Influence of the principal tensile stresses on delamination fracture mechanisms and their associated morphology for different loading modes in carbon/epoxy composites

Mollón, V.; Bonhomme, J.; Viña, J.; Argüelles, A.; Fernández‐Canteli, Alfonso

doi:10.1016/j.compositesb.2011.07.018

Cited by 23 publications

(16 citation statements)

References 10 publications

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“…This indicates that the preferential advance of the fracture is produced via the fiber/matrix interface associated with mode I fracture. Matrix rollers and cusps, associated with mode II fracture, can also be observed in this figure.…”

Section: Fractographic Studymentioning

confidence: 73%

Study of Fatigue Behavior of Epoxy‐Carbon Composites under Mixed Mode I/II Loading

et al. 2017

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This paper presents an experimental assessment of the initiation and propagation of interlaminar cracks under mixed mode I/II dynamic fracture loading of a composite material with an MTM45-1 epoxy matrix and unidirectional IM7 carbon-fiber reinforcement. The aims of the experimental program developed for this purpose are to determine, on the one hand, the initiation curves of the fatigue delamination process, understood as the number of load cycles needed to generate a fatigue crack, and on the other, the crack growth rate (delamination rate) for different percentages of static Gc, in both cases for two mode mixities (0.2 and 0.4) and for a tensile ratio R ¼ 0.1. All this with the goal of quantifying the influence of the degree of mode mixity on the overall behavior of the laminate under fatigue loading. The results show that the energy release rate increases with increasing loading levels for both degrees of mode mixity and that the fatigue limit is located around the same percentages. However, crack growth rate behavior differs from one degree of mode mixity to the other. This difference in the behavior of the material may be due to the varying influence of mode I loading on the delamination process.

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Section: Fractographic Studymentioning

confidence: 73%

Study of Fatigue Behavior of Epoxy‐Carbon Composites under Mixed Mode I/II Loading

et al. 2017

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“…For structures the behavior of the delamination is much like the CLS configuration, in which a combination of modes I, II and even III acts at the crack tip characterizing a mixed mode propagation. Consequently, the fracture morphology will be different from that in pure modes of propagation [14].…”

Section: Introductionmentioning

confidence: 96%

“…In general, the mode I component produces predominantly a smooth surface characterized by scarp formation that represents the action of peel stresses; meanwhile, the mode II component creates a surface roughness that is interpreted as shear stress dominant failure mode [9,11,12]. The scarp fracture pattern is formed by the coalescence of riverlines also related to the plastic microcreep fracture mechanism, which grows from neighboring fibers and converges into scarps [13][14][15]. Besides, riverlines may also indicate the crack propagation direction [13].…”

Section: Introductionmentioning

confidence: 99%

The relationship between pure delamination modes I and II on the crack growth rate process in cracked lap shear specimen (CLS) of 5 harness satin composites

Shiino

Alderliesten

Donadon

et al. 2015

Composites Part A: Applied Science and Manufacturing

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Carbon fiber reinforced polymers (CFRP) structure can include dropping-off plies in order to comply with design requirements aiming at significant weight savings. However this type of discontinuity represents a potential source of delamination initiation and propagation which requires assessment of the mechanisms acting at the crack tip. This research investigates the influence of delamination modes I and II on the overall damage process observed in CLS specimen subjected to cyclic loads. The main contribution of this work focuses on the identification and physical interpretation of complex failure mechanisms in harness satin fabric. For this purpose a detailed fractographic analysis was carried out to qualitatively assess the surface fractures in these type of laminates. Results obtained for cyclic loaded CLS specimens were compared to analytical closed form solutions available in the literature. Results indicated that delamination front exhibited distinguishable delamination modes I and II propagating at constant mixed mode ratio (G I /G T).

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“…On the contrary, surfaces preparation, adherents and adhesives types, the joint thickness and the temperature, must be studied during the manufacturing process [1]. It is known that the joining method is influenced by the breaking process, the way of breaking and the strength of the joint [2,3].…”

Section: Introductionmentioning

confidence: 99%

Analyses of Different Adhesives on Pure Mode I and Mode II Delamination Growth of Composite Bonded Joints

Sánchez

Coronado

Argüelles

et al. 2018

The 2nd International Research Conference on Sustainable Energy, Engineering, Materials and Environment

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This work aims to study the behaviour against delamination under static modes I and II of adhesive bonded joints in unidirectional carbon-fibre/epoxy prepreg. The double cantilever beam and end notched flexure tests were used to characterize the influence on the interlaminar fracture toughness under pure mode I and pure mode II, respectively. Three structural adhesives from different manufacturers were tested in comparison with the original material, that is, without adhesive bonded. The fracture surfaces were also examined for each joint system.

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Influence of the principal tensile stresses on delamination fracture mechanisms and their associated morphology for different loading modes in carbon/epoxy composites

Cited by 23 publications

References 10 publications

Study of Fatigue Behavior of Epoxy‐Carbon Composites under Mixed Mode I/II Loading

Study of Fatigue Behavior of Epoxy‐Carbon Composites under Mixed Mode I/II Loading

The relationship between pure delamination modes I and II on the crack growth rate process in cracked lap shear specimen (CLS) of 5 harness satin composites

Analyses of Different Adhesives on Pure Mode I and Mode II Delamination Growth of Composite Bonded Joints

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