Analytical models for the initial axial tensile stiffness and ultimate tensile load of a T-stub, including the effects of prying action

2013 ◽  
Vol 13 (2) ◽  
pp. 341-352 ◽  
Author(s):  
Jae-Guen Yang ◽  
Hyun-Kwang Kim ◽  
Jae-Ho Park ◽  
Min-Chang Back
Keyword(s):  
Tensile Load ◽  
Analytical Models ◽  
Tensile Stiffness ◽  
Prying Action ◽  
Axial Tensile

Optimal Design of a Composite Scarf Repair Under Uni-Axial Tension Loading

2008 ◽  
Author(s):  
T. D. Breitzman ◽  
B. M. Cook ◽  
G. A. Schoeppner ◽  
E. V. Iarve
Keyword(s):  
Tensile Load ◽  
Optimal Designs ◽  
Analytical Models ◽  
Linear Elastic ◽  
Repair Patch ◽  
Axial Tension ◽  
Axial Tensile ◽  
Notched Strength ◽  
Tension Loading ◽  
Good Agreement

Benchmark un-notched strength testing was used to characterize material properties for IM6/3501-6 composite material and to establish parameters for critical failure volume (CFV) (see [8]) analysis tools. Critical failure volume was used to predict the strength of scarfed composites, as well as composites having a scarf repair patch. Baseline repairs were created both without and with over-plies. Simplex optimization was performed on the analytical models to determine the repair stacking sequence that would result in the largest tensile strength for the repairs. The repair was optimized in the linear elastic regime, but strength predictions took into account both geometric nonlinearities of the respective materials and the material nonlinearities of the adhesive. Predicted strengths were in good agreement with experimental results, and the resultant optimal designs increased the strength of the repair under uni-axial tensile load by 10–20%.

SEM in situ study on the mechanical behaviour of SiCf/Ti composite subjected to axial tensile load

2011 ◽  
Vol 528 (13-14) ◽  
pp. 4507-4515 ◽  
Author(s):  
Kashif Naseem ◽  
Yanqing Yang ◽  
Xian Luo ◽  
Bin Huang ◽  
Guanghai Feng
Keyword(s):  
Mechanical Behaviour ◽  
Tensile Load ◽  
In Situ Study ◽  
Axial Tensile

Analysis of Premium Connection of Connecting and Sealing Ability Loaded by Axial Tensile Loads

2012 ◽  
Vol 268-270 ◽  
pp. 737-740
Author(s):  
Yang Yu ◽  
Yi Hua Dou ◽  
Fu Xiang Zhang ◽  
Xiang Tong Yang
Keyword(s):  
Finite Element ◽  
Contact Pressure ◽  
Tensile Load ◽  
Element Model ◽  
Sealing Ability ◽  
Axial Tensile ◽  
High Level ◽  
Maximum Contact ◽  
Contact Pressures ◽  
The Finite Element Model

It is necessary to know the connecting and sealing ability of premium connection for appropriate choices of different working conditions. By finite element method, the finite element model of premium connection is established and the stresses of seal section, shoulder zone and thread surface of tubing by axial tensile loads are analyzed. The results show that shoulder zone is subject to most axial stresses at made-up state, which will make distribution of stresses on thread reasonable. With the increase of axial tensile loads, stresses of thread on both ends increase and on seal section and shoulder zone slightly change. The maximum stress on some thread exceed the yield limit of material when axial tensile loads exceed 400KN. Limited axial tensile loads sharply influence the contact pressures on shoulder zone while slightly on seal section. Although the maximum contact pressure on shoulder zone drop to 0 when the axial tensile load is 600KN, the maximum contact pressure on seal section will keep on a high level.

scholarly journals Strain Capacity of Girth Welded Joints in HSAW Pipes

2017 ◽  
Author(s):  
Koen Van Minnebruggen ◽  
Stijn Hertelé ◽  
Wim De Waele
Keyword(s):  
Welded Joints ◽  
Structural Integrity ◽  
Tensile Load ◽  
Tensile Loading ◽  
Experimental Result ◽  
Large Strains ◽  
Automatic Welding ◽  
Strain Capacity ◽  
Axial Tensile ◽  
Welding Processes

