Quantitative investigation of local strain and defect formation in short glass fibre reinforced polymers using X-ray computed tomography

Maurer, Julia; Salaberger, Dietmar; Jerabek, Michael; Kastner, Johann; Major, Zoltán

doi:10.1080/10589759.2022.2075865

Cited by 7 publications

(4 citation statements)

References 26 publications

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“…The constant radius test specimen (CR) was in situ tested in an interrupted manner until fracture similar as presented in [3]. The load steps were defined starting at 30 % of the tensile strength, followed by 52 % and then increased by 8 % until fracture.…”

Section: Methodsmentioning

confidence: 99%

“…X-ray computed tomography (CT) is a suitable method for the investigation of such materials and the ongoing damage processes [1]. For the analysis of the defect mechanisms and the quantification of the local strain distribution, interrupted in situ tensile tests are decisive [2,3]. A rather new approach is the local strain evaluation based on Digital Volume Correlation (DVC), introduced 1999 by Bay et al [4].…”

Section: Introductionmentioning

confidence: 99%

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Local defect formation in short glass fibre reinforced polymers – micro-mechanical simulations and interrupted in-situ experiments

Maurer,

Krölling,

Salaberger

et al. 2023

APP

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Discontinuous fibre reinforced polymers are widely used in various industry sectors and often replace conventional materials, due to lower production costs and their lightweight structure. For improvement of the component design, detailed knowledge of the failure mechanisms are necessary. To better understand the defect formation and thus the micro-mechanics, the strain behaviour in single fibres was analysed by micro-mechanical simulations of Representative Volume Elements (RVE). Therefore, selected fibres – similar orientated as in the real structure – were chosen for detailed analysis. Additionally, the defect formation next to selected fibres was investigated by X-ray computed tomography (CT). Furthermore, the critical fibre length was estimated based on the protruding fibre length of the fracture surface. Overall the simulation results correspond to theory. However, the detailed local inspection of the experimental volume data showed a rather strong influence of neighbouring fibres.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Local defect formation in short glass fibre reinforced polymers – micro-mechanical simulations and interrupted in-situ experiments

Maurer,

Krölling,

Salaberger

et al. 2023

APP

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show abstract

“…In its final form, our visual analytics framework consists of an overview visualization, three different detailed views and a matrix of spatial representations. Figure 1 demonstrates the user interface of our framework showing an in situ test of a short glass fiber reinforced polymer which exposed to seven different load steps [10].…”

Section: Methodsmentioning

confidence: 99%

Visualization Techniques for the Comparative Analysis of Multivariate Data of Fiber Reinforced Polymers

Heim¹,

Maurer²,

Kastner³

et al. 2022

eJNDT

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The comparative analysis of data from multiple candidate material systems is essential for the improvement and development of advanced composite materials. Since the characteristics (e.g., length, orientation) of individual objects (e.g., pores, fibers) are crucial for the properties and the behavior of materials, the exploration of these is of utmost importance. Currently, the comparison of these multivariate, numerical data requires significant mental efforts, since the experts have to perform a sequential comparison of many slightly different charts. This work aims to simplify the workflow for comparing many datasets by providing experts with an interactive visualization framework. By combining different representations at various levels of detail, it assists users to get a holistic view on the similarities of the objects and their characteristics. An overview visualization allows to determine the similarity of the objects of several samples, additional detail visualizations give the user detailed information about groups of similar structures. We demonstrate the applicability of our tool on two use cases, a fiber material subjected to an in situ test, and a comparative study of multiple pore datasets.

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“…As consequence, its damage mechanism can be different for high or low temperature applications -e.g., earlier development of defects such as pores and cracks (and therefore higher stress) in case of low temperatures or only plastic deformations (and therefore much lower stress) of the polymer due to high application temperatures. In the last few years in-situ investigations have become of great importance [1][2][3][4]. Various research groups developed novel methods and test rigs for such investigations.…”

Section: Introductionmentioning

confidence: 99%

MIST – Mechanical In-situ Stage with Temperature control for X-ray computed tomography

Maurer¹,

Heupl²,

Kendel³

et al. 2023

eJNDT

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X-ray Computed Tomography (CT) in combination with a tensile/compression stage can deliver great insights in the damage mechanisms of a material. As the material properties change at low and high temperatures, materials may perform differently as they do at room temperature. In this paper, a novel Mechanical In-situ Stage with Temperature control (MIST) for the usage in laboratory CT devices for high resolution - (3 μm)³ - acquisitions is presented. Since the specimen temperature is controlled by air flow, the MIST stage is suitable for testing polymers and allows cooling and heating in one test cycle (-10 °C to +100 °C). The MIST stage is a modification of the CT500 DEBEN tensile/compression stage. It enables mechanical tests that combine the application of force and temperature on a sample at the same time. A technical description of the developed stage is presented. Furthermore, its advantages compared to existing devices are explored and application fields of the MIST are shown.

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Quantitative investigation of local strain and defect formation in short glass fibre reinforced polymers using X-ray computed tomography

Cited by 7 publications

References 26 publications

Local defect formation in short glass fibre reinforced polymers – micro-mechanical simulations and interrupted in-situ experiments

Local defect formation in short glass fibre reinforced polymers – micro-mechanical simulations and interrupted in-situ experiments

Visualization Techniques for the Comparative Analysis of Multivariate Data of Fiber Reinforced Polymers

MIST – Mechanical In-situ Stage with Temperature control for X-ray computed tomography

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