Fatigue mechanisms in unidirectional glass-fibre-reinforced polypropylene

Gamstedt, E. Kristofer; Berglund, Lars A.; Peijs, T.

doi:10.1016/s0266-3538(98)00119-5

Cited by 113 publications

(99 citation statements)

References 14 publications

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“…Further study comparing both systems impacted at the same energy would be required to confirm the influence of particles on matrix cracks. Such ineffectiveness of interlaminar particle toughening to reduce intralaminar damage may be identified as a weakness in cases where water ingress [40] or post-impact fatigue damage growth [41] are of concern.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional assessment of low velocity impact damage in particle toughened composite laminates using micro-focus X-ray computed tomography and synchrotron radiation laminography

Bull

Spearing

Sinclair

et al. 2013

Composites Part A: Applied Science and Manufacturing

100

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Results are presented studying the contribution of particle toughening to impact damage resistance in carbon fibre reinforced polymer materials. Micro-focus Xray computed tomography and synchrotron radiation computed laminography were used to provide a novel, multiscale approach for assessing impact damage. Thin (1mm thick) composite plates containing either untoughened or particle-toughened resin systems were subjected to low velocity impact.Damage was assessed three-dimensionally at voxel resolutions of0.7 µm and 4.3 µm using SRCL and µCT respectively; the former being an innovative approach to the laterally extended geometry of CFRP plates. Observations and measurements taken from µCT scans captured the full extent of impact damage on both material systems revealing an interconnected network of intra-and inter-laminar cracks. These lower resolution images reveal that the particletoughened system suppresses delaminations with little effect on intralaminar 1 damage. The higher resolution images reveal that the particles contribute to toughening by crack deflection and bridging.

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Section: Discussionmentioning

confidence: 99%

Three-dimensional assessment of low velocity impact damage in particle toughened composite laminates using micro-focus X-ray computed tomography and synchrotron radiation laminography

Bull

Spearing

Sinclair

et al. 2013

Composites Part A: Applied Science and Manufacturing

100

View full text Add to dashboard Cite

show abstract

“…This growth of the effective recovery length will lead to an evolution of the stress fields within the fibres and interface of the level- [1] bundle, leading to three district fatigue phases, as will be described next.…”

Section: Fatigue Lifementioning

confidence: 97%

“…Considering the scenarios described in the previous section, we have previously derived [9] the following hierarchical scaling law to predict the survival probability of a level- [1] bundle (for clarity, the dependence of the survival probabilities on ∞ will be omitted): The first term on the right-hand side of Equation 10a corresponds to the no level-[ ] breaks scenario (under static or fatigue loading), and can be defined as [1] ( ∞ , ) [9] = […”

Section: Hierarchical Scaling Lawmentioning

confidence: 99%

“…The second term on the right-hand side of Equation 10a corresponds to the one level-[ ] break scenario (under static or fatigue loading), and can be defined as [1] ( ∞ , )…”

Section: Hierarchical Scaling Lawmentioning

confidence: 99%

“…The resulting level-[1] survival probability is calculated at the level- [1] control length (which represents the shortest statistically independent partition of the bundle) [9]: [1] c ( ∞ , ) [9] = min {2 ⋅…”

Section: Hierarchical Scaling Lawmentioning

confidence: 99%

See 2 more Smart Citations

Predicting damage accumulation and fatigue life of UD composites under longitudinal tension

Pimenta

Mersch

Alves

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Effects of debonding and fiber strength distribution on fatigue-damage propagation in carbon fiber-reinforced epoxy

Gamstedt

2000

J. Appl. Polym. Sci.

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In order to design new fatigue-resistant composites, the underlying fatigue damage mechanisms must be characterized and the controlling microstructural properties should be identified. The fatigue-damage mechanisms of a unidirectional carbon fiber-reinforced epoxy has been studied under tension-tension loading. A ubiquitous form of damage was one or a few planar fiber breaks from which debonds or shear yield zones grew in the longitudinal direction during fatigue cycling. This leads to a change in stress profile of the neighboring fibers, and an increase in failure probability of these fibers. The breakage of fibers in the composite is controlled by the fiber strength distribution. The interaction between the fiber strength distribution and debond propagation leading to further fiber breakage was investigated by a numerical simulation. It was found that a wider distribution of fiber strength and a higher debond rate lead to more distributed damage and a higher fracture toughness. Implications to fatigue life behavior are discussed, with reference to constituent microstructure.

show abstract

Fatigue mechanisms in unidirectional glass-fibre-reinforced polypropylene

Cited by 113 publications

References 14 publications

Three-dimensional assessment of low velocity impact damage in particle toughened composite laminates using micro-focus X-ray computed tomography and synchrotron radiation laminography

Three-dimensional assessment of low velocity impact damage in particle toughened composite laminates using micro-focus X-ray computed tomography and synchrotron radiation laminography

Predicting damage accumulation and fatigue life of UD composites under longitudinal tension

Effects of debonding and fiber strength distribution on fatigue-damage propagation in carbon fiber-reinforced epoxy

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