scholarly journals FEM Analysis for Sealing Performance of Hydraulic Pressure Brake Hose Caulking Portion

2011 ◽  
Vol 5 (9) ◽  
pp. 484-494 ◽  
Author(s):  
Nao-Aki NODA ◽  
Shinpei YOSHIMURA ◽  
Hirofumi KAWAHARA ◽  
Masakazu TSUYUNARU
Keyword(s):  
Fem Analysis ◽  
Hydraulic Pressure ◽  
Sealing Performance

FEM Analysis for Sealing Performance of Hydraulic Pressure Brake Hose Caulking Portion

2008 ◽  
Vol 385-387 ◽  
pp. 169-172 ◽  
Author(s):  
Hirofumi Kawahara ◽  
Shinpei Yoshimura ◽  
Naoaki Noda
Keyword(s):  
Stress Analysis ◽  
Radial Direction ◽  
Permanent Deformation ◽  
Fem Analysis ◽  
Initial Deformation ◽  
Hydraulic Pressure ◽  
Normal Stresses ◽  
Power Steering ◽  
High Durability ◽  
Sealing Performance

Usually, development of automobile brake hose and power steering hose has been realized through evaluating several actual prototype hoses experimentally. Recently, high durability and high development effect for brake hose has been required because periodic exchange for the brake hose has not been requested any more. In this study, therefore, stress analysis by FEM is performed to the crimped portion of hydraulic pressure brake hose in order to promote the development of the automobile hoses more efficiently. It is found that large normal stresses σr in the radial direction appear at the crimped portion between the nipple and inner rubber. The results suggest that several grooves on the nipple surface may be useful because they cause large σr, which may improve the sealing performance. The effect of permanent deformation of the rubber on the sealing performance is discussed by assuming initial deformation of the rubber at the crimped portion.

FEM Stress Analysis and Sealing Performance in Pipe Flange Connections With Adhesive Subjected to Internal Pressure and External Bending Moments

2005 ◽  
Author(s):  
Masahide Katsuo ◽  
Toshiyuki Sawa ◽  
Yuki Kikuchi
Keyword(s):  
Internal Pressure ◽  
Stress Analysis ◽  
Bending Moment ◽  
Fem Analysis ◽  
Bending Moments ◽  
3 Dimensional ◽  
Leakage Test ◽  
Sealing Performance ◽  
Flange Thickness ◽  
Good Agreement

This study deals with the stress analysis and the estimation of sealing performance of the pipe flange connections with an adhesive under an internal pressure and an external bending moment are analyzed by using the 3-dimensional elastic finite element method (FEM). The experiment of the leakage test of the connections with an adhesive was carried out by applying the above loads to the connections. From the FEM analysis, the following results were obtained; (1) when an internal pressure is applied to the flange connections, the compressive stress at the interface between a flange and an adhesive increases proportionally from the inner side of the interface to outside, and (2) when an internal pressure and a bending moment apply to the flange connections, the stress distribution at the half part of the interface increases as the external bending moments increase and also Young’s modulus of the adhesive increases. From the experiments, the following results were obtained: (1) sealing performance of the pipe flange connections with an adhesive under an internal pressure and an external bending moment increases as the flange thickness and an initial clamping force of bolts increases and (2) the sealing performances were not found between the connections with an adhesive and that with a gasket combining an adhesive. Furthermore, the numerical results are in fairly good agreement with the experimental results.

109 FEM Analysis for Sealing Performance of Hydraulic Brake Hose Caulking Portion

2007 ◽  
Vol 2007 (0) ◽  
pp. 17-18
Author(s):  
Nao-Aki NODA ◽  
Hirofumi KAWAHARA ◽  
Shinpei YOSIMURA ◽  
Sho-Ichi TSUYUNARU
Keyword(s):  
Fem Analysis ◽  
Hydraulic Brake ◽  
Sealing Performance

OS1422 FEM Analysis for Sealing Performance of Hydraulic Brake Hose Crimped Portion and Its Life Estimation

2008 ◽  
Vol 2008 (0) ◽  
pp. _OS1422-1_-_OS1422-2_
Author(s):  
Hirofumi KAWAHARA ◽  
Nao-Aki NODA ◽  
Shinpei YOSHIMURA ◽  
Kento OTA
Keyword(s):  
Fem Analysis ◽  
Life Estimation ◽  
Hydraulic Brake ◽  
Sealing Performance

