Locations of strain gauges for fatigue analysis of welded joints (2)

Takeuchi, Katsuzi

doi:10.1080/09507116.2011.590680

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…For each test, a strain gage was positioned at a 0.4 t distance from weld toe to assess the HS stress. To evaluate the HS stress more precisely, two strain gages positioned at 1.0 t and 0.4 t would be required to apply the linear extrapolation . Still, one strain gage gives a reasonable estimation of the HS stress as shown in the next section, Table .…”

Section: Fatigue Testsmentioning

confidence: 99%

Effect of loading type on the fatigue strength of asymmetric and symmetric transverse non‐load carrying attachments

Ahola

Nykänen

Björk

2016

Fatigue Fract Eng Mat Struct

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This study considers the effect of bending loading and the symmetry of joints on the fatigue strength of transverse non‐load carrying attachments. Conventionally, the fatigue strength of a welded joint has been determined without taking these factors into account. Experimental and finite element analyses were carried out and both methods showed that both loading type and symmetry have an influence on the fatigue resistance of a welded joint. Under tensile loading, the fatigue strength of asymmetric T‐joints was higher than that of symmetric X‐joints. Respectively, the fatigue resistance of tested joints improved explicitly when the external loading was bending. The finite element analysis was in good agreement with the test results in the joints subjected to tension but gave very conservative results in the joints subjected to bending.

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Section: Fatigue Testsmentioning

confidence: 99%

Effect of loading type on the fatigue strength of asymmetric and symmetric transverse non‐load carrying attachments

Ahola

Nykänen

Björk

2016

Fatigue Fract Eng Mat Struct

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“…This can be determined by the use of strain gauges that are positioned in close proximity to the crack plane. Takeuchi (2012) [25] also suggested methods for applying strain gauges for estimating the mechanical response of the tested material and for crack monitoring based on the current methods for predicting the fatigue life of welded joints. Variations in measured strain amplitude and a phase difference process between two strain gauges attached across the region of interest were used by Lukashevich et al (2015) [19] as an indication of crack growth near welds of low-carbon steel butt welded joints.…”

Section: Introductionmentioning

confidence: 99%

Front face strain compliance for quantification of short crack growth in fatigue testing

Hasan

Chaudhuri

Waele

2023

The Journal of Strain Analysis for Engineering Design

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Short fatigue crack growth investigation is of considerable scientific interest as it comprises a significant portion of the total fatigue life of a structure. It is very challenging to accurately quantify this stage of fatigue crack growth experimentally. In this article, a novel front face strain compliance technique for single-edge notched specimens subjected to four-point bending is proposed. Finite element analysis is performed to determine the correlation between crack length and strain change near the crack. This relationship is then validated by experiments in which strains are measured by strain gauges attached near the short crack, and crack length is quantified by examining beachmark lines at the fracture surfaces. Based on the numerical and experimental results, it is concluded that the strain measured near the notch allows quantifying short crack growth for normalised crack lengths in the range 0.01 ≤ a/W ≤ 0.06 ( a/W being the ratio of crack length over specimen width). A compliance equation based on the front face strain is finally presented.

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“…A slight change in the temperature can generate a measurement error of several microstrain. For the extension of strain gauge cables, a careful consideration is needed when extending to long lengths because the overall resistance of the strain gauge assembly will change (Takeuchi 2012).…”

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confidence: 99%

Strain Monitoring

Vanlanduit

Sorgente²,

Zadeh³

et al. 2021

Structural Health Monitoring Damage Detection Systems for Aerospace

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This chapter provides an overview of the use of strain sensors for structural health monitoring. Compared to acceleration-based sensors, strain sensors can measure the deformation of a structure at very low frequencies (up to DC) and enable the measurement of ultrasonic responses. Many existing SHM methods make use of strain measurement data. Furthermore, strain sensors can be easily integrated in (aircraft) structures. This chapter discusses the working principle of traditional strain gauges (Sect. 8.1) and different types of optical fiber sensors (Sect. 8.2). The installation requirements of strain sensors and the required hardware for reading out sensors are provided. We will also give an overview of the advantages and the limitations of commonly used strain sensors. Finally, we will present an overview of the applications of strain sensors for structural health monitoring in the aeronautics field.

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Locations of strain gauges for fatigue analysis of welded joints (2)

Cited by 6 publications

References 3 publications

Effect of loading type on the fatigue strength of asymmetric and symmetric transverse non‐load carrying attachments

Effect of loading type on the fatigue strength of asymmetric and symmetric transverse non‐load carrying attachments

Front face strain compliance for quantification of short crack growth in fatigue testing

Strain Monitoring

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