Mechanical Analysis of Glass Reinforced Plastics Bolt Flanged Connection With Elastomeric Seals

2002 ◽  
Author(s):  
Hubert Mallard ◽  
Charlotte Landry ◽  
Yves Birembaut
Keyword(s):  
Steel Structures ◽  
Mechanical Analysis ◽  
Element Analysis ◽  
Reinforced Plastics ◽  
The Finite Element Analysis ◽  
Numerical Tools ◽  
Piping Networks ◽  
Elastomeric Seals ◽  
Data Design

The pressure vessel industry can now propose piping networks made of Glass Reinforced Plastics. This technology has advantages, lesser weight, resistance to corrosion… The most important drawback problem is the lack of industrial references, standards, sizing of these structures needs an approach different from that used for more conventional steel structures and has to be put in a specific part of a code linked to standard steel codes re´f. 1. The sizing can use conventional numerical tools like the finite element analysis but needs a good knowledge of the materials as well as an adapted calculation Code. In Europe, projects try to give theorica, tests data, design consideration, informations to be able to build standards, for example “Design of GRP Flanges and Tests to Verify the Design and to Determine Long-Term Properties of GRP Pipes”. This paper shows examples of such mechanical analysis done on GRP flanges.

Analysis and Optimal Design on Electrical Dust Precipitator Steel Structures

2012 ◽  
Vol 538-541 ◽  
pp. 3249-3252
Author(s):  
Yang Gao ◽  
Lu Yu Huang ◽  
He Zhang
Keyword(s):  
Optimization Design ◽  
Solution Method ◽  
Reference Value ◽  
Steel Structures ◽  
Computational Method ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Method Optimization ◽  
Dust Precipitator ◽  
Electrical Precipitator

By using the finite element analysis software ANSYS, this article presented the structure stress and displacement of a type of electrical dust precipitator on a variety of loads effect, after the main steel structures of the model was built according to the frontal solution method, optimization design of model's main steel structures had been done. The modeling and the computational Method has been proved the reasonableness of precision, and can be further used for structure analysis and so it has reference value for optimization design of other electrical precipitator steel structures.

Finite Element Numerical Analysis of the LGV Frame Based on ANSYS

2012 ◽  
Vol 590 ◽  
pp. 487-491
Author(s):  
Qin Man Fan
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Mechanical Analysis ◽  
Structure Design ◽  
Frame Structure ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Static And Dynamic Characteristics ◽  
The Finite Element Analysis ◽  
Optimizing Design

The frame is the main part of the force matrix of truck vehicle and the stress state is complex and difficult to design. The finite element method is more accurate for the analysis of the static and dynamic characteristics of the frame, which provide guidance for the frame structure design. Establish finite element model of the frame with the application of ANSYS. According to the mechanical analysis of the model, impose reasonable constraints and load, the most typical of the four conditions in the frame is calculated with the finite element analysis, and predicted the weak parts of the frame according to the frame stress-strain cloud, which provided a very important theoretical basis for the improvement of the frame structure of the frame and optimizing design of the frame.

scholarly journals Finite Element Analysis for Whole Machine of Link-Type Ladle Turret

2011 ◽  
Vol 2-3 ◽  
pp. 861-864
Author(s):  
Ling Ling Li ◽  
Guang Pu Xu ◽  
Bing Bing Cui
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Molten Steel ◽  
Mechanical Analysis ◽  
Maximum Displacement ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Capacity Calculation ◽  
Dip Angle

The mechanism withstands 220t high temperature molten steel. In case of damage, molten steel pours. There will be major security incidents. Therefore, it is necessary to calculate carrying capacity of the mechanism. However, the part of components of the mechanism is made up of a crisscross of steel plate. This is used to withstand the bending and stretching. If we rely on traditional mechanical analysis, a large number of simplifying must be adopted, and accuracy of the calculation can be reduced. Therefore, this paper uses the COSMOSWorks Plug-in of SolidWorks software to carry out finite element calculation of whole machine for the mechanism. It avoids these shortcomings mentioned above. And this makes bearing capacity calculation to be more close to the actual circumstances. And the results show that: (1) the maximum stress of parts in the mechanism is only 52.8Mpa and much less than permissible stresses of its materials. As a result, the mechanism has sufficient bearing capacity. (2) The maximum displacement of whole machine is 2.637 mm. And the displacement will cause dip angle when lifting molten steel and it is less than its allowable stiffness. Therefore, the deformation is to meet requirements for the mechanism. In conclusion, the finite element analysis of the whole machine avoids complex force analysis and simplification of structure. The calculation has high accuracy. It is one of effective methods in the design of intensity and stiffness of complex structures.

