NDT Methods Suitable for Evaluation the Condition of Military Fortification Construction in the Field

Zezulová, Eva; Kamila, Hasilová; Komárková, Tereza; Stonis, Patrik; Štoller, Jiří; Anton, O

doi:10.3390/app10228161

Cited by 16 publications

(13 citation statements)

References 18 publications

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“…Fibre-reinforced concrete “SFRC” is a composite material with better qualitative strength characteristics than plain concrete. Thus, the distribution of fibres significantly affects the resulting mechanical properties and performance of the composite [ 8 , 9 , 10 , 11 , 12 ]. All the properties of fibre reinforced concrete are, in real use, able to meet the computing and model requirements, especially when meeting the condition of uniform fibre dispersion.…”

Section: Introductionmentioning

confidence: 99%

The Development of Controlled Orientation of Fibres in SFRC

et al. 2021

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The article is focused on finding the possibility of the controlled orientation of fibres in fibre reinforced concrete constructions. This is because the controlled orientation of the fibres can contribute to the improvement of some properties of fibre reinforced concrete. The research is based on the experimental investigation of orientation control–rotation of fibres in a transparent matrix representing concrete replacement. From the conceptual model, the article continues with experimentation, data analysis and comparison of conclusions. During the experiment, a mechanical tool was developed and monitored to guide the fibres. The main monitored parameters of the levelling tool were the tips dimensions and the distance between them. The experiment results show the possibility of achieving a higher orientation of the fibres around one axis and suitable parameters of a mechanical tool.

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Section: Introductionmentioning

confidence: 99%

The Development of Controlled Orientation of Fibres in SFRC

et al. 2021

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“…CT was applied in the damage detection of AHS panels with GFRP skins [5] and aluminium skins [10,28]. Other studies [29,30] characterised composite materials subjected to impact tests, not only investigating the damaged area, but also the internal damage, including the internal structure and fibre breakage on the various layers of the composite structure. Hou et al [31] analysed the challenge in the development of innovative computer-aided techniques for automatic detection from radiography images due to the limitation of human interpretation for this test method.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Evaluation of Aluminium Foam Panels Subjected to Impact Loading

et al. 2021

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Aluminium foam sandwich structures have excellent energy absorption capacity, combined with good mechanical properties and low density. Some of the authors of this paper proposed an innovative Metallic Foam Shell protective device against flying ballast impact damage in railway axles. A closed-cell aluminium foam was chosen for the Metallic Foam Shell device. The main goal of this study was the experimental investigation of the impact responses of aluminium foam panels. Low velocity impact tests were carried out at different energies on different types of aluminium foam panels in order to investigate the effects of some parameters, such as core thickness, skin material and layer. Tests were conducted at repeated impacts on aluminium foam panels without and with skins made of aluminium and glass fibre-reinforced polymer. The experimental results were compared and the impacted panels were investigated by means of the nondestructive techniques ultrasonic phased array and digital radiography.

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“…Because of these reasons, a method of evaluating the condition of these structures using a combination of non-destructive methods that could be used in situ was sought [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…This article follows up on the study [5] which documents the preparatory phase of experimental measurement. It describes the material batch A2, which consists of rectangular thin slabs with dimensions of 700 × 700 × 60 mm and made of SFRC (steel fiber reinforced concrete).…”

Section: Introductionmentioning

confidence: 99%

Experimental Campaign to Verify the Suitability of Ultrasound Testing Method for Steel Fiber Reinforced Concrete Fortification Structures

et al. 2021

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Fortification structures, both military and civilian, are designed to resist a blast explosion to some extent. Their technical condition after a blast load must be assessed in a fast and reliable way to enable the users’ decision about the future use of the structure. Preferably, for the assessment of the protective structure, the non-destructive testing method should be used. To assess the suitability of ultrasound testing method for fortification structures built from steel fiber reinforced concrete, an investigation in a laboratory and in situ was conducted, together with numerical simulation and statistical evaluation. The numerical simulation of the blast load of a steel fiber reinforced concrete slab was conducted using multiphysics simulation software with the aim to verify basic parameters of the field experiment. During the field tests, several slabs were loaded by plastic explosive and changes in the structure of the slabs, before and after the blast load, were examined using the ultrasound pass-through method. After the field tests, the slabs were subjected to a destructive laboratory test to determine their residual strength. Subsequently, the data sets obtained from the measurements were tested using functional data analysis. The results from the ultrasound pulse method show that specimens after a dynamic blast load can in some cases increase the strength of their cement matrix.

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NDT Methods Suitable for Evaluation the Condition of Military Fortification Construction in the Field

Cited by 16 publications

References 18 publications

The Development of Controlled Orientation of Fibres in SFRC

The Development of Controlled Orientation of Fibres in SFRC

Nondestructive Evaluation of Aluminium Foam Panels Subjected to Impact Loading

Experimental Campaign to Verify the Suitability of Ultrasound Testing Method for Steel Fiber Reinforced Concrete Fortification Structures

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