The general aim of a recently finalized European project, i.e. EU RFCS SBD-Spipe, is to generate specific know-how concerning the development and possible use of spirally welded pipes for demanding applications. The demanding applications relate especially to structural integrity issues, both onshore and offshore, requiring good performance under application of large strains resulting in buckling, collapse and/or tensile loading. The outcome of this project can also be used as technical basis for improving standards and guidelines, that address design and safety of spirally welded pipelines. The contribution of Ghent University to this project focusses on the aspects of tearing resistance, defect tolerance and strain capacity of girth welded joints subjected to remote axial tensile load. A numerical and experimental approach is used for the assessment of flaw tolerability and strain development upon tensile loading. Spiral pipes of steel grade API-5L X70 with 36” and 48” diameters have been girth welded using both a manual and semi-automatic welding processes. Curved wide plate specimens have been extracted from the pipes and artificial weld defects have been introduced. The specimens have been loaded in tension up to failure at a temperature of −10°C. This paper reports on the experimental result of a series of curved wide plate tests.

Crack Development in Concrete, Part 1: Fracture Experiments and CT-Scan Observations

2008 ◽  
Vol 385-387 ◽  
pp. 69-72 ◽  
Author(s):  
Erik Schlangen
Keyword(s):  
Ct Scan ◽  
Crack Path ◽  
3D Structure ◽  
Tensile Load ◽  
Tensile Tests ◽  
Crack Development ◽  
3D Microstructure ◽  
Axial Tensile ◽  
Concrete Part

This paper describes a method to measure the 3D-microstructure of a material which can be used to perform fracture simulations. A model concrete is made and the 3D structure is obtained with a CTscanner. Uni-axial tensile tests are performed on cylindrical specimens of the model concrete a regular concrete and of a mortar. The model concrete shows more micro-cracking, a more tortuous crack path, a lower tensile load and a less brittle behaviour compared to the mortar and the regular concrete. Furthermore it is found that the opening of the crack is more uniform when the material is more heterogeneous, which results in a more stable fracture.

scholarly journals Tension and Compression Behaviour of Fly Ash-Lime-Gypsum Composite Mixed with Treated Tyre Chips

2011 ◽  
Vol 2011 ◽  
pp. 1-15 ◽  
Author(s):  
S. P. Guleria ◽  
R. K. Dutta
Keyword(s):  
Fly Ash ◽  
Axial Strain ◽  
Compressive Load ◽  
Tensile Load ◽  
Constructional Material ◽  
Toughness Index ◽  
Road Pavement ◽  
Curing Period ◽  
Axial Tensile ◽  
Tension And Compression

This paper presents the results of effect of inclusion of water, sodium hydroxide and carbon tetrachloride treated tire chips on Compressive load, tensile load, axial strain, diametral strain, toughness index and post peak behaviour of the reference mix containing fly ash + 8% lime + 0.9% gypsum for a curing period varying from 7 to 180 days using three different curing methods. The results of this study revealed that the axial/diametral strain, axial/tensile load of reference mix mixed with dry tyre chip can be increased with the treatment provided on dry tyre chips. The axial/diametral strain, axial/tensile load, toughness index improves with the change in curing method and curing period. Potential use of this relatively new constructional material can be road pavement having light traffic.

scholarly journals Transverse Deformation of Pressurised Pipes With Different Axial Loads

2017 ◽  
Author(s):  
Martin Kristoffersen ◽  
Tore Børvik ◽  
Magnus Langseth ◽  
Håvar Ilstad ◽  
Erik Levold
Keyword(s):  
Internal Pressure ◽  
Axial Load ◽  
Tensile Load ◽  
Displacement Curve ◽  
Design Codes ◽  
Axial Loads ◽  
Axial Tensile ◽  
Local Dent ◽  
Force Displacement ◽  
Good Agreement

