Results 21 to 30 of about 3,928,621 (275)

Mechanical characterization of defects in slickline units (LSUs) operating in oil wells [PDF]

Científica
Oil well activities are affected with catastrophic failures triggered by the deterioration of slickline in different mechanical, inspection and tracing operations. That is why in this work different types of steel line damage (with depths of 0.5, 1 and 1.
Mauricio Arellano Pastrana, Jesús Bermúdez Vilchiz, Apolinar Albiter Hernández, Víctor Augusto Castellanos Escamilla, Iván Enrique Martínez Merlín   +4 more
doaj   +1 more source

Characterization of mechanical damage in granite [PDF]

Fracture and Structural Integrity, 2014
This paper aims to illustrate the use of infrared thermography as a non-destructive and non-contact technique to observe the phenomenological manifestation of damage in granite under unconfined compression. It allows records and observations in real time
Minh-Phong Luong, Mehrdad Emami
doaj   +1 more source

Development and Production of Artificial Test Swarf to Examine Wear Behavior of Running Engine Components—Geometrically Derived Designs

Journal of Manufacturing and Materials Processing, 2022
Subtractive manufacturing processes are usually accompanied by the occurrence of tiny flakes and swarf, which later on cause severe wear and damage, especially in moving components such as rolling or sliding bearings, pistons, etc. However, up until now,
Patrick Brag, Volker Piotter, Klaus Plewa, Alexander Klein, Mirko Herzfeldt, Sascha Umbach   +5 more
doaj   +1 more source

Disaggregation and discretization methods for formation damage estimation in oil and gas fields: an overview

Dyna, 2020
Formation damage could potentially impede production and injection operations. Hence, characterization and discretization processes of formation damage should be connected to quantification and disaggregation techniques, relying on characterization ...
Oscar E Medina, Juan P Castaño-Correa, Cristina Caro-Vélez, Richard D Zabala, Jorge I Bahamón, Farid B Cortés, Camilo A. Franco   +6 more
doaj   +1 more source

Optically Pumped Magnetometer Measuring Fatigue-Induced Damage in Steel

Applied Sciences, 2022
Uniaxial fatigue testing of micro-mechanical metallic specimens can provide valuable insight into damage formation. Magnetic and piezomagnetic testing are commonly used for qualitative characterization of damage in ferromagnetic specimens.
Peter A. Koss, Ali Riza Durmaz, Andreas Blug, Gennadii Laskin, Omkar Satish Pawar, Kerstin Thiemann, Alexander Bertz, Thomas Straub, Christian Elsässer   +8 more
doaj   +1 more source

Characterization of Low-Velocity Impact Damage in Asymmetric Composite Shells [PDF]

Journal of Applied and Computational Mechanics
Based on numerical modelling, this study investigates asymmetric semicylindrical composite laminate shells' damage characteristics under low-velocity impact loads.
Luis Ferreira, Carlos Coelho, Paulo Reis
doaj   +1 more source

Ductile damage evolution law for proportional and non-proportional loading conditions [PDF]

Fracture and Structural Integrity, 2019
The characterization of ductile damage evolution, and its description, have been the object of extensive research in the continuum damage mechanic field.
Riccardo Fincato, Seiichiro Tsutsumi, Hideto Momii   +2 more
doaj   +1 more source

Study on Damage and Fracture Mechanism and Ontological Relationship of Rock Body in Deep Open Pit in Cold Area

Applied Sciences
The stability of open-pit mines under low-temperature conditions is critical for safe and efficient coal extraction. However, the mechanisms of rock damage and fracture under combined temperature and stress effects remain unclear, particularly regarding ...
Ming Li, Fuqiang Zhu, Zheng Kong, Liang Chen, Fangwei Fan, Boyuan Wu, Jishuo Deng, Shuai Guo   +7 more
doaj   +1 more source

Comparative study on damage characterization and damage evolution of rock under uniaxial compression

Yantu gongcheng xuebao, 2019
The evolution of stress-strain data, acoustic emission (AE) and ultrasonic characteristics of granite under uniaxial compression are synchronously tested by using the ultrasonic wave and AE synchronous monitoring devices.
ZHANG Guo-kai 1,2, LI Hai-bo 2, WANG Ming-yang 1,3, LI Jie 3, DENG Shu-xin 1
doaj   +1 more source

Bond–Slip Properties and Acoustic Emission Characterization Between Steel Rebar and Manufactured Sand Concrete

Buildings
Natural sand (NS) is facing the problem of resource scarcity, while manufactured sand (MS) has become a favorable alternative resource due to its wide range of sources, superior performance, as well as economic and environmental protection.
Lei Han, Hua Yang, Qifan Wu, Yubo Jiao
doaj   +1 more source