Effects of scratch damage on progressive failure of laminated carbon fiber/epoxy composites

Shams, Seyedmohammad; Elhajjar, Rani

doi:10.1016/j.ijmecsci.2012.12.008

Cited by 33 publications

(12 citation statements)

References 27 publications

(27 reference statements)

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“…Aluminum reinforced with carbonous materials, such as graphite, is known as a selflubricating aluminum matrix composite. Graphite particles act as solid lubricant at the contact interface, which enhance the tribological properties of these composites compared to unreinforced aluminum alloys or aluminum alloys reinforced by non-carbonous ceramic particles [32,82,83]. In general, solid lubricants to fabricate self-lubricating composites are solid carbon (carbon fibers [84][85][86], graphite particles [87][88][89][90][91], CNTs, graphene), molybdenum disulfide, and hexagonal boron nitride [2, 16,81].…”

Section: Self-lubricated Aluminum Compositesmentioning

confidence: 99%

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Omrani

Moghadam

Menezes

et al. 2015

Int J Adv Manuf Technol

143

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Aluminum/graphite (Al/Gr) composites have been used as self-lubricating materials due to the superior lubricating effect of graphite during sliding. This paper summarizes various tribological aspects of self-lubricating aluminum composites. The influence of various factors such as (a) material factors, graphite size and volume fraction, and (b) mechanical factors, applied load and sliding speed on the tribological properties of self-lubricating aluminum composites, is discussed. Furthermore, the tribological properties of selflubricating composites as a function of these parameters and the active wear mechanism involved in various systems are discussed. Bringing self-lubricating composites into different operating systems is a solution to reduce the use of external toxic petroleum-based lubricants in sliding contacts in a way to help the environment and reduce energy dissipation in industrial components for strategies toward sustainability and energy efficiency.

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Section: Self-lubricated Aluminum Compositesmentioning

confidence: 99%

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Omrani

Moghadam

Menezes

et al. 2015

Int J Adv Manuf Technol

143

View full text Add to dashboard Cite

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“…Huang [9] proved that manufacturing defects lead to a sharp drop in the strength and stiffness of composites, and that the decrease in residual strength and stiffness is related to the form and size of defects or damage. Shams [10] studied the effect of three scratch depths on the tensile strength of laminates and found that the position of the scratched tip and the depth of scratches are the key factors to the load capacity of composites. In addition, this resulted in unexpected compression and torsional deformation of the laminate.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, effects of notches on mechanical properties of laminates are studied in the present work. Based on a previous study [10], as for the tensile or fatigue test of singleedge notch laminates can cause additional torque which might results in the deterioration of mechanical properties, double-edge notches were selected, so as to balance the effect of torque on mechanical properties. Both static and fatigue test were carried out to determine the effects of double-edge notch on mechanical performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of notch on static and fatigue properties of T800 fabric reinforced composites

Huang

Zeng³

et al. 2020

Science and Engineering of Composite Materials

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To investigate the effect of notches on static and fatigue properties of T800 fabric carbon fibre reinforced epoxy, comparative tests were conducted between specimens of three depths of notches and un-notched specimens. Results demonstrate that the residual tensile strength of specimens is linearly decreased with the increasing depth of notches from 2mm to 4mm. The tensile strength on notched specimens dropped 31.5% comparing with no-damaged laminate. Due to the effect of notches, the fatigue limit was reduced to 55% of UTS and the slope of the S-N curve tends to be horizontal. In-situ damage expansion process was observed and the shape of proposed normalized S-N curves could be explained and concluded as two stages: the first stage accounts for 20% of the fatigue life, showing a dramatic decrease of fatigue strength; the remaining stage takes up the rest of the total life span, representing a steady decline in strength. It shows that no-damaged and notched laminates exhibit different behaviours in terms of damage evolution.

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“…Generally, the manufacturers provide the properties of the fiber sheets, such as Young's modulus and design sheet thickness, based on the tests in laboratories. However, when it is used in field, the properties of the FRP are affected by the curing process and defects such as gouges or deep scratches which may occur through the instalment of FRP [7,8]. Typically it is difficult to get the same level of quality control for wet lay-up FRP as for the FRP plates or strips precured in the factory.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Load Capacity Variation in FRP Bonded Concrete Specimens Using Brownian Motion

Mohammadi

Wan

Dai

et al. 2015

Mathematical Problems in Engineering

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In wet lay-up process, dry fiber sheets are saturated with a polymer and applied to the concrete surface by hand. This causes relatively large variation in properties of the cured FRP composite material. It is hard to know the exact mechanical properties of the FRP constructed by wet lay-up process. In addition, the stiffness of FRP changes during debonding process due to different amount of concrete attached to the debonded FRP at different locations. It is also inevitable to have considerable variations in the strength of concrete. Therefore, the behaviour of FRP bonded concrete members varies among specimens even when the same materials are used. The variation of localized FRP stiffness and concrete strength can be combined in a single parameter as variation of the localized interfacial fracture energy. In an effort to effectively model the effects of the variation of interfacial fracture energy on the load versus deflection responses of FRP bonded concrete specimens subjected to Mode I and Mode II loading, a random white noise using a one-dimensional standard Brownian motion is added to the governing equations, yielding stochastic differential equations. By solving these stochastic equations, the bounds of load carrying capacity variation with 95% probability are found for different experimental tests.

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Effects of scratch damage on progressive failure of laminated carbon fiber/epoxy composites

Cited by 33 publications

References 27 publications

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Effect of notch on static and fatigue properties of T800 fabric reinforced composites

Prediction of Load Capacity Variation in FRP Bonded Concrete Specimens Using Brownian Motion

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