New procedure of automatic modeling of pipelines with realistic shaped corrosion defects

2020 ◽  
Vol 221 ◽  
pp. 111030
Author(s):  
Júlio Tenório Pimentel ◽  
Adriano Dayvson Marques Ferreira ◽  
Renato de Siqueira Motta ◽  
Marco Antonio Figueiroa da Silva Cabral ◽  
Silvana Maria Bastos Afonso ◽  
...  
Keyword(s):  
Automatic Modeling ◽  
Corrosion Defects

A compact guided-wave EMAT with pulsed electromagnet for ferromagnetic tube inspection

2020 ◽  
Vol 64 (1-4) ◽  
pp. 951-958
Author(s):  
Tianhao Liu ◽  
Yu Jin ◽  
Cuixiang Pei ◽  
Jie Han ◽  
Zhenmao Chen
Keyword(s):  
Power Plants ◽  
Signal To Noise Ratio ◽  
Small Diameter ◽  
Performance Testing ◽  
Guided Wave ◽  
High Signal ◽  
Receiver Coil ◽  
Signal To Noise ◽  
Corrosion Defects

Small-diameter tubes that are widely used in petroleum industries and power plants experience corrosion during long-term services. In this paper, a compact inserted guided-wave EMAT with a pulsed electromagnet is proposed for small-diameter tube inspection. The proposed transducer is noncontact, compact with high signal-to-noise ratio and unattractive to ferromagnetic tubes. The proposed EMAT is designed with coils-only configuration, which consists of a pulsed electromagnet and a meander pulser/receiver coil. Both the numerical simulation and experimental results validate its feasibility on generating and receiving L(0,2) mode guided wave. The parameters for driving the proposed EMAT are optimized by performance testing. Finally, feasibility on quantification evaluation for corrosion defects was verified by experiments.

Monitoring Corrosion Defects in Oil Pipelines

2020 ◽  
Vol 42 (1) ◽  
pp. 1-9
Author(s):  
Hassan Sultan ◽  
Saria Ashry ◽  
Rania Mohamed
Keyword(s):  
Oil Pipelines ◽  
Corrosion Defects

Assessment on failure pressure of high strength pipeline with corrosion defects

2013 ◽  
Vol 32 ◽  
pp. 209-219 ◽  
Author(s):  
Bin Ma ◽  
Jian Shuai ◽  
Dexu Liu ◽  
Kui Xu
Keyword(s):  
High Strength ◽  
Failure Pressure ◽  
Corrosion Defects

scholarly journals A reconfiguration strategy for modular robots using origami folding

2018 ◽  
Vol 38 (1) ◽  
pp. 73-89 ◽  
Author(s):  
Meibao Yao ◽  
Christoph H. Belke ◽  
Hutao Cui ◽  
Jamie Paik
Keyword(s):  
Heuristic Algorithm ◽  
Minimum Energy ◽  
Computational Time ◽  
Modular Robots ◽  
Automatic Modeling ◽  
Minimum Energy Consumption ◽  
Modular Units ◽  
Optimal Reconfiguration ◽  
Algorithmic Framework ◽  
Modeling Algorithm

Reconfigurability in versatile systems of modular robots is achieved by changing the morphology of the overall structure as well as by connecting and disconnecting modules. Recurrent connectivity changes can cause misalignment that leads to mechanical failure of the system. This paper presents a new approach to reconfiguration, inspired by the art of origami, that eliminates connectivity changes during transformation. Our method consists of an energy-optimal reconfiguration planner that generates an initial 2D assembly pattern and an actuation sequence of the modular units, both resulting in minimum energy consumption. The algorithmic framework includes two approaches, an automatic modeling algorithm as well as a heuristic algorithm. We further demonstrate the effectiveness of our method by applying the algorithms to Mori, a modular origami robot, in simulation. Our results show that the heuristic algorithm yields reconfiguration schemes with high quality, compared with the automatic modeling algorithm, simultaneously saving a considerable amount of computational time and effort.

Time-variant burst strength of pipe with corrosion defects considering mechano-electrochemical interaction

2021 ◽  
Vol 169 ◽  
pp. 108479
Author(s):  
Huakun Wang ◽  
Yang Yu ◽  
Weipeng Xu ◽  
Zhenmian Li ◽  
Sizhe Yu
Keyword(s):  
Burst Strength ◽  
Corrosion Defects
Sign in / Sign up

Export Citation Format

Share Document