Pipelines residing on the seabed are exposed to various hazards, one of them being denting, hooking and release of the pipeline by e.g. anchors or trawl gear. As a pipeline is displaced transversely in a hooking event, an axial tensile load resisting the displacement builds up in the pipeline. This study examines the effect of applying three different axial loads (zero, constant, and linearly increasing) to a pipe while simultaneously deforming it transversely. A fairly sharp indenter conforming to the prevailing design codes was used to deform the pipes. These three tests were repeated with an internal pressure of about 100 bar for comparison. Adding an axial load appeared to increase the pipe’s stiffness in terms of the force-displacement curve arising from deforming the pipe transversely. The internal pressure also increased the stiffness, and produced a more local dent in the pipe compared with the unpressurised pipes. All tests were recreated numerically in finite element simulations. Generally, the results of the simulations were in good agreement with the experiments.

scholarly journals Determination of Cable Tension Force using Accelerometer

2019 ◽  
Vol 9 (2) ◽  
pp. 224-229
Keyword(s):  
Natural Frequency ◽  
Tensile Force ◽  
Tensile Load ◽  
Free Vibrations ◽  
Tension Force ◽  
Main Element ◽  
Accelerometer Sensor ◽  
Simple Method ◽  
Long Span ◽  
Axial Tensile

Cable is the main element in a long span structure and is often used for special structures such as long span bridges, roofs and other structures that require a long span. The stiffness of the cable is determined by the amount of axial tensile force acting on the cable, and hence, the magnitude of the actual tensile force on the cable is an important factor to be determined and monitored. One simple method for determining the actual tensile force on a cable is to calculate the tensile force from the first natural frequency of the cable. However, it is important to ensure that the formulas used to calculate the tensile force are accurate. This research aims to determine the level of accuracy and the factors that influence the accuracy of the formula to determine the tension force of the cable from the natural frequency value of the cable. The methodology used in this research project was by applying free vibrations to the cable with given axial tensile load and measuring the acceleration that occurred with an accelerometer sensor. By using Fast Fourier Transform (FFT), the natural frequency value of the cable can be calculated and the actual tensile strength in the cable can be determined. From the experiment conducted, it was found that the length of the cable affects the accuracy of the measurement of the natural frequency and the magnitude of tensile force of the cable. The strain that occurs on the cable plays a very important role to the accuracy of the formulas used.

scholarly journals The Mechanical Behavior of Grouted Sleeve Splice Connections with and without Mechanical Interlocking Ring Under Axial Tensile Load

2019 ◽  
Vol 9 (2) ◽  
pp. 467-476
Author(s):  
Abdallh M. Soliman ◽  
◽  
Hatem H. Ibrahim ◽  
Hossam A. Hodhod ◽  
◽  
...  
Keyword(s):  
Bond Strength ◽  
Mechanical Behavior ◽  
Research Work ◽  
Tensile Load ◽  
Confining Pressure ◽  
Basic Material ◽  
Bond Behavior ◽  
Axial Tensile ◽  
Steel Sleeve ◽  
Sleeve Wall

This research work thus presents rational procedure to design a grouted sleeve splice connection using a basic material such as standard pipes with little workmanship this provides the design with a good advantage in comparison to just using selection tables for costly proprietary similar connection. The mechanical behavior of such splices is a function of two important mechanisms: the bar-to-grout bond behavior and the sleeve-to-grout bond behavior. To accomplish the goal of this examination work, three arrangements with an all-out number of 66 grouted splice sleeve specimens were fabricated and tested under incremental axial tensile load. The specimens were preliminary designed according to the equations available in the literature to determine the initial sleeve dimensions. Different parameters have been examined, namely: grout compressive strength, bar embedded length, bar diameter, sleeve inner diameter, sleeve wall thickness and sleeve configuration. The examined parameters provide to have a significant impact on the mechanical behavior of the grouted splices. Considering the results, it was clear that steel bars with 18 mm, 25 mm and 32 mm diameter and 044 Mpa yield stress can be adequately spliced and the tensile strength can be reached. The steel sleeve to the grouted splice sleeve connectors significantly improve the bar-to-grout bond strength through the confinement action added by the sleeve wall. Also welding interlocking steel rings can prevent the grout-to-sleeve bond Failure. Feasibility study for tested grouted sleeves reporting their adequacy in accordance with the code provisions of ACI 318-14[1] and ECP 203-2018[5] is presented. Moreover, design equations capturing the parameters affecting the bond strength, the confining pressure, and the required embedment length are derived.

Sign in / Sign up

Export Citation Format

Share Document