Axial Load Capacity of Cold Formed Pipe Flange Connection

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Jan Henriksen ◽  
Michael R. Hansen ◽  
Fredrik Christopher Thrane
Keyword(s):  
Experimental Data ◽  
Axial Load ◽  
Load Capacity ◽  
Fe Model ◽  
Forming Process ◽  
Cold Forming ◽  
Flange Connection ◽  
Fe Simulations ◽  
Axial Load Capacity ◽  
Set Up

In this paper, a cold forming process is used where the connection between a pipe and a flange is created by means of radially expanding tool segments inside the pipe. The method is investigated with two purposes, to set up a robust procedure for the process that allows for connections to be made on site, and to set up finite element (FE) simulations that can capture the forces and deformations when pulling the pipe axially out of the flange. Experimental data and FE simulations are used to describe and understand the forces and deformations during the connection process. The rapid increase in radial stiffness experienced when the pipe comes in full circumferential contact with the flange is identified as the best end-of-process indicator. Also, experimental data and FE simulations are used to predict the axial load capacity of a pipe flange connection, and the FE model is utilized in designing the appropriate ridge height of the tool segments.

scholarly journals Modeling of the Axial Load Capacity of RC Columns Strengthened with Steel Jacketing under Preloading Based on FE Simulation

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Ahmed M. Sayed ◽  
Hesham M. Diab
Keyword(s):  
Axial Load ◽  
Failure Modes ◽  
Fe Simulation ◽  
Load Capacity ◽  
Three Dimensional ◽  
Fe Model ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Rc Columns ◽  
Axial Load Capacity

Reinforced concrete (RC) columns often require consolidation or rehabilitation to enhance their capacity to endure the loads applied. This paper aims at studying the conduct and capacity of RC square columns, those reinforced with steel jacketing under static preloads. For this purpose, a three-dimensional model of finite element (FE) is devised mainly to investigate and analyze the effect of this case. The model was tested and adjusted to ensure its accuracy using the previous experimental results obtained by the author. Results of testing, experimentally, the new developed FE model revealed the ability to use the model for calculating RC columns’ axial load capacity and for predicting accurate failure modes. The new model that tends to predict the axial load capacity was suggested considering the parametric analysis results.

Axial load-capacity of rectangular cement stabilized rammed earth column

2015 ◽  
Vol 99 ◽  
pp. 402-412 ◽  
Author(s):  
Deb Dulal Tripura ◽  
Konjengbam Darunkumar Singh
Keyword(s):  
Axial Load ◽  
Load Capacity ◽  
Rammed Earth ◽  
Axial Load Capacity

Axial load capacity of cylindrical shells with local geometric defects

1991 ◽  
Vol 31 (2) ◽  
pp. 104-110 ◽  
Author(s):  
S. Krishnakumar ◽  
C. G. Foster
Keyword(s):  
Axial Load ◽  
Load Capacity ◽  
Cylindrical Shells ◽  
Axial Load Capacity

Finite Element Simulation and Experimental Study on Blow Forming of Plastic Cups

2011 ◽  
Vol 148-149 ◽  
pp. 1319-1322
Author(s):  
Xiao Hu ◽  
Yi Sheng Zhang ◽  
Hong Qing Li ◽  
De Qun Li
Keyword(s):  
Finite Element ◽  
Thickness Distribution ◽  
Viscoelastic Model ◽  
Engineering Practice ◽  
Fe Model ◽  
Thin Wall ◽  
Forming Process ◽  
Element Simulation ◽  
Physically Based ◽  
Set Up

Blow forming process of plastic sheets is simple and easy to realize, thus, it is widely used for plastic thin-wall parts. In the practical production, an effective method is needed for the preliminary set-up of process parameters in order to achieve accurate control of thickness distribution. Thus, a finite element method (FEM) code is used to simulate blow forming process. For better description of complex material theological characteristics, a physically based viscoelastic model (VUMAT forms Buckley model) to model the complex constitutive behavior is used. Nonlinear FE analyses using ABAQUS were carried out to simulate the blow forming process of plastic cups. The actual values at different locations show a satisfactory agreement with the simulation results: as a matter of fact the error along the cell mid-section did not exceed 0.02 mm on average, corresponding to 5% of the initial thickness, thus the FE model this paper can meet the requirements of the engineering practice.

EFFECT OF ASPECT RATIO ON THE BEHAVIOR OF GFRP-RC CIRCULAR COLUMNS UNDER SIMULATED SEISMIC LOADING

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Amr Elsayed Mohammed Abdallah ◽  
Ehab Fathy El-Salakawy
Keyword(s):  
Aspect Ratio ◽  
Axial Load ◽  
Load Capacity ◽  
Load Level ◽  
Experimental Results ◽  
Rc Columns ◽  
Drift Capacity ◽  
Glass Fiber Reinforced ◽  
Axial Load Capacity ◽  
Code Provisions

The mechanical and physical properties of glass fiber-reinforced polymer (GFRP) reinforcement are different from steel, which requires independent code provisions for GFRP-reinforced concrete (RC) members. The currently available code provisions for GFRP-RC members still need more research evidence to be inclusive. For example, the available provisions for confinement reinforcement of FRP-RC columns do not consider the effects of column aspect ratio, which is not yet supported by any available research data. In this study, two full-scale spirally reinforced GFRP-RC circular columns were constructed and tested under concurrent seismic and axial loads. Both specimens had an aspect ratio (shear span-to-diameter ratio) of 7.0, while other two specimens with an aspect ratio of 5.0, from a previous stage of this study, were included for comparison purposes. For each aspect ratio, each specimen was loaded under one of two levels of axial load; 20 or 30% of the axial load capacity of the column section. All test specimens had a 35 MPa concrete compressive strength, 350-mm diameter, 85-mm spiral pitch and 1.2% longitudinal reinforcement ratio. The experimental results were analyzed in terms of hysteretic response, drift capacity and inelastic deformability hinge length. Based on the experimental results, it can be concluded that the aspect ratio affects the magnitude of secondary moments and inelastic deformability hinge length. In addition, the aspect ratio may affect drift capacity of GFRP-RC columns, depending on axial load level.

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