scholarly journals Damage Identification of Continuous Rigid Frame Concrete Bridge

2014 ◽  
Vol 8 (1) ◽  
pp. 193-200
Author(s):  
Shengnan Huang ◽  
Lieping Ye ◽  
Xinzheng Lu
Keyword(s):  
Damage Accumulation ◽  
Damage Identification ◽  
Concrete Bridge ◽  
Element Analysis ◽  
Fea Model ◽  
Rigid Frame ◽  
The Finite Element Analysis ◽  
Mode Method ◽  
Different Levels

During a bridge service life, many factors can cause damage accumulation such as overloaded traffic, fatigue effect, and so on. Hence, the identification of potential damages has been received wide attention to prevent such sudden fatal accident. An experiment of a continuous rigid frame concrete bridge, which had 3 spans and a total length of 18 meters, was presented in this paper. Two load stages and ten different load steps were simulated to test various scenario of long-term loading and different levels of overload. Curvature mode method was adopted to detect the damage during the exercises. The changes of curvature modes were used to detect damage after the ten load steps. This method performed excellent to identify the damage position of the bridge. So, it is concluded that the curvature modes can be used to detect damage in actual structures. In addition, the Finite-Element Analysis (FEA) was utilized, and the experimental recurring was verified positively through FEA model.

Preparation and Mechanical Properties Analysis of Aviation Mechanical Carbon Fiber Reinforced Plastics

2021 ◽  
Vol 871 ◽  
pp. 234-239
Author(s):  
Sheng Li Yan ◽  
Hao Li ◽  
Fei Zhan
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
3D Model ◽  
Element Analysis ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
The Finite Element Analysis ◽  
Fiber Reinforced Plastics ◽  
Ansys Workbench

The study aims to explore the preparation of aviation mechanical carbon fiber reinforced plastics (CFRP) and the properties of CFRP composites. Taking the aero box body as an example, the mechanical properties of CFRP are studied. The preparation of CFRP is analyzed by searching the data. CFRP plates are explored according to the stress analysis of composite materials. The finite element analysis software ANSYS Workbench and UG software are adopted to build the 3D model of the aero box body. After adding materials in ANSYS Workbench and simplifying the UG model, the finite element analysis of the model is carried out by computer. The 3D model of the aero box is constructed, the finite element analysis of the aero box is carried out, and the mechanical properties of CFRP are explored. In this study, the possibility of the practical application of CFRP in the aviation box body lightweight is clarified, which gives a direction for the subsequent actual molding and guides the application of CFRP in aviation field.

Mechanical Analysis of Restored-Tooth Structure Due to Polymerization Shrinkage of Composite Restoration

2011 ◽  
Vol 474-476 ◽  
pp. 1401-1405
Author(s):  
Shui Wen Zhu ◽  
Jian Ping Fan ◽  
Guo Ping Chen
Keyword(s):  
Material Properties ◽  
Development Trend ◽  
Mechanical Analysis ◽  
Elastic Behaviour ◽  
Element Analysis ◽  
Polymerization Shrinkage ◽  
Tooth Structure ◽  
The Finite Element Analysis ◽  
The Development Trend ◽  
Composite Restoration

The finite element analysis is presented in this paper in order to investigate the influence of interphase properties on restored-tooth structure due to polymerization shrinkage of resin-based composite. The restoration-tooth interface is simulated using plane elements of varying material properties and thicknesses. The stress and displacement within restored-tooth structure built-up from the polymerization shrinkage of the restorative composite were computed accounting for the time-dependent, visco-elastic behaviour of the composite. It was found that a correlation exists between material and geometry properties at the restoration-tooth interface and higher shrinkage stresses on interphase due to polymerization shrinkage. The development trend of residual stress from polymerization shrinkage in the restored-tooth structure was discussed and forecasted.

RESEARCH ON PERFORMANCE OF DIAMOND BLADE IN DICING SAW BASED ON ANSYS METHOD

2012 ◽  
Vol 11 (02) ◽  
pp. 125-133
Author(s):  
YAN MA
Keyword(s):  
Tangential Stress ◽  
Equivalent Stress ◽  
Mechanical Analysis ◽  
Maximum Tangential Stress ◽  
Grinding Wheel ◽  
Analysis Software ◽  
Element Analysis ◽  
Rotating Speed ◽  
Diamond Blade ◽  
The Finite Element Analysis

Mechanical analysis is performed on the diamond blade in the dicing saw, and the tangential and radial stresses are presented. The maximum tangential stress and the critical rotating speed to the destructive moment of the grinding wheel are determined. With the finite element analysis software ANSYS, the model of grinding wheel diamond blade is studied and the equivalent stress nephogram with different speeds is presented. The simulation results demonstrate that the tangential stress is larger than the radial stress and that the maximum tangential stress happens on the inner surface. Moreover, the movement trend of curve of the maximum tangential stress nearly corresponds to the theoretical curve.

