Force ◽  
Large Diameter ◽  
Stress And Strain ◽  
Deformation Characteristics ◽  
Element Analysis ◽  
Piping Systems ◽  
Stress And Deformation ◽  
High Thrust

Leakage problems caused in large diameter gasketed flanged connections in piping systems are closely related to deformation of flanges caused by the high thrust force and rather low rigidity of the flanges. Therefore, it is necessary to understand the deformation characteristics of flanged connections when they are tightened and pressurized. In this study, experiments were carried out using a 16-inch gasketed flanged connection to examine the stress and strain in the flanges. In order to clarify the deformation characteristics of the gasketed flanged connection, a method to analyze stresses and deformations of a gasketed flanged connection was demonstrated using the classical theory by Timoshenko. Recently, finite element analysis (FEA) has widely been used in the analysis of gasketed flanged connections. However, analyses of flanged connection based on the analytical method using strength of materials are still important when parametric calculations of flanged connection are necessary. The experimental results and the analytical ones were compared and discussed to clarify the sealing behaviors of large diameter gasketed flanged connection.

Analysis of magnetic force and dynamic characteristic for non-contact permanent magnet linear drive device

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1337-1345
Author(s):  
Chuan Zhao ◽  
Feng Sun ◽  
Junjie Jin ◽  
Mingwei Bo ◽  
Fangchao Xu ◽  
...  
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Dynamic Characteristic ◽  
Driving Force ◽  
Magnetic Circuit ◽  
Response Speed ◽  
Computation Method ◽  
Element Analysis ◽  
Element Simulation ◽  
The Relationship

This paper proposes a computation method using the equivalent magnetic circuit to analyze the driving force for the non-contact permanent magnet linear drive system. In this device, the magnetic driving force is related to the rotation angle of driving wheels. The relationship is verified by finite element analysis and measuring experiments. The result of finite element simulation is in good agreement with the model established by the equivalent magnetic circuit. Then experiments of displacement control are carried out to test the dynamic characteristic of this system. The controller of the system adopts the combination control of displacement and angle. The results indicate that the system has good performance in steady-state error and response speed, while the maximum overshoot needs to be reduced.

Redrawing Operation a Star Shape from Cylindrical Shape Using Experimental and FE Analysis

2020 ◽  
Vol 38 (1A) ◽  
pp. 25-32
Author(s):  
Waleed Kh. Jawad ◽  
Ali T. Ikal
Keyword(s):  
Finite Element ◽  
Effective Strain ◽  
Element Model ◽  
Cylindrical Shape ◽  
Element Analysis ◽  
Punch Force ◽  
Maximum Value ◽  
Element Simulation ◽  
Blank Sheet ◽  
The Finite Element Model

The aim of this paper is to design and fabricate a star die and a cylindrical die to produce a star shape by redrawing the cylindrical shape and comparing it to the conventional method of producing a star cup drawn from the circular blank sheet using experimental (EXP) and finite element simulation (FES). The redrawing and drawing process was done to produce a star cup with the dimension of (41.5 × 34.69mm), and (30 mm). The finite element model is performed via mechanical APDL ANSYS18.0 to modulate the redrawing and drawing operation. The results of finite element analysis were compared with the experimental results and it is found that the maximum punch force (39.12KN) recorded with the production of a star shape drawn from the circular blank sheet when comparing the punch force (32.33 KN) recorded when redrawing the cylindrical shape into a star shape. This is due to the exposure of the cup produced drawn from the blank to the highest tensile stress. The highest value of the effective stress (709MPa) and effective strain (0.751) recorded with the star shape drawn from a circular blank sheet. The maximum value of lamination (8.707%) is recorded at the cup curling (the concave area) with the first method compared to the maximum value of lamination (5.822%) recorded at the cup curling (the concave area) with the second method because of this exposure to the highest concentration of stresses. The best distribution of thickness, strains, and stresses when producing a star shape by

scholarly journals Mechanical analysis of prosthetic bars and dental implants in 3 and 4 implant-supported overdenture protocols using finite element analysis

2021 ◽  
Author(s):  
Luiz Bassi Junior ◽  
Rafael Oliveira de Souza Silva ◽  
Victor Hugo Dias dos Santos ◽  
Abner da Rocha Lourenço ◽  
Paulo Vinicius Trevizoli ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dental Implants ◽  
Mechanical Analysis ◽  
Element Analysis

Finite Element Simulation of Stable Fatigue Crack Growth Using Critical CTOD Determined by Preliminary Finite Element Analysis

2014 ◽  
Vol 891-892 ◽  
pp. 1675-1680
Author(s):  
Seok Jae Chu ◽  
Cong Hao Liu
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Finite Element Simulation ◽  
Crack Growth ◽  
Crack Tip ◽  
Stress Intensity Factor Range ◽  
Crack Tip Opening Displacement ◽  
Element Analysis ◽  
Element Simulation

Finite element simulation of stable fatigue crack growth using critical crack tip opening displacement (CTOD) was done. In the preliminary finite element simulation without crack growth, the critical CTOD was determined by monitoring the ratio between the displacement increments at the nodes above the crack tip and behind the crack tip in the neighborhood of the crack tip. The critical CTOD was determined as the vertical displacement at the node on the crack surface just behind the crack tip at the maximum ratio. In the main finite element simulation with crack growth, the crack growth rate with respect to the effective stress intensity factor range considering crack closure yielded more consistent result. The exponents m in the Paris law were determined.

Finite Element Analysis of Motor Box for EBZ160 Horizontal Roadheader

2015 ◽  
Vol 1090 ◽  
pp. 233-237
Author(s):  
Ji Jun Miao ◽  
Ri Sheng Long
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
Safety Factor ◽  
Stress And Strain ◽  
Element Analysis

In order to solve the cracking and poor reliability problems of motor box of Horizontal Roadheader, the static structural FEA (Finite Element Analysis) of cutting arm & motor box of the EBH160 Horizontal Roadheader was conducted, and the stress and strain contours of FEA were obtained. By comparing the calculated results, the safety factor of cutting arm & motor box was 1.36, which provides a reference for the optimal design of cutting arm & motor box.

Sign in / Sign up

Export Citation Format

Share Document