Ultrasonic estimation of the residual stresses

Kurashkin, K. V.; Mishakin, V. V.

doi:10.1134/s0020168514150060

Cited by 13 publications

(3 citation statements)

References 2 publications

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“…One NDT method consists of conducting vibration tests [2], and performing modal analysis to relate the damage to variations of natural frequencies and modal damping factors. Other methods rely on pulse-echo ultrasonic Tests (UT) by studying the effects of stresses in the relationship between Poisson ratios [3] or the ultrasonic attenuation coefficient [4]. The present paper investigates an alternative referred to in the literature as the metal magnetic memory (MMM) technique.…”

Section: Introductionmentioning

confidence: 99%

Metallic Slit-Plate Dampers: Damage Evaluation with Metal Magnetic Memory Technique and Application to Structures with Rocking Columns

Abarkane

Ríos-García

Galé-Lamuela

et al. 2019

Metals

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Inelastic deformation of metallic materials is one of the most effective mechanisms for the dissipation of energy input to a structure by an earthquake. Metallic dampers are special devices that resort to this source of energy dissipation, proving to be a cost-efficient solution for the seismic protection of structures. Two important issues arise when implementing metallic dampers in real structures: (1) Inelastic deformations cause damage that must be quantified after an earthquake to decide upon their eventual replacement; (2) dampers must possess an energy dissipation capacity large enough to endure severe earthquakes. This paper focuses on a particular type of metallic damper consisting of slit-plates made of stainless steel, applied to reinforced concrete frames with rocking columns at the first story. In particular, a new damage index based on the metallic magnetic memory (MMM) method is proposed and validated experimentally to quantify the damage of slit plate dampers subjected to cyclic loadings. Further, the seismic response of a frame with rocking columns that incorporate the damper is obtained to demonstrate that it can endure severe earthquakes without failing, and to emphasize the relevance of the proposed MMM damage index that would make its replacement after a severe earthquake unnecessary.

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Section: Introductionmentioning

confidence: 99%

Metallic Slit-Plate Dampers: Damage Evaluation with Metal Magnetic Memory Technique and Application to Structures with Rocking Columns

Abarkane

Ríos-García

Galé-Lamuela

et al. 2019

Metals

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“…There are several nondestructive techniques that are usually applied in engineering practice to evaluate structure stress, such as neutron-diffraction (ND) [4][5] , X-ray diffraction (XRD) [6][7] and ultrasonic testing (UT) [8][9] , etc. Comparing with other methods, the ultrasonic method is acknowledged to be one of the most potential non-destructive inspection methods in structural stress measurement filed for its fine sensitivity, veracity and good operation features.…”

Section: Introductionmentioning

confidence: 99%

Application of acoustoelasticity in studying compressive stress state in Polymer bonded explosive

Zhang

Zhou

et al. 2015

2015 IEEE Far East NDT New Technology &Amp; Application Forum (FENDT)

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The acoustoelastic technique is a nondestructive technique for analyzing the stress state in materials using ultrasonic waves. The velocities of the ultrasonic waves propagating through Polymer bonded explosive (PBX) change depending on the applied stress (compression or tension). In this paper, PBX specimens at close range of densities and ultrasonic wave velocities under similar initial conditions are applied in the compressive loading tests. Ultrasonic longitudinal wave propagation direction is parallel and perpendicular to applied stress direction respectively. Longitudinal wave velocities are accurately and efficiently achieved by real-time Ultrasonic time differences (velocity) measurement unit. In the range of stress evaluated under compression between 0 and 15MPa, these relations between the relative variation of the longitudinal wave velocity and the applied stress vary linearly. The value of acoustoelastic constant (K) can be determined by the compression tests. These founds suggest the potential of applying the acoustoelastic effect to determine the compressive stress condition of PBX in a certain stress range.

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“…In this context, the present paper investigates the application of pulse-echo Ultrasonic Tests (UT) as an alternative to the vibration method, to quantitatively assess the level of damage in a "slit plate" damper. Some previous investigations regarding the damage of steel components have involved the Ultrasonic Testing [9,10]. However, no other work has applied the ultrasonic testing for the inspection of seismic dampers with a validation by means of a reliable mechanical index.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Pulse-Echo Signal Analysis for Damage Evaluation of Metallic Slit-Plate Hysteretic Dampers

Abarkane

Galé-Lamuela

Benavent‐Climent

et al. 2017

Metals

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This paper proposes a pulse-echo Ultrasonic Testing (UT) methodology to quantify the damage of hysteretic dampers subjected to cyclic loadings. Energy dissipation is known as an innovative strategy for the protection of buildings against earthquakes. It consists of installing special devices called dampers in the construction, which are entrusted to dissipate most of the energy input by the earthquake, thus keeping the main structure basically undamaged. In particular, the hysteretic dampers dissipate the input energy through plastic deformations in their metallic parts. Several moderate ground motions would not exhaust the capacity of the dampers, but they cause damage-plastic deformations in the device. Therefore, continuous or periodic inspections of the damper are required in order to decide upon its eventual replacement. In this particular work, several hysteretic dampers made of stainless steel were subjected to different patterns of low-frequency cyclic loads that caused diverse levels of damage. Each damper underwent pulse-echo UT before and after the cyclic loading. Spectral energy of the echo signals was properly calculated at each damage level in order to define a reliable damage index. The new index has been compared with a well-established mechanical damage index, ID, previously proposed by the authors. A successful correlation was observed, making the pulse-echo UT technique promising for this particular application.

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Ultrasonic estimation of the residual stresses

Cited by 13 publications

References 2 publications

Metallic Slit-Plate Dampers: Damage Evaluation with Metal Magnetic Memory Technique and Application to Structures with Rocking Columns

Metallic Slit-Plate Dampers: Damage Evaluation with Metal Magnetic Memory Technique and Application to Structures with Rocking Columns

Application of acoustoelasticity in studying compressive stress state in Polymer bonded explosive

Ultrasonic Pulse-Echo Signal Analysis for Damage Evaluation of Metallic Slit-Plate Hysteretic Dampers

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