Monitoring fatigue crack growth using nonlinear ultrasonic phased array imaging [PDF]
, 2017 Nonlinear imaging techniques have recently emerged which have the potential to detect material degradation and challenging defects, such as closed cracks.
Cheng, Jingwei +3 more
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Ultrasonic Resonance Fatigue Testing of 6082 Aluminum Alloy
MetalsThis study explores the fatigue properties of EN AW-6082-T6 aluminum alloy in the gigacycle range (106–109 cycles), using ultrasonic resonance fatigue testing at 20 kHz in a push–pull mode with a symmetric load cycle (R = −1).
Diyan M. Dimitrov +3 more
doaj +1 more source
Fatigue life assessment of a railway wheel material under HCF and VHCF conditions
MATEC Web of Conferences, 2018 Fatigue damage and life assessment is still an issue and a challenge nowadays. Many different tests can be performed for the assessment of fatigue properties of any given material. In the present study a worn out railway wheel goes under uniaxial fatigue
Soares H., Costa P., Freitas M., Reis L.
doaj +1 more source
Residual Stress in Wheels: Comparison of Neutron Diffraction and Ultrasonic Methods, with Trends in RCF [PDF]
, 2014 The critical damage mechanism on many GB passenger train wheels is Rolling Contact Fatigue (RCF) cracking in the rim. Evidence from field observations suggests that RCF damage occurs much more quickly as the wheelsets near the end of their life.
Bevan, Adam +3 more
core
Rayleigh Wave Calibration of Acoustic Emission Sensors and Ultrasonic Transducers. [PDF]
, 2019 Acoustic emission (AE) sensors and ultrasonic transducers were characterized for the detection of Rayleigh waves (RW). Small aperture reference sensors were characterized first using the fracture of glass capillary tubes in combination with a theoretical
Ono, Kanji
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Ultrasonic Investigation of Tensile Fatigue Overloads in Fatigue Cracks
, 1989 The growth of a fatigue crack is generally modeled in terms of empirical rules such as the Paris law [1] which states that da/dN = A(ΔK)m where a is the crack length, N is the number of fatigue cycles at a particular stress intensity range ΔK and A and m are material constants. Recently, evidence has accumulated that establishes that the full excursion
Rehbein, David +3 more
openaire +3 more sources
Measuring wheel/rail contact stresses using ultrasound [PDF]
, 2004 The investigation of contact area and pressure distribution in a wheel/rail contact is essential information required in fatigue and wear calculations to determine design life, regrinding requirements, and maintenance schedules.
Bjorklund, S. +4 more
core
Controlled Pre-Corrosion Attack and Ultrasonic Fatigue Endurance of Titanium Alloy Ti-6Al-4V
Latin American Journal of Solids and StructuresUltrasonic fatigue tests were carried out on titanium alloy Ti-6Al-4V on the base material and the pre-corroded specimen to assess the pre-corrosion effect on the fatigue life of this alloy.
Ishvari F. Zuñiga Tello +3 more
doaj +1 more source
Ultrasonic attenuation as an indicator of fatigue life of graphite/epoxy fiber composite [PDF]
The narrow band ultrasonic longitudinal wave velocity and attenuation were measured as a function of the transfiber compression-compression fatigue of unidirectional graphite/epoxy composites.
Doll, B., Williams, J. H., Jr.
core +1 more source
Damage evolution in the AlMg6 alloy during high and very high cycle fatigue
Fracture and Structural Integrity, 2019 Paper presents the “in situ” method for determining of irreversible fatigue damage accumulation, based on the analysis of nonlinear manifestations of the feedback signal in a closed system of an ultrasonic fatigue system.
Mikhail Bannikov +3 more
doaj +3 more sources