Thermoelastic effect in compacted steel wire ropes under uniaxial loading

Szade, Piotr; Szot, Mariusz; Kubiś, Bogusław

doi:10.1080/17686733.2020.1768495

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…3b) were carried out during the static tensile testing of the wire rope lacing in order to observe the stress distribution at the contact point and to compare it to the temperature distribution in the remaining part of the rope. the tests utilised a testo 890-1 thermal camera [55] the cable bolt and wire rope lacing test methodology under impact loading, as developed at the central Mining institute (GiG), is based on the drop weight impact method. A test facility with a height H = 9 m (the height of the load-bearing posts that also serve to guide the ram) makes it possible to test various structural elements, particularly steel arch, rock bolt and surface support elements under cyclic (impact) loading.…”

Section: Methodsmentioning

confidence: 99%

“…thermal imaging measurements at the contact point of the element loading the wire rope were carried out during the static tensile testing of the wire rope lacing in order to observe the stress distribution at the contact point and to compare it to the temperature distribution in the remaining part of the rope. Experience obtained from the work on steel rope thermoelasticity [55] as performed at GiG was used in the thermal imaging measurements. the tests of cable bolt and wire rope lacing resistance to dynamic loading were performed at a drop weight testing facility using a ram with a mass of 4000 kg and a crosshead with a mass of 3300 kg that exerted static loading on the cable bolt.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Testing of Cable Bolt and Wire Rope Lacing Resistance to Static and Dynamic Loads

2023

Archives of Mining Sciences

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Comparative testing of Cable bolt and Wire rope laCing resistanCeto statiC and dynamiC loads the conduction of mining activity under the conditions of rock bursts and rock mass tremors means that designers often utilise support systems comprising various configurations of steel arch, rock bolt and surface support. Particularly difficult geological and mining conditions, when wire mesh does not provide sufficient dynamic resistance, it requires an additional reinforcement with wire rope lacing in the form of steel ropes installed between the bolt ends and fixed to them by means of various rope clamps (e.g. u-bolt clamps). Bench tests were conducted to compare the strength of wire ropes under static and dynamic loading. the tests involved wire ropes with an internal diameter of Ø15.7 mm. tests under static loading demonstrated that the cable bolts transferred a maximum force F smax = 289.0 kn without failure, while the energy absorbed until failure was E 1s = 16.6 kj. A comparative test result analysis for the wire ropes used in the bolt designs revealed that the influence of dynamic loading forces has a significant effect on reducing the rope load capacity, which results in the brittle cracking of the wires in the rope. Although the average dynamic force leading to wire rope failure F dmax = 279.1 kn is comparable to the minimum static force F min = 279 kn defined in the relevant standard, the average energy E 1d absorbed by the cable bolt until failure is 48% lower than the energy E 1s determined for wire rope failure under static loading. Furthermore, cable bolt failure under dynamic loading occurred at an impact velocity of the combined ram and crosshead masses ranging within v p = 1.4-1.5 m/s.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative Testing of Cable Bolt and Wire Rope Lacing Resistance to Static and Dynamic Loads

2023

Archives of Mining Sciences

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“…Thermal imaging, due to its elementary operating principle and, especially, its independence from the rope materials' mechanical, electrical and magnetic properties, is suitable for rapidly detecting highly loaded load-bearing ropes with different cross-sections. The studies in [70] showed that the thermo-elastic effect occurs in compacted ropes during uniaxial loading. Measurements of the average surface temperature of the specimens between loading cycles showed that the processes The experiments conducted in [69] showed that, as the load on the steel cables increases, the temperature also rises through the increase in stress.…”

Section: Visual Inspection/thermal Imagingmentioning

confidence: 99%

A Comprehensive Review of Steel Wire Rope Degradation Mechanisms and Recent Damage Detection Methods

Mazurek

2023

Sustainability

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Steel wire ropes are the vital load-bearing element in many rope transport devices, such as mine hoists, personal lifts, bridges and cableways. Non-destructive fault detection is a crucial issue for safety and reliability. This paper presents a comprehensive review covering three areas: damage mechanisms for steel wire ropes, physical phenomena used for diagnostics of steel wire ropes and practical applications of magnetometers. The advantages and disadvantages of each group of sensors, such as the induction coil, Hall element, magnetoresistance and optically pumped magnetometers, are presented. The author indicates the direction of the development of signal analysis techniques. In summary, the challenges and future directions for the development of wire rope flaw detection in practical applications are presented, especially considering the future of passive magnetic methods.

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“…Thermoelasticity represents thermal energy generation according to the stress (load) change of an object 31 , 32 . In thermodynamic theory, stress (σ) is defined according to strain (ε) and temperature (T) as Eq.…”

Section: Background Theorymentioning

confidence: 99%

Application of infrared thermography for estimating residual stress in ground anchors for maintenance

Min

Jang

Yoon

2023

Sci Rep

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Characterizing the integrity of ground anchors is essential for examining their usability in the maintenance of soil structure. However, the lift-off test, which is generally used for this purpose, has limitations when applied to covering all installed ground anchors. The objective of this study is to assess the possibility of using infrared thermography to measure the residual stress in ground anchors as a noncontact technique that bypasses the disadvantages associated with existing techniques. A preliminary experiment is performed to determine the exact emissivity of the tested materials. Both passive and active methods, as representative techniques in infrared thermography, are applied. In the large-scale experiment, infrared images of four installed strands with growing stress in the range of 0–400 kPa at 100 kPa intervals are used in the passive method of measurement. For the active method, these same stress ranges are applied to a heated anchor head using a UTM machine. The results of the passive method show that the temperature increased and decreased according to load and unload steps. Values for the cooling rate index are deduced through the active method results, and reliable behavior are observed at 10 and 15 min. The number of pixels with huge temperature changes also changed with the loading step in both passive and active methods. This study demonstrates that infrared thermography is a suitable alternative method for assessing the residual stress in ground anchors as a type of noncontact technique.

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Thermoelastic effect in compacted steel wire ropes under uniaxial loading

Cited by 10 publications

References 17 publications

Comparative Testing of Cable Bolt and Wire Rope Lacing Resistance to Static and Dynamic Loads

Comparative Testing of Cable Bolt and Wire Rope Lacing Resistance to Static and Dynamic Loads

A Comprehensive Review of Steel Wire Rope Degradation Mechanisms and Recent Damage Detection Methods

Application of infrared thermography for estimating residual stress in ground anchors for maintenance

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