Compliance based method for testing fatigue delamination propagation in laminates

Wilk, Jakub

doi:10.1016/j.engfracmech.2018.06.043

Cited by 13 publications

(5 citation statements)

References 12 publications

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“…The fatigue crack growth properties of composite materials have received considerable attention in the published literature [1,2], and several tests methods to determine these properties were proposed [3][4][5][6]. A fatigue crack growth test can be performed under various different conditions, for example: controlled using constant displacement (mostly used), load, or energy.…”

Section: Introductionmentioning

confidence: 99%

Effect of aging on the fatigue crack growth properties of carbon-polyamide 6 thermoplastic composites using the multi ΔG-control method

Arhant

Lolive

Bonnemains

et al. 2022

Composites Part A: Applied Science and Manufacturing

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Section: Introductionmentioning

confidence: 99%

Effect of aging on the fatigue crack growth properties of carbon-polyamide 6 thermoplastic composites using the multi ΔG-control method

Arhant

Lolive

Bonnemains

et al. 2022

Composites Part A: Applied Science and Manufacturing

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“…Mode II crack onset and propagation. In some respects, the proposed implementation of the MTCT test under strain or displacement control conditions provides similar advantages to those described in other compliance methods such as DCB for Mode I and ENF for Mode II when applying displacement control[7,16]. At the same time, some drawbacks typical of…”

mentioning

confidence: 78%

“…Moreover, the amount of crack growth rate curve swept in a single test is generally small, and not sufficient to effectively characterize the sub-critical crack growth domain [7]. A way to overcome such limitation is performing tests on different samples and various constant cyclic displacement [16], but this remains oneorus in terms of time and material needed. In [7] it is proposed an automated procedure able to apply different cyclic displacement ranges on a single sample under the same fatigue cycling test.…”

Section: Introductionmentioning

confidence: 99%

A methodology for the rapid characterization of Mode II delamination fatigue threshold in FRP composites

Pitarresi

Scalici

Dellaira

et al. 2019

Engineering Fracture Mechanics

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A new methodology to measure the Mode II interlaminar fracture in fatigue for FRP composites is developed. The proposed methodology uses a Modified Transvers Crack Tensile (MTCT) specimen and is able to characterise the near threshold behaviour in a robust, easier and significantly faster way than standard procedures. Analytical formulae, able to link the crack growth rate to the load or strain amplitudes, were found and verified, and their importance was explained, in particular, for what concerns the characterisation of the near threshold behaviour. Experiments were performed both in load and strain control, while the delamination growth was monitored using different techniques including the Thermoelastic Stress Analysis (TSA). Experiments showed the reliability and effectiveness of the proposed procedure, and evidence its suitability and compatibility with current industrial material testing and qualification protocols with particular emphasis to industrial environment where a "no growth" design approach is employed.

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“…This CBBM method for evaluation of the effective crack length, which considers the effect of arm rotation in DCB specimens at the delamination front with the incorporation of correction term. This effective crack length evaluation method is derived based on corrected beam theory (Wilk, 2018):…”

Section: Test Proceduresmentioning

confidence: 99%

Mode-I fracture control of unidirectional laminated composites using MFC actuators

Kaushik

Siddgonde

Narita

et al. 2022

Journal of Intelligent Material Systems and Structures

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This article presents an experimental and numerical investigation of Mode-I fracture control in aerospace grade unidirectional laminated composites (AS4/914) using the smart material approach. The P1 type macro fiber composites (MFC) actuators are selected for current research because of their higher free strain, high mechanical flexibility, and good blocking force. The opening mode (Mode-I) interlaminar fracture tests have been carried out on DCB specimens having surface bonded MFC actuator patches under the application of electric voltage within a range of 0–1500 V. These fracture control tests have been performed on pre-cracked (PC) and non pre-cracked (NPC) double cantilever beam specimens. The modified pin force model has been adopted for the evaluation of actuation forces in surface bonded MFC actuators. The XIGA-CZM based numerical formulation is utilized for numerical fracture modeling under electromechanical loading conditions. The MFC actuators have significant control over Mode-I fracture energy under the application of peak operating voltage. The numerical model using a modified pin force model in combination with XIGA-CZM based fracture model shows a good agreement with experimental observations.

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Compliance based method for testing fatigue delamination propagation in laminates

Cited by 13 publications

References 12 publications

Effect of aging on the fatigue crack growth properties of carbon-polyamide 6 thermoplastic composites using the multi ΔG-control method

Effect of aging on the fatigue crack growth properties of carbon-polyamide 6 thermoplastic composites using the multi ΔG-control method

A methodology for the rapid characterization of Mode II delamination fatigue threshold in FRP composites

Mode-I fracture control of unidirectional laminated composites using MFC actuators

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