Validation of the low-velocity impact damage prediction through analytical scaling

Bogenfeld, Raffael Marius; Kreikemeier, Janko; Wille, Tobias

doi:10.1016/j.compstruct.2018.11.011

Cited by 6 publications

(3 citation statements)

References 31 publications

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“…Table 1. Material data used for the FE analysis as provided in [30]. Figure 4b depicts the position and the size of the strain gauges, including the measuring grids on the FE mesh as a representation of scale.…”

Section: Finite Element Model Of the Test Set-upmentioning

confidence: 99%

Experimental Comparative Analysis of the Through-Thickness and In-Plane Compression Moduli of Unidirectional CFRP Laminates

Bogenfeld

2024

J. Compos. Sci.

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This study explores the experimental characterization of the through-thickness compression properties in unidirectional laminates using cube compression tests. Cubical specimens, each with an edge length of 10, were symmetrically outfitted with biaxial strain gauges and subjected to a compression test. While similar methodologies exist in the literature, this work primarily addresses the potential biases inherent in the testing procedure and their mitigation. The influence of friction-induced non-uniform deformation behavior is compensated through a scaling of the stiffness measurements using finite element (FE) analysis results. This scaling significantly enhances the accuracy of the resulting parameters of the experiments. The ultimate failure of the specimens, originating from stress concentrations at the edges, resulted in fracture angles ranging between 60∘ and 67∘. Such fracture patterns, consistent with findings from other researchers, are attributed to shear stress induced by friction at the load introduction faces. The key findings of this research are the comparisons between the through-thickness modulus (E33c) and strength (X33c) and their in-plane counterparts (E22c and X22c). The results indicate deteriorations of E33c and X33c from E22c and X22c by margins of 5 and 7, respectively. Furthermore, the results for E22c and X22c were compared with the results obtained through a standard test, revealing a 12 enhancement in strength X22c and 4 underestimated stiffness E22c in the cube compression test.

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Section: Finite Element Model Of the Test Set-upmentioning

confidence: 99%

Experimental Comparative Analysis of the Through-Thickness and In-Plane Compression Moduli of Unidirectional CFRP Laminates

Bogenfeld

2024

J. Compos. Sci.

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“…The general purpose of computational models and simulation of impact damage in composites is to develop methodologies of impact responses, correlate the computational results with the experimental results, and finally to analyse typical impacts to fully comprehend the characteristics of impact damages. 114 There have been numerous research efforts by many researchers, which discuss the impact damage of composites by analytical, 110,[115][116][117][118] numerical simulation approaches, and impact location monitoring (e.g. using thin film sensor) with aiding simulation and theoretical calculations.…”

Section: Impact Damage Modelling In Composite Laminatesmentioning

confidence: 99%

Improving the impact resistance and damage tolerance of fibre reinforced composites: A review

Dalfi,

Jan,

Yousaf

et al. 2023

Journal of Composite Materials

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As the use of composite laminates are unceasingly increasing more and more in many applications, the in-depth understanding about the impact response of composite laminates in certain areas like sport, aerospace and automotive has gained more attention of the designers and scientists over the last two decades. The authors have focused to review the impact properties of fibre reinforced composites particularly impact damage tolerance. Impact resistance, damage tolerance, composite failure and methods of assessing damage tolerance are presented. Furthermore, the approaches for improving damage tolerance such as fibre architectures resin system, and hybridisation using either yarn hybridisation or hybrid layers are discussed. In the end, a survey of modelling the impact damage of laminated composites is made by considering the inter-laminar and intra-laminar failures as key point for evaluating the response of laminates under impact loading.

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“…Later, they conducted a series of impact tests to assess the analytical scaling method. They identified higher-order vibration as playing an important role in affecting the energy balance of impacts on the structural level [24]. Abisset et al [25] found that all scaled composites laminates during the static indentation test exhibited similar damage patterns despite being loaded at different levels.…”

Section: Introductionmentioning

confidence: 99%

Scale Effect on Impact Performance of Unidirectional Glass Fiber Reinforced Epoxy Composite Laminates

Shen

Jiang

2019

Materials

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As a result of the increasing use of glass fiber reinforced plastic (GFRP) composites in engineering fields, the investigation of scale effect on impact performance for this kind of composite is essential for large scale structure design. The effects of scaling on the impact response of simply supported unidirectional GFRP were investigated through drop weight impact (DWI) tests in this study. Impact tests were undertaken over a wide range of energies to generate damages between barely visible and initiated penetration on four scale size GFRP laminates. The main impact responses including impact force, contact duration, displacement, energy absorption and damage area of scaled specimens were normalized to compare with the full-size specimen. It was found that the impact response of large sample with elastic deformation and small area of delamination can be predicted accurately according to a geometrical similar scaling law. Scale effect was found in the damage threshold force and absorbed energy of the laminates when significant internal damage occurs due to the microstructural effect becoming important in resisting impact force and absorbing impact energy. Moreover, the energy partition and effective stiffness were calculated according to the energy balance model to reveal the contribution of different modes of deformations on energy absorption for the GFRP laminates.

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Validation of the low-velocity impact damage prediction through analytical scaling

Cited by 6 publications

References 31 publications

Experimental Comparative Analysis of the Through-Thickness and In-Plane Compression Moduli of Unidirectional CFRP Laminates

Experimental Comparative Analysis of the Through-Thickness and In-Plane Compression Moduli of Unidirectional CFRP Laminates

Improving the impact resistance and damage tolerance of fibre reinforced composites: A review

Scale Effect on Impact Performance of Unidirectional Glass Fiber Reinforced Epoxy Composite Laminates

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