Fatigue fracture behaviour of PEEK: 1. Effects of load level

Brillhart, M.; Gregory, Bryan; Botsis, J.

doi:10.1016/0032-3861(91)90395-y

Cited by 24 publications