Stress—Strain Fields in Compressed Elastomeric Seals and Their Extension to Fracture Mechanics

1986 ◽  
Vol 59 (5) ◽  
pp. 709-721 ◽  
Author(s):  
Gianluca Medri ◽  
Antonio Strozzi
Keyword(s):  
Fracture Mechanics ◽  
Pressure Profile ◽  
Mechanical Analysis ◽  
Integral Approach ◽  
J Integral ◽  
Elastomeric Materials ◽  
Viscoelastic Effects ◽  
Numerical Tools ◽  
Experimental Findings ◽  
Elastomeric Seals

Abstract The modeling of an elastomer in terms of hyperelastic material has been discussed. The peculiarities of the finite element method when applied to nearly incompressible materials have been underlined. The mechanical analysis of various uncracked elastomeric seals has been treated with particular regard to possible crack initiation. The theoretical aspects of fracture mechanics applied to elastomers have been discussed, and the validity of the J-integral approach has been checked against experiments. The J-integral has been computed numerically in cracked O-ring seals for various fractional compressions and crack lengths. The numerical stress field has been compared to the experimental findings. The influence of the crack length on the contact pressure profile has been considered. Various difficulties still exist in modeling efficiently the elastomeric materials and in developing suitable numerical tools. Nevertheless, it is believed that statistical predictions on the debasement in the sealing characteristics due to viscoelastic effects and to crack propagation will become shortly feasible.

The Pole Design of 500kV Centrifugal Concrete Filled Thin-Wall Steel Tubular Structures

2014 ◽  
Vol 680 ◽  
pp. 175-178
Author(s):  
Yu Zhuo Jia ◽  
Chuan Hui Zhang
Keyword(s):  
Transmission Lines ◽  
Mechanical Performance ◽  
Bending Moment ◽  
Thin Wall ◽  
Tubular Structures ◽  
Double Pole ◽  
Element Analysis ◽  
Long Term Effect ◽  
The Finite Element Analysis

According to the existing specifications, devise door type double pole of 500kV centrifugal concrete filled thin-wall steel tubular structures, and use the finite element analysis software ANSYS to simulate the pole.The results show that the mechanical performance of door type double pole is fine, can bear the maximum bending moment of roots of the pole well.The safety degree in the long term effect under the load is high,can be used in the 500kV transmission lines. In the technical and economic aspect, construction of centrifugal concrete filled thin-wall steel tubular structures pole is convenient,cover an area of an area small,economic and reasonable.

Methods to Increase the Rigidity of the C-Frame of a Press

2013 ◽  
Vol 371 ◽  
pp. 183-187 ◽  
Author(s):  
Ioan Dan ◽  
Romeo Cioară
Keyword(s):  
Energy Consumption ◽  
3D Models ◽  
Analytical Models ◽  
Design Solution ◽  
Favourable Effect ◽  
Element Analysis ◽  
The Press ◽  
The Finite Element Analysis ◽  
Reference Design

Reducing exploitation energy consumption for any technical system is an effective way, which is in complete accordance with the concept of sustainable development [1]. The presses, particularly the mechanical ones, are machine tools with a long-term exploitation [2]. At these ones, the operating energy consumption, significant in value, decreases only if the rigidity of the structure of resistance increases, including that of the frame. Several analytical models, developed and studied by the authors, confirmed the hypothesis that a solution to increase the rigidity of a mechanical press with open frame is obtained by shortening it. Moreover, it occurs also a slight decrease in material consumption integrated into the frame, which is a favourable effect. There have been developed more new constructive solutions [3, 4], characterized by minimal changes to the reference design solution, that of the press frame PAI 25. The new suggested constructive solutions are obtained as 3D models, accomplished in Pro Engineer Wildfire 4, and the finite element analysis was made in Catia V5 R16. The present paper shows results on increasing stiffness and reducing stress state for a few constructive solutions of shortened C-frame, having reduced distance between the working surface of the table and the spindle bore axis.

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