FEM Analysis and Evaluation of the Sealing Performance in Flexible Box-Shape Flanged Bolted Joints With Gaskets Subjected to Internal Pressure: Effect of the Bolt Pitch

2007 ◽  
Author(s):  
Toshiyuki Sawa ◽  
Ryo Kurosawa ◽  
Yasuaki Tatsumi
Keyword(s):  
Internal Pressure ◽  
Fem Analysis ◽  
Bolted Joints ◽  
Stress Distributions ◽  
The Finite Element Method ◽  
Analysis And Evaluation ◽  
Flange Connection ◽  
Sealing Performance ◽  
Helium Gas ◽  
Bolted Flange

Bolted joints with gaskets such as non-circular flange connections have been widely used in mechanical structures, nuclear and chemical industry, and so on. They are usually used under internal pressure as well as other loadings such as thermal, impact loadings and so on. In designing the non-circular flange connections with gaskets, it is important to evaluate the sealing performance of the non-circular flange connections with gaskets subjected to internal pressure. An important issue is how to evaluate the sealing performance in the box-shape bolted flange connections by using the contact gasket stress distributions at the interfaces, how to reduce a number of bolt and nuts, that is, how to enlarge the bolt pitch, and how to determine the initial clamping bolt force (preload) by using the new gasket constants. In this paper, the stresses of box-shape flange connection with gaskets subjected to an internal pressure are analyzed using the finite element method (FEM), taking account a hysteresis in the stress-strain curves of the gasket. The contact gasket stress distributions when the internal pressure is applied to the connection are analyzed. The leakage tests were conducted using an actual box-shape flange connection with a gasket Using the contact gasket stress distributions at the interfaces under an internal pressure (Helium gas was used) and the amount of the leakage measured in the experiment, the sealing performances are evaluated experimentally and theoretically by changing the bolt pitch in the connections. Discussion is made on the effect of the bolt pitch on the sealing performance in the above connections.

Finite Element Stress Analysis and Evaluation of the Sealing Performance in Pipe Fittings With Adhesive for Threaded Connections Under Internal Pressure and Bending Moment

2005 ◽  
Author(s):  
Mitsutoshi Ishimura ◽  
Masahide Katsuo ◽  
Toshiyuki Sawa ◽  
Masamichi Serizawa
Keyword(s):  
Finite Element ◽  
Internal Pressure ◽  
Stress Analysis ◽  
Compressive Stress ◽  
Bending Moment ◽  
Fem Analysis ◽  
Pipe Fitting ◽  
3 Dimensional ◽  
Threaded Connections ◽  
Sealing Performance

In practice, PTFE tape is being used for sealing of a pipe fitting. However, the efficiency, the decrease in work time, and the sealing performance can be improved by using adhesive instead of the tape. When such a pipe fitting is under an internal pressure and external bending moment by an internal fluid and others, however, an influence in the sealing performance is taken by how to use an adhesion. This study deals with the stress analysis and the evaluation of the sealing performance of the pipe fitting with an adhesive under an internal pressure and an external bending moment analyzed by using the 3-dimensional elastic finite element method. Furthermore, the experiment of the leakage test of the pipe fitting with an adhesive was carried out when the above loads were applied to the pipe fitting. From 3-D FEM analysis, the following results were obtained: (1) the stress distribution at the interface between thread and adhesive on the side of the internal pressure is tensile stress, and stress on the opposite side is compressive, (2) the stresses at the area of the clearance between the valley of the screw and the mountain increase as the numbers of turns of the thread in fittings increase, and (3) the compressive stress at the side of the tensile part in the fittings decrease as the external bending moments increase. However, the sealing performance will not change when the bending moment is not so great because the compressive stress at the side of the compressive part in the fitting increases. From the leakage tests, the following results of the sealing performance were obtained: (1) the sealing performance of a fittings with adhesive under an internal pressure and a bending moment didn’t decrease when bending moment was not so great, and (2) when it exceeds fixed pressure, rapid leakage from the fitting with adhesive occurred by the exfoliation of the adhesive. Furthermore, the numerical results are in fairly good agreement with the experimental results.

Indirect Pressure Measurement on Hydraulic Components Through New MEMS Strain Sensors

2017 ◽  
Author(s):  
Massimiliano Ruggeri ◽  
Giorgio Paolo Massarotti ◽  
Luca Belsito ◽  
Alberto Roncaglia
Keyword(s):  
Pressure Measurement ◽  
Early Stage ◽  
Pressure Sensors ◽  
Fem Analysis ◽  
Hydraulic Pressure ◽  
Hydraulic Systems ◽  
High Precision Measurement ◽  
Flow Modification ◽  
Mems Technology ◽  
New Sensors

Sensors are playing a more important role in the modern hydraulic systems. Increasing needs for closed loop controls, high precision measurement, power control and energy monitoring, diagnosis and safety concerns, ask for both pressure and flow acquisition in both industrial and mobile applications. Traditional pressure sensors need specific bored screw for mounting, and both pipes and components must be modified in order to apply pressure sensors. Traditional pressure sensors are related to mini-mess and to oil flow modification in the sensor area. Sensors position in hydraulic circuits or components must be defined at design phase, in order to design the proper screw in desired circuit positions. Most of times sensors result in a efficiency loss in the circuit. Last but not least, the cost of traditional sensors, the need for proper connections for sensors installation and the work needed for sensor placement in machines production phase, could be avoided if sensors could be integrated in smart components. Modern Silicon based technologies offer new solutions for a less invasive pressure measurement. Micro Electro-Mechanical Systems (MEMS) Technology is suitable to design new sensors for indirect pressure measurement. Also traditional technologies, coupled with modern electronics could offer solutions that were not enough precise 10 years ago, but presenting some tricks to be solved accurately. The paper presents the first experimental results of the early stage of application of a MEMS strain gauge sensor application on components, where hydraulic pressure is measured through the component strain due to internal pressure force and component deformation. New sensors called Double Ended Tuning Fork (DETF) MEMS Resonant Extensometer sensor, based on a silicon diapason made in void environment in a system on chip will be applied at components due to the sensor’s sensitivity and precision that can reach the 0,15 nε/ε. At the same time the paper will show that pipes offer a deformation function of the mechanical characteristics and that the pressure effect is causing a deformation that can be even too high for the MEMS sensor. The strain position sensor and component deformation are also proved by the FEM analysis in order to validate both pressure measurement and FEM analysis in respect to test bench results applied to the sensor strain acquisition.

Structure Design and Analysis of a Locking Band Type Quick Opening End Closure Using a New Saddle-Shaped Sealing Ring for Natural Gas Filters

2015 ◽  
Author(s):  
Ping Chen ◽  
Shumin Zhou ◽  
Ying Shi
Keyword(s):  
Natural Gas ◽  
Stress Test ◽  
Fem Analysis ◽  
Steel Structure ◽  
Structure Design ◽  
National Standard ◽  
Internal Diameter ◽  
Sealing Performance ◽  
Natural Gas Transmission ◽  
Sealing Ring

A quick opening closure using a new rubber sealing ring was proposed in this paper, which can be used in natural gas transmission filters. An innovative saddle-shaped sealing ring with the feature of floatability was designed for substituting of traditional rubber C-ring. A lager gap could be allowed between the door and the top flange which made the assembling and disassembling easier than before. The theory of strength calculation and check for the whole steel structure were also presented. For an actual engineering case, a device with internal diameter of DN1550 (62inches) and design pressure of 12.6MPa (1827.5psi) was designed by rule according to Chinese national standard GB150 and analyzed by FEA (ANASYS). In addition, the sealing performance was simulated by FEM analysis (ABAQUS). Finally, the prototype was produced and the experiments for its sealing and load-bearing performance using hydrostatic test and stress test were carried out successfully.

FEM Analysis of Plug Packer Based on the Model of Mooney-Rivlin

2011 ◽  
Vol 201-203 ◽  
pp. 326-331 ◽  
Author(s):  
Ce Zhang ◽  
Shi Min Zhang ◽  
Dai Geng ◽  
Jian Ming Zheng ◽  
Wen Bin Fan
Keyword(s):  
High Pressure ◽  
New Technology ◽  
Fem Analysis ◽  
The Core ◽  
Core Technology ◽  
Sealing Performance

The technology of Pipeline high-pressure intelligent isolation is a new technology which has been developed by Company PSI since the 1990’s, and the core technology, packer’s sealing performance has been blocked from then on. In this paper, we study the Polyurethane columns specimen of different hardness though ANSYS, then fit with the curve from the experiments, in order to get the Polyurethane columns’ Mechanical constants of Model Mooney-Rivlin. Calculate the deformation between two statuses, then according to isolation pressure and anti-convexity of packer we choose the packer of appropriate hardness. Finally, analysis the packer under different pressure, get the working curve of isolation ability, and the outlet can be used in the design of packer.

Sign in / Sign up

Export Citation Format

Share Document