Environmental stress analysis of the aviation hydraulic pipeline effected by the hydraulic pressure

The Stress Analysis for the Trenchless Pipeline Rehabilitation

Volume 5: High Pressure Technology, Nondestructive Evaluation, Pipeline Systems, Student Paper Competition ◽

10.1115/pvp2005-71058 ◽

2005 ◽

Author(s):

Kuang-Chyi Lee ◽

Rong-Yuan Jou ◽

Hsin Her Yu ◽

Yuan-Cheng Liang ◽

Chien-Chang Lin

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Stress Analysis ◽

Heavy Traffic ◽

Element Model ◽

Hydraulic Pressure ◽

Optimal Thickness ◽

Plastic Sheet ◽

Different Types ◽

The Finite Element Model

Most of the pipelines will get aging year after year and then they will need to be rehabilitated. Because of the heavy traffic on the ground or the congested pipelines under the ground, the replacement of old pipes will be very difficult in the cities. The dig-free (trenchless) method is a revolutionary pipelining method which uses air pressure, hydraulic pressure or mechanical drag force to pull the flexible piping plastic sheet into the old pipe. This research proposes a stress analysis for trenchless pipeline method by the finite element model with CATIA. The material of piping sheet is combined of two different types of epoxy with the anionic harder. We do the stress analysis of the trenchless rehabilitated pipelines to decide the optimal thickness of flexible piping plastic sheet and whether the material is available or not by finite element method.

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Remote sensing role in environmental stress analysis: Eаst Serbia wildfires case study (2007-2017)

Journal of the Geographical Institute Jovan Cvijic SASA ◽

10.2298/ijgi1703249p ◽

2017 ◽

Vol 67 (3) ◽

pp. 249-264 ◽

Cited By ~ 2

Author(s):

Ivan Potic ◽

Nina Curcic ◽

Milica Potic ◽

Milan Radovanovic ◽

Tatiana Tretiakova

Keyword(s):

Remote Sensing ◽

Environmental Stress ◽

Stress Analysis

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

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.385-387.169 ◽

2008 ◽

Vol 385-387 ◽

pp. 169-172 ◽

Cited By ~ 1

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.

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