Numerical Study on the Static Response of Grouting-Sleeve Reinforcement-Connection Component under Axial Tension Load

2013 ◽  
Vol 353-356 ◽  
pp. 3312-3315
Author(s):  
Fan Gu ◽  
Tao Gao Wu ◽  
Wei Jian Zhao ◽  
Xin Dui
Keyword(s):  
Numerical Simulation ◽  
Mechanical Property ◽  
Numerical Study ◽  
Element Model ◽  
Static Response ◽  
Actual Structure ◽  
Axial Tension ◽  
Tension Load ◽  
Grouting Material ◽  
Connection Component

According to the actual structure of grouting sleeve, the ABAQUS finite element model of grouting-sleeve reinforcement-connection component under axial tension load was established, and the stress distribution at reinforcement, grouting material and sleeve were gotten. Numerical simulation shows that the compressive cones in grouting material are formed to transfer load between reinforcement and sleeve. Moreover, simulation indicates that mechanical property of grouting material is the most important factor for the physical reliability of reinforcement connection.

Numerical Study on the Influence of Sleeve-Rib Space on the Static Response of Grouting-Sleeve Reinforcement-Connection Component

2013 ◽  
Vol 477-478 ◽  
pp. 701-704
Author(s):  
Fan Gu ◽  
Tao Gao Wu ◽  
Wei Jian Zhao ◽  
Xin Dui ◽  
Peng Zhang
Keyword(s):  
Maximum Stress ◽  
Numerical Study ◽  
Element Model ◽  
Internal Force ◽  
Static Response ◽  
Work Condition ◽  
Actual Structure ◽  
Axial Tension ◽  
Grouting Material ◽  
Connection Component

According to the actual structure of grouting sleeve, the ABAQUS finite element model of grouting-sleeve reinforcement-connection component was established. By changing sleeve-rib space, the influence of sleeve-rib space on the stress and the displacement distribution at grouting material were gotten. Numerical simulation shows that with the decrease of sleeve-rib space, the internal force distribution of grouting material tends to be uniform. Under axial tension load, with the sleeve-rib space of 14mm, the maximum stress of grouting material is lower than its strength, which makes grouting-sleeve reinforcement-connection component to be in a stable work condition.

Numerical Study on the Static Response of Grouting-Sleeve Reinforcement-Connection Component with Different Sleeve-Rib Space

2014 ◽  
Vol 578-579 ◽  
pp. 882-885
Author(s):  
Fan Gu ◽  
Peng Zhang ◽  
Wei Jian Zhao ◽  
Duo Zhang
Keyword(s):  
Mechanical Performance ◽  
Numerical Study ◽  
Internal Force ◽  
Finite Element Models ◽  
Stress Distributions ◽  
Static Response ◽  
Actual Structure ◽  
Axial Tension ◽  
Grouting Material ◽  
Connection Component

According to the actual structure, the ABAQUS finite element models of grouting-sleeve reinforcement-connection component with different sleeve-rib space were established, and the mechanical performance of component under the action of axial tension load was studied. Meanwhile, the stress distributions among sleeve with six kinds of sleeve-rib space by means of stress nephogram were obtained. Numerical simulation result shows that with the sleeve-rib space decreasing from 56mm to 8mm, the constraint capability of grouting material on reinforcement is better and better, and the internal force distribution in sleeve tends to be more homogeneous.

scholarly journals Experimental and Numerical Study on the Protective Behavior of Weldox 900 E Steel Plates Impacted by Blunt-Nosed Projectiles

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 141
Author(s):  
Yahui Shi ◽  
Ang Hu ◽  
Taisheng Du ◽  
Xinke Xiao ◽  
Bin Jia
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Fracture Criterion ◽  
Numerical Study ◽  
Mesh Size ◽  
High Strength ◽  
Element Model ◽  
Steel Plates ◽  
Protective Behavior ◽  
The Finite Element Model

To demonstrate the importance of incorporating Lode angle into fracture criterion in predicting the penetration resistance of high-strength steel plates, ballistic tests of blunt-nosed projectiles with a diameter of 5.95 mm impacted 4 mm thick Weldox 900 E steel plates were conducted. Impacting velocity range was 136.63~381.42 m/s. The fracture behavior and the ballistic limit velocities (BLVs) were obtained by fitting the initial-residual velocities of the projectiles. Subsequently, axisymmetric finite element (FE) models parallel to the tests were built by using Abaqus/Explicit software, and the Lode-independent Johnson–Cook (JC) and the Lode-dependent ASCE fracture criterion were incorporated into the finite element model for numerical simulation. Meanwhile, to verify the sensitivity of the mesh size in the numerical simulation, different mesh sizes were used in the shear plug area of the target. It can be found that Weldox 900 E steel has obvious mesh size sensitivity by comparing the experimental results and numerical simulation, and the JC fracture criterion and the ASCE fracture criterion predicted similar BLV for the same mesh size.

