Results 11 to 20 of about 7,277,805 (309)

Crack Size Identification for Bearings Using an Adaptive Digital Twin. [PDF]

open access: yesSensors (Basel), 2021
In this research, the aim is to investigate an adaptive digital twin algorithm for fault diagnosis and crack size identification in bearings. The main contribution of this research is to design an adaptive digital twin (ADT).
Piltan F, Kim JM.
europepmc   +2 more sources

A Fatigue Crack Size Evaluation Method Based on Lamb Wave Simulation and Limited Experimental Data. [PDF]

open access: yesSensors (Basel), 2017
This paper presents a systematic and general method for Lamb wave-based crack size quantification using finite element simulations and Bayesian updating.
He J, Ran Y, Liu B, Yang J, Guan X.
europepmc   +2 more sources

Study on the Relationship between Crack Initiation and Crack Bifurcation in Walnut Shells Based on Energy

open access: yesAgriculture, 2023
Clarifying the dissipated energy required for crack expansion is an effective way to control material crushing. Therefore, based on the material fracture probability model and fractal theory, the energy range required for crack extension was determined ...
Xiaolan Man   +6 more
doaj   +1 more source

Some experimental observations of crack-tip mechanics with displacement data [PDF]

open access: yesFracture and Structural Integrity, 2015
In the past two decades, crack-tip mechanics has been increasingly studied with full-field techniques. Within these techniques, Digital Image Correlation (DIC) has been most widely used due to its many advantages, to extract important crack-tip ...
M. Mokhtari   +3 more
doaj   +2 more sources

Blending hydrogen in existing natural gas pipelines: Integrity consequences from a fitness for service perspective

open access: yesJournal of Pipeline Science and Engineering, 2023
Blending hydrogen in existing natural gas pipelines compromises steel integrity because it increases fatigue crack growth, promotes subcritical cracking and decreases fracture toughness.
Mariano A. Kappes, Teresa E. Perez
doaj   +1 more source

Dislocation Mechanics Pile-Up and Thermal Activation Roles in Metal Plasticity and Fracturing

open access: yesMetals, 2019
Dislocation pile-up and thermal activation influences on the deformation and fracturing behaviors of polycrystalline metals are briefly reviewed, as examples of dislocation mechanics applications to understanding mechanical properties.
Ronald W. Armstrong
doaj   +1 more source

On a kinked crack model to describe the influence of material microstructure on fatigue crack growth [PDF]

open access: yesFracture and Structural Integrity, 2013
Threshold condition and rate of fatigue crack growth in both short and long crack regime appear to be significantly affected by the degree of crack deflection.
Andrea Spagnoli   +2 more
doaj   +3 more sources

A fatigue crack quantification model for metallic structure based on strain monitoring data

open access: yesXibei Gongye Daxue Xuebao, 2023
Obtaining the real-time fatigue crack length of a metallic structure is the prerequisite of the fatigue life monitoring and residual life estimation for an aircraft.
LI Kunpeng   +5 more
doaj   +1 more source

Fatigue Life Assessment and Reliability Analysis of Cope-Hole Details in Steel Bridges

open access: yesThe Baltic Journal of Road and Bridge Engineering, 2020
Cope-hole details are widely applied to steel bridges. However, the safety of steel bridges is influenced by the fatigue performance of welded details.
Ping Liao   +5 more
doaj   +1 more source

VIBROTHERMOGRAPHIC CRACK HEATING: A FUNCTION OF VIBRATION AND CRACK SIZE

open access: yesAIP Conference Proceedings, 2009
Vibrothermography is an inspection technique that detects cracks by observing vibration induced crack heating. Frictional crack heating in a vibrating specimen is directly linked to the resonant vibrational stress on the crack. In simple geometries we can measure the vibrational mode structure and intuit the dynamic vibrational stress field on the ...
Stephen D. Holland   +4 more
openaire   +2 more sources

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