Very High Cycle Fatigue - Testing Methods

Horst, Peter; Adam, T.; Lewandrowski, M.; Begemann, Benjamin; Nolte, Felix

doi:10.1088/1757-899x/388/1/012004

Cited by 4 publications

(6 citation statements)

References 25 publications

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“…144,145 For example, previous research has demonstrated that layups characterized by elevated shear stresses, such as angle plies, would generate an inordinate amount of heat. 38,50,146 The Japan Welding Engineering Society standardized the USF testing method in 2017. 147 This standard's applicability is limited to metallic materials that have undergone assessment in ambient conditions.…”

Section: Fatigue Behavior (S -N Data)mentioning

confidence: 99%

“…3,23,25,37,142,174 The phenomena observed in UD laminates include matrix cracking and delamination, 3,9 while cross-ply laminates experience delamination and transverse cracking in 90 layers. 33,38,39,45,50,146,175 Angle-ply laminates experience delamination and matrix cracking, 176,177 quasi-isotropic laminates undergo delamination and matrix cracking, 31,32,140 and woven laminates undergo fiber-matrix de-bonding, matrix cracking, delamination, and transverse cracking. 11,135,178,179 Although all the mechanisms mentioned could potentially occur in various types of FRPs, only a subset of them is discussed in the papers about the VHCF regime test in UD USF.…”

Section: Fiber Angle Effectmentioning

confidence: 99%

“…Layup configuration is among the primary determinants 144,145 . For example, previous research has demonstrated that layups characterized by elevated shear stresses, such as angle plies, would generate an inordinate amount of heat 38,50,146 …”

Section: Fatigue Behavior (S–n Data)mentioning

confidence: 99%

“…47 Furthermore, fatigue behavior is influenced by the load ratio (tension-tension, tension-compression, and compression-compression), where compressive loading has been demonstrated to have a greater negative impact on HCF compared to tensile loading. 48,49 In the following, an extensive range of fatigue damage mechanisms, encompassing different material systems, fabrication configurations, and loading conditions, are discussed: i. De-bonding of fiber matrices and cracking of matrices 38,39,50 : Fiber-matrix de-bonding and matrix fracture are frequent initial damage mechanisms observed in the VHCF regime. Typically, matrix fracture commences within the 90 strata and advances along the breadth and thickness of the specimen.…”

Section: Introductionmentioning

confidence: 99%

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Very high cycle fatigue of fiber‐reinforced polymer composites: Uniaxial ultrasonic fatigue

Behvar,

Sojoodi,

Elahinia

et al. 2024

Fatigue Fract Eng Mat Struct

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This review explores uniaxial ultrasonic fatigue (USF) testing as a common and dependable method for quantifying the extended fatigue life of fiber‐reinforced polymer (FRP) composites. The objective is to explain the complexities governing the fatigue life behavior of FRPs, particularly in the realm of very high cycle fatigue (VHCF) where the number of loading cycles exceeds 107. To this end, this review encompasses the analysis of VHCF behavior, including the derivation and interpretation of stress–life (S–N) data, the evaluation of various fatigue damage mechanisms (i.e., controlling mechanisms of crack initiation and propagation) exhibited in FRP composites, and a thorough investigation of the frequency‐dependent effects on fatigue responses. Furthermore, this review tries to analyze the microscopic intricacies intrinsic to the VHCF failure of FRP composites, encompassing aspects such as fiber‐matrix de‐bonding, matrix cracking, and delamination, unveiling their modes and effects in a detailed manner. This review also underscores the pivotal integration of simulations, machine learning, and modeling techniques, emphasizing their crucial role in explaining both macroscopic and microscopic interactions governing the VHCF of FRPs.

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Section: Fatigue Behavior (S -N Data)mentioning

confidence: 99%

Section: Fiber Angle Effectmentioning

confidence: 99%

Section: Fatigue Behavior (S–n Data)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Very high cycle fatigue of fiber‐reinforced polymer composites: Uniaxial ultrasonic fatigue

Behvar,

Sojoodi,

Elahinia

et al. 2024

Fatigue Fract Eng Mat Struct

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show abstract

“…High cycle fatigue tests on composite materials are mostly performed using servo hydraulic testing devices at frequencies within 3-10 Hz. However, even at a frequency of 10 Hz, it can take up to 116 days to complete 10 8 cycles without interrupting the experiment, which is too expensive and too time consuming [18]. In this work, we independently developed an ultrasonic three point bending test device to carry out the very high cycle fatigue test of the CFRP specimens, as shown in Figure 4.…”

Section: Test Apparatusmentioning

confidence: 99%

Very High Cycle Fatigue (VHCF) Characteristics of Carbon Fiber Reinforced Plastics (CFRP) under Ultrasonic Loading

Cui

Chen

et al. 2020

Materials

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A liquid nitrogen cooling system was developed to ensure the successful ultrasonic testing of composite materials to characterize the very High Cycle Fatigue (VHCF) of carbon fiber reinforced plastics (CFRP). The fatigue failure of CFRP occurs even in the very high cycle range and there is no traditional fatigue limit. The S–N curve of the CFRP presents a step whose characteristics appear in the transition between high cycle and very high cycle fatigue. The damage evolution of CFRP in the same field of view is investigated. The morphology of damaged CFRP composites under ultrasonic loading is described by three characteristics: matrix damage at the intersection of fiber bundles, near fiber bundle parallel section matrix cavity and matrix penetration. With the increasing of cycles, the damage process is also presented in turn according to these three characteristics. The post-fatigue bending modulus changed significantly from the pre-fatigue values, indicating that the VHCF had a considerable impact on the mechanical properties of the composite. An evolution threshold was introduced from the S–N curve to determine the fatigue evolution law from the high cycle regime to the very high cycle regime.

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Mechanical testing of metallic biomaterials

Biesiekierski

Munir

et al. 2020

Metallic Biomaterials Processing and Medical Device Manufacturing

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Very High Cycle Fatigue - Testing Methods

Cited by 4 publications

References 25 publications

Very high cycle fatigue of fiber‐reinforced polymer composites: Uniaxial ultrasonic fatigue

Very high cycle fatigue of fiber‐reinforced polymer composites: Uniaxial ultrasonic fatigue

Very High Cycle Fatigue (VHCF) Characteristics of Carbon Fiber Reinforced Plastics (CFRP) under Ultrasonic Loading

Mechanical testing of metallic biomaterials

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