Analysis of Sealing Ability of Premium Tubing Connection under Axial Alternating Tension Load

2013 ◽  
Vol 634-638 ◽  
pp. 3569-3572 ◽  
Author(s):  
Yi Hua Dou ◽  
Xing Wang ◽  
Yang Yu ◽  
Xiang Tong Yang
Keyword(s):  
Contact Pressure ◽  
Equivalent Stress ◽  
Element Model ◽  
Linear Elastic ◽  
Axial Tension ◽  
Inner Pressure ◽  
Tension Load ◽  
Sealing Ability ◽  
Maximum Equivalent Stress ◽  
Maximum Contact

In order to know the sealing ability under axial alternating tension load, a 88.9mm×6.45mm P110 premium tubing connection is established with multiple linear elastic plastic finite element model, stress and contact pressure on sealing surface and torque shoulder are analyzed under axial alternating tension load and 80 MPa inner pressure. The results show that tubing connection slide by the axial tension, while the maximum contact pressure on seal surface reduced. With the increasing of alternating cycle, the maximum equivalent stress on seal surface increased and the maximum contact pressure on seal surface decreased. And, under limited loads, contact pressure on torque shoulder is affected little caused by alternating load.

scholarly journals Experimental and Numerical Study on the Packing Densification of Metal Powder with Gaussian Distribution

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1401
Author(s):  
Huadong Yang ◽  
Shiguang Li ◽  
Zhen Li ◽  
Fengchao Ji
Keyword(s):  
Numerical Simulation ◽  
Packing Density ◽  
Simulation Analysis ◽  
Numerical Study ◽  
Three Dimensional ◽  
Packed Bed ◽  
Element Model ◽  
Powder Particle Size ◽  
Metal Powders ◽  
Powder Packing

In the additive manufacturing of metal materials, powder bed fusion 3D laser printing is the most widely used processing method. The density of the packed bed is another important parameter that can affect the part quality; however, it is the least understood parameter and needs further study. Aiming at addressing the problem of the powder packing density in the powder tank before powder spreading, which is neglected in the existing research, a combination of numerical simulation and experimental research was used to analyze the powder particle size distribution, powder stiffness coefficient, and vibration condition. Considering the van der Waals forces between the powders, a discrete element model suitable for fine metal powders for 3D printing is proposed. At the same time, a mathematical model that takes into account the vibration state is proposed, and the factors affecting the density of the powder were analyzed. A self-designed and manufactured three-dimensional vibration test rig was used to conduct physical experiments on spherical metal powders with approximately Gaussian distributions to obtain the maximum densities. The results obtained by the numerical simulation analysis method proposed in this paper are in good agreement with the experimental results. The influence of the amplitude and vibration frequency on the powder packing density is the same; that is, it increases with an increase in amplitude or frequency, and then decreases with a further increase in amplitude or frequency after reaching the maximum. It is unreasonable to discuss the packing densification only relying on the vibration intensity. Therefore, it is necessary to combine the amplitude and frequency to analyze the factors that affect the packing density of powders.

Axial and Moment Carrying Capacity of Split Sleeve Grouted Connections for Repair of Tubular Members

2019 ◽  
Author(s):  
N. Vignesh Chellappan ◽  
S. Nallayarasu
Keyword(s):  
Numerical Simulation ◽  
Carrying Capacity ◽  
Parametric Study ◽  
Load Transfer ◽  
Element Model ◽  
Offshore Structures ◽  
Geometric Parameters ◽  
Axial Tension ◽  
Load Transfer Mechanism ◽  
Comprehensive Study

Abstract The tubular members damaged by ship impact or falling objects require repair and rehabilitation in offshore structures. The repair of damaged underwater tubular member using welding is hazardous and expensive and hence alternative connection methods such as grouted clamp techniques have been in use for many decades. The existing guideline on the design of grouted connections especially under axial tension and moment is very limited and requires further study. The load transfer mechanism of grouted clamps depends on various geometric parameters and bond between clamp and parent member. A comprehensive study on split sleeve grouted connection for load transfer between two parts of tubular members has been investigated and presented. Numerical simulation of split sleeve grouted connection has been carried out using finite element model of tubular member – sleeve through bond strength of grout. The numerical model has been validated using existing guidelines and further parametric study has been carried out. The parametric study includes geometric parameters such as diameter to wall thickness ratio of split sleeve, sleeve friction length, grout strength and grout shrinkage. The simulations have been carried out for combination of axial tension and moment loading.

scholarly journals Numerical simulation on coal loading process of shearer drum based on discrete element method

2021 ◽  
pp. 014459872110135
Author(s):  
Zhen Tian ◽  
Shuangxi Jing ◽  
Lijuan Zhao ◽  
Wei Liu ◽  
Shan Gao
Keyword(s):  
Numerical Simulation ◽  
Discrete Element Method ◽  
Loading Rate ◽  
Low Cost ◽  
Element Model ◽  
Discrete Element ◽  
Helix Angle ◽  
Loading Process ◽  
Coal Particles ◽  
Element Method

The drum is the working mechanism of the coal shearer, and the coal loading performance of the drum is very important for the efficient and safe production of coal mine. In order to study the coal loading performance of the shearer drum, a discrete element model of coupling the drum and coal wall was established by combining the results of the coal property determination and the discrete element method. The movement of coal particles and the mass distribution in different areas were obtained, and the coal particle velocity and coal loading rate were analyzed under the conditions of different helix angles, rotation speeds, traction speeds and cutting depths. The results show that with the increase of helix angle, the coal loading first increases and then decreases; with the increase of cutting depth and traction speed, the coal loading rate decreases; the increase of rotation speed can improve the coal loading performance of drum to a certain extent. The research results show that the discrete element numerical simulation can accurately reflect the coal loading process of the shearer drum, which provides a more convenient, fast and low-cost method for the structural design of shearer drum and the improvement of coal loading performance.

scholarly journals Numerical Modelling of Reinforced Concrete Slender Walls Subjected to Coupled Axial Tension–Flexure

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Xiaowei Cheng ◽  
Haoyou Zhang
Keyword(s):  
Reinforced Concrete ◽  
Plastic Hinge ◽  
Element Model ◽  
Lateral Loading ◽  
Design Parameters ◽  
Seismic Behaviour ◽  
High Rise ◽  
Ultimate Deformation ◽  
Axial Tension ◽  
Plastic Hinge Length

AbstractUnder strong earthquakes, reinforced concrete (RC) walls in high-rise buildings, particularly in wall piers that form part of a coupled or core wall system, may experience coupled axial tension–flexure loading. In this study, a detailed finite element model was developed in VecTor2 to provide an effective tool for the further investigation of the seismic behaviour of RC walls subjected to axial tension and cyclic lateral loading. The model was verified using experimental data from recent RC wall tests under axial tension and cyclic lateral loading, and results showed that the model can accurately capture the overall response of RC walls. Additional analyses were conducted using the developed model to investigate the effect of key design parameters on the peak strength, ultimate deformation capacity and plastic hinge length of RC walls under axial tension and cyclic lateral loading. On the basis of the analysis results, useful information were provided when designing or assessing the seismic behaviour of RC slender walls under coupled axial tension–flexure loading.

scholarly journals Development of Depth-Limited Wave Boundary Layers over a Smooth Bottom

2020 ◽  
Vol 9 (1) ◽  
pp. 27
Author(s):  
Hitoshi Tanaka ◽  
Nguyen Xuan Tinh ◽  
Xiping Yu ◽  
Guangwei Liu
Keyword(s):  
Numerical Simulation ◽  
Boundary Layer ◽  
Boundary Layers ◽  
Wave Motion ◽  
Numerical Study ◽  
Experiment Data ◽  
Tidal Motion ◽  
Long Period ◽  
Simulation Results ◽  
Wave Boundary

A theoretical and numerical study is carried out to investigate the transformation of the wave boundary layer from non-depth-limited (wave-like boundary layer) to depth-limited one (current-like boundary layer) over a smooth bottom. A long period of wave motion is not sufficient to induce depth-limited properties, although it has simply been assumed in various situations under long waves, such as tsunami and tidal currents. Four criteria are obtained theoretically for recognizing the inception of the depth-limited condition under waves. To validate the theoretical criteria, numerical simulation results using a turbulence model as well as laboratory experiment data are employed. In addition, typical field situations induced by tidal motion and tsunami are discussed to show the usefulness of the proposed criteria.

scholarly journals Development of a Novel Damage Detection Framework for Truss Railway Bridges Using Operational Acceleration and Strain Response

Vibration ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 422-445
Author(s):  
Md Riasat Azim ◽  
Mustafa Gül
Keyword(s):  
Damage Detection ◽  
Damage Identification ◽  
Numerical Study ◽  
Damage Index ◽  
Strain Analysis ◽  
Time History ◽  
Principal Component ◽  
Element Model ◽  
Railway Bridges ◽  
Truss Bridge

Railway bridges are an integral part of any railway communication network. As more and more railway bridges are showing signs of deterioration due to various natural and artificial causes, it is becoming increasingly imperative to develop effective health monitoring strategies specifically tailored to railway bridges. This paper presents a new damage detection framework for element level damage identification, for railway truss bridges, that combines the analysis of acceleration and strain responses. For this research, operational acceleration and strain time-history responses are obtained in response to the passage of trains. The acceleration response is analyzed through a sensor-clustering-based time-series analysis method and damage features are investigated in terms of structural nodes from the truss bridge. The strain data is analyzed through principal component analysis and provides information on damage from instrumented truss elements. A new damage index is developed by formulating a strategy to combine the damage features obtained individually from both acceleration and strain analysis. The proposed method is validated through a numerical study by utilizing a finite element model of a railway truss bridge. It is shown that while both methods individually can provide information on damage location, and severity, the new framework helps to provide substantially improved damage localization and can overcome the limitations of individual analysis.

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