Development and implementation of a simultaneous fatigue crack growth test setup for polymeric hybrid laminates

Riedl, Gabriel; Pugstaller, Robert; Wallner, Gernot M.

doi:10.1016/j.engfracmech.2022.108468

Cited by 15 publications

(9 citation statements)

References 23 publications

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“…For FCG in metals, the Hartman-Schijve equation [13][14][15][16][17][18], which is a variant [28] of the NASGRO equation, is often employed. The Hartman-Schijve methodology (a) allows for any effects in the FCG curves due to the values of K max and K min /K max , (b) provides a similitude parameter so that the FCG curves from a test specimen are directly comparable to the FCG seen in a real component, (c) enables the worst-case, upper-bound FCG curve to be determined, (d) enables the worst-case fatigue threshold value also to be deduced, and (e) takes into account the statistical scatter observed in the material and in the experimental test data on the values for the worst-case, upper-bound FCG curve and threshold value.…”

Section: The Hartman-schijve Methodologymentioning

confidence: 99%

“…In terms of ∆ √ G, the Hartman-Schijve equation may be expressed as in [11,[13][14][15][16][17][18]:…”

Section: The Hartman-schijve Methodologymentioning

confidence: 99%

“…Such FCG rate curves are essential for (a) sound material development, characterisation, and comparison studies, and (b) accurate design and lifing studies where their use is indeed mandated. Two different methodologies are proposed in the present paper based upon the Hartman-Schijve equation [13][14][15][16][17][18] and a novel simple-scaling equation. These are discussed in Sections 3.3 and 3.4, respectively.…”

Section: Overviewmentioning

confidence: 99%

“…To achieve these aims, two different methodologies are proposed. One is based upon the Hartman-Schijve equation [13][14][15][16][17][18], while the other is based on a novel simple-scaling equation. These approaches are employed to compute the experimentally measured FCG curves as a function of the pre-crack length, and to determine the worst-case, upper-bound FCG curves and the corresponding fatigue threshold limit values for the FCG curves.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

On Cyclic-Fatigue Crack Growth in Carbon-Fibre-Reinforced Epoxy–Polymer Composites

Michel,

Murphy,

Kinloch

et al. 2024

Polymers

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The growth of cracks between plies, i.e., delamination, in continuous fibre polymer matrix composites under cyclic-fatigue loading in operational aircraft structures has always been a very important factor, which has the potential to significantly decrease the service life of such structures. Whilst current designs are based on a ‘no growth’ design philosophy, delamination growth can nevertheless arise in operational aircraft and compromise structural integrity. To this end, the present paper outlines experimental and data reduction procedures for continuous fibre polymer matrix composites, based on a linear elastic fracture mechanics approach, which are capable of (a) determining and computing the fatigue crack growth (FCG) rate, da/dN, curve; (b) providing two different methods for determining the mandated worst-case FCG rate curve; and (c) calculating the fatigue threshold limit, below which no significant FCG occurs. Two data reduction procedures are proposed, which are based upon the Hartman-Schijve approach and a novel simple-scaling approach. These two different methodologies provide similar worst-case curves, and both provide an upper bound for all the experimental data. The calculated FCG threshold values as determined from both methodologies are also in very good agreement.

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Section: The Hartman-schijve Methodologymentioning

confidence: 99%

“…In terms of ∆ √ G, the Hartman-Schijve equation may be expressed as in [11,[13][14][15][16][17][18]:…”

Section: The Hartman-schijve Methodologymentioning

confidence: 99%

Section: Overviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On Cyclic-Fatigue Crack Growth in Carbon-Fibre-Reinforced Epoxy–Polymer Composites

Michel,

Murphy,

Kinloch

et al. 2024

Polymers

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show abstract

“…Indeed, variants of this approach have also been shown to be able to model delamination growth in composites as well as cohesive crack growth in adhesives and nanocomposites, see [31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

On the Link between Plastic Wake Induced Crack Closure and the Fatigue Threshold

Jones,

Ang,

Phan

et al. 2024

Metals

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This purpose of this paper is to examine the relationship between crack growth equations based on Elber’s original plastic wake induced crack closure concept and the fatigue threshold as defined by the American Society for Testing and Materials (ASTM) fatigue test standard ASTM E647-15el. It is shown that, for a number of conventionally manufactured metals, the function U(R), where R is the ratio of the minimum to maximum applied remote stress, that is used to relate the stress intensity factor ΔK to the effective stress intensity factor ΔKeff is inversely proportional to the fatigue threshold ΔKth(R). This finding also results in a simple closed form equation that relates the crack opening stress intensity factor Ko(R) to ΔK, Kmax, and the fatigue threshold terms ΔKth(R) and ΔKeff,th. It is also shown that plotting da/dN as function of ΔK/ΔKth(R) would appear to have the potential to help to identify the key fracture mechanics parameters that characterise the effect of test temperature on crack growth. As such, for conventionally manufactured metals, plotting da/dN as function of ΔK/ΔKth(R) would appear to be a useful addition to the tools available to assess the fracture mechanics parameters affecting crack growth.

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Effect of negative Poisson’s ratio architecture on fatigue life and output power of flexible wearable thermoelectric generators

Cui

Liu

Wang

et al. 2023

Engineering Fracture Mechanics

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Development and implementation of a simultaneous fatigue crack growth test setup for polymeric hybrid laminates

Cited by 15 publications

References 23 publications

On Cyclic-Fatigue Crack Growth in Carbon-Fibre-Reinforced Epoxy–Polymer Composites

On Cyclic-Fatigue Crack Growth in Carbon-Fibre-Reinforced Epoxy–Polymer Composites

On the Link between Plastic Wake Induced Crack Closure and the Fatigue Threshold

Effect of negative Poisson’s ratio architecture on fatigue life and output power of flexible wearable thermoelectric generators

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