High-speed bending-fatigue testing of composite materials

Ueki, Yosuke

doi:10.1088/1757-899x/388/1/012008

Cited by 11 publications

(5 citation statements)

References 6 publications

(10 reference statements)

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“…Under cyclic bending loads, only Michel et al 3 performed fatigue experiments up to 10 9 cycles with a servo-hydraulic system with a cyclic frequency up to 158 Hz. Yoshi et al, 12 Gude et al, 13 Koch et al, 14 and Ueki et al 15 used shakerbased test systems to apply cyclic bending loads on CFRP and GFRP materials at loading frequencies between 60 and 230 Hz. Backe et al, 16,17 Weibel et al, 18 Cui et al, 19 Li et al, 20 Premanand and Balle, 21 and Premanand et al 22 investigated the VHCF and GCF of CFRP at ultrasonic cyclic frequencies.…”

Section: Accelerated Fatigue Test Methodsmentioning

confidence: 99%

Influence of pulse duration on the fatigue behavior of a carbon‐fiber‐reinforced composite under cyclic three‐point bending at 20 kHz

Premanand,

Balle

2024

Fatigue Fract Eng Mat Struct

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Very high cycle fatigue (VHCF) experiments are limited in practice due to their long testing times. In ultrasonic fatigue test (UFT) systems, the cyclic oscillation is applied using resonance at 20 kHz with a pulse and pause sequence. However, determining optimal pulse durations to achieve minimal testing time and avoid thermal‐induced fatigue damage in fiber‐reinforced polymer composites remains a challenge. In this work, several fatigue experiments, temperature analyses, and digital light optical microscopy were carried out to evaluate the influence of pulse duration on the fatigue behavior of a carbon‐fiber fabric reinforced in polyether‐ketone‐ketone (CF‐PEKK) composite. A shorter pulse duration with the same pulse–pause ratio as the longer pulse duration is proposed for higher stress amplitudes to avoid any thermal influence during mechanical fatigue without altering the underlying fatigue damage mechanisms.

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Section: Accelerated Fatigue Test Methodsmentioning

confidence: 99%

Influence of pulse duration on the fatigue behavior of a carbon‐fiber‐reinforced composite under cyclic three‐point bending at 20 kHz

Premanand,

Balle

2024

Fatigue Fract Eng Mat Struct

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“…In the case of optimal materials design and selection, there may be a number of causative factors contributing to improving the K values of PMC structures to avoid the intensive structural degradation of such PMCs, one of which may be the specimen thickness. For this purpose, Ueki [178] provided analytical relations for the determination of the temperature growth during a fatigue test and the temperature distribution through the laminated specimen thicknesses with values of 3 mm and 6 mm. As a result of increasing the specimen thickness, the temperature rose significantly by almost 100%, ranging from 20 • C to 40 • C in bending mode, and varying from just below 60 • C to 120 • C in uniaxial tension/compression mode with loading conditions of f = 200 Hz, σ = 100 MPa and R = −1 (see Figure 62).…”

Section: Role Of Pmc Specimen Thicknessmentioning

confidence: 99%

Recent Advances in Limiting Fatigue Damage Accumulation Induced by Self-Heating in Polymer–Matrix Composites

Amraei

Katunin

2022

Polymers

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The self-heating effect can be considered as a catastrophic phenomenon that occurs in polymers and polymer–matrix composites (PMCs) subjected to fatigue loading or vibrations. This phenomenon appears in the form of temperature growth in such structures due to their relatively low thermal conductivities. The appearance of thermal stress resulting from temperature growth and the coefficient of thermal expansion (CTE) mismatch between fibers and neighboring polymer matrix initiates and/or accelerates structural degradation and consequently provokes sudden fatigue failure in the structures. Therefore, it is of primary significance for a number of practical applications to first characterize the degradation mechanism at the nano-, micro- and macroscales caused by the self-heating phenomenon and then minimize it through the implementation of numerous approaches. One viable solution is to cool the surfaces of considered structures using various cooling scenarios, such as environmental and operational factors, linked with convection, contributing to enhancing heat removal through convection. Furthermore, if materials are appropriately selected regarding their thermomechanical properties involving thermal conductivity, structural degradation may be prevented or at least minimized. This article presents a benchmarking survey of the conducted research studies associated with the fatigue performance of cyclically loaded PMC structures and an analysis of possible solutions to avoid structural degradation caused by the self-heating effect.

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“…Based on the fibers’ material properties, their interrelationships for the formation of composite laminate and the mutual combination of different types of materials during the creation of the final product are described in this article. This research is aimed at obtaining input values of material characteristics, e.g., tensile, bending, and related properties, for FEM calculations [ 9 , 10 , 11 , 12 ]. The FEM-based models were developed and verified with experimental data.…”

Section: Introductionmentioning

confidence: 99%

Computational Analysis of Mechanical Properties in Polymeric Sandwich Composite Materials

Kohar,

Miskolci,

Pompas

et al. 2024

Polymers

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This article focuses on the computational analysis of sandwich composite materials based on polypropylene, polyester, glass, and cotton fibers. In the automotive components prepared from these fiber materials, the various components are used in different proportions. Through the manufacturing process, isotropic materials become somewhat anisotropic. Part of this article is aimed at obtaining input values of material characteristics for calculations using finite element analysis (FEM) and the comparison of experimental results with FEM-based material models created using the Digimat 2023.1 software. This article analyzes the modeling of two-phase as well as multiphase composite materials. This work focuses on calculations using FEM according to the test defined in the PR375 standard for loading the finished product in the luggage compartment of a car. The defined methodology enables the application of the FEM-based calculation directly to the product design in the initial phase of research. The construction and production of expensive prototypes and the subsequent production of automotive parts is replaced by computer-based simulation. This procedure makes it possible to simulate several optimization cycles over a relatively shorter time. From the results of computational simulations, it is clear that materials based on PP/PET/glass fibers show a much higher modulus of elasticity than materials created using cotton, i.e., materials of the PP/PET/cotton type. In order to achieve a high strength and stiffness, it is, therefore, appropriate to use glass fibers in the composite materials used for such applications.

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High-speed bending-fatigue testing of composite materials

Cited by 11 publications

References 6 publications

Influence of pulse duration on the fatigue behavior of a carbon‐fiber‐reinforced composite under cyclic three‐point bending at 20 kHz

Influence of pulse duration on the fatigue behavior of a carbon‐fiber‐reinforced composite under cyclic three‐point bending at 20 kHz

Recent Advances in Limiting Fatigue Damage Accumulation Induced by Self-Heating in Polymer–Matrix Composites

Computational Analysis of Mechanical Properties in Polymeric Sandwich Composite Materials

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