Fatigue Behavior of Open-Holed CFRP Laminates with Initially Cut Fibers

Sudarsono, Sudarsono; Ogi, Keiji

doi:10.4236/ojcm.2017.71003

Cited by 12 publications

(10 citation statements)

References 11 publications

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“…As complex structures are often required in the industry, new composite manufacturing routes have to be developed and properties have to be examined. Sudarsono et al [172] investigated the influence of open holes on the fatigue performance of quasi isotropic ICF CFRP manufactured in autoclave (ICF-A) and through press moulding (ICF-P), and compared against standard CFRP (continuous fibre). They reported that the fatigue strength of ICF-P was about 20% that of the ICF-A, and was slightly higher than that of the continuous CFRP.…”

Section: Effect Of Open Holes and Notches On The Fatigue Properties Omentioning

confidence: 99%

The fatigue of carbon fibre reinforced plastics - A review

Alam

Mamalis

Robert

et al. 2019

Composites Part B: Engineering

253

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Engineering structures are often subjected to the conditions of cyclic-loading, which onsets material fatigue, detrimentally affecting the service-life and damage tolerance of components and joints. Carbon fibre reinforced plastics (CFRP) are high-strength, lowweight composites that are gaining ubiquity in place of metals and glass fibre reinforced plastics (GFRP) not only due to their outstanding strength-to-weight properties, but also because carbon fibres are relatively inert to environmental degradation and as such, show potential as corrosion resistant materials. The effects of cyclic loading on the fatigue of CFRP are detailed in several papers. As such, collating research on CFRP fatigue into a single document is a worthwhile exercise, as it will benefit the engineering-readership interested in designing fatigue resistant structures and components using CFRP. This review article aims to provide the most relevant and up-to-date information on the fatigue of CFRP. The review focuses in particular on defining fatigue and the mechanics of cyclically-loaded composites, elucidating the fatigue response and fatigue properties of CFRP in different forms, discussing the importance of environmental factors on the fatigue performance and service-life, and summarising the different approaches taken to modelling fatigue in CFRP.

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Section: Effect Of Open Holes and Notches On The Fatigue Properties Omentioning

confidence: 99%

The fatigue of carbon fibre reinforced plastics - A review

Alam

Mamalis

Robert

et al. 2019

Composites Part B: Engineering

253

View full text Add to dashboard Cite

show abstract

“…Therefore, intensive study on the fatigue behavior of notched FRP laminates is [ 1 , 2 , 3 , 4 ] required. Many researchers have studied the effect of holes within FRP composites [ 5 , 6 ] but only a few with regard to the layup arrangement and its effects on the strength of the material.…”

Section: Introductionmentioning

confidence: 99%

“…In ref. [ 1 , 2 , 4 , 5 , 6 , 7 , 8 ], many authors identified experimentally and numerically there is a high stress concentration around the edge of a hole. In ref.…”

Section: Introductionmentioning

confidence: 99%

Layup Configuration Effect on Notch Residual Strength in Composite Laminates

2018

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The current trend shows an increasing demand for composites due to their high stiffness to weight ratio and the recent progress in manufacturing and cost reduction of composites. To combine high strength and stiffness in a cost-effective way, composites are often joined with steel or aluminum. However, joining of thermoset composite materials is challenging because circular holes are often used to join them with their metal counterparts. These design based circular holes induce high stress concentration around the hole. The purpose of this paper is to focus on layup configuration and its impact on notch stress distribution. To ensure high quality and uniformity, the holes were machined by a 5 kW continuous wave (cw) CO2 laser. The stress distribution was evaluated and compared by using finite element analysis and Lekhnitskii’s equations. For further understanding, the notch strength of the laminates was compared and strain distributions were analyzed using the digital image correlation technique.

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“…6, No. 4;2017 Figure 2 shows the BZT-PFE1010-PX milling machine. With the help of two clamps, sample was tensioned on the work table and a perpendicular load was applied using a drill tool.…”

Section: Input Variables Variationmentioning

confidence: 99%

“…6, No. 4;2017 Measured matrix damage lengths of the individual samples were plotted over the different carbon fiber layers as shown in Figure 14. It becomes clear that at constant power of 750 W, matrix damage length for each layer decreases with increase in feed speed.…”

Section: Co 2 Laser Machinementioning

confidence: 99%

Study on the Quality of Quasi-Isotropic Composite Laminates Containing a Circular Hole

Balakrishnan¹,

Seidlitz²,

Ambrosio³

et al. 2017

JMSR

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Composite structures used in modern engineering applications are often subjected to circular holes in order to join with metal components via riveting, bolting or pinning joints. These design based holes will interrupt the force flux in the direction of the fibers and create high stress concentrations near the notched area. Objective of the project is to understand the quality of the quasi-isotropic composite laminates ([45°, -45°, 0°, 90°] S ) containing circular hole. To achieve this objective, a 3-phase portal milling machine and a 5kW continuous wave (cw) CO 2 laser system were used to produce the circular holes in the composite laminates. The processing parameters for both the processes are varied to understand its influence. The quality of the circular hole produced by these methods are further investigated and compared in order to arrive at the optimum processing parameters for the given quasi-isotropic composite laminates.The hole qualities were evaluated by means of delamination factor caused by milling; cone angle, matrix evaporation for cw-CO 2 laser system. For further comparisons, the optimal parameter combinations of both methods were selected for a tensile test according to the standard ASTM D5766-2002.

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Fatigue Behavior of Open-Holed CFRP Laminates with Initially Cut Fibers

Cited by 12 publications

References 11 publications

The fatigue of carbon fibre reinforced plastics - A review

The fatigue of carbon fibre reinforced plastics - A review

Layup Configuration Effect on Notch Residual Strength in Composite Laminates

Study on the Quality of Quasi-Isotropic Composite Laminates Containing a Circular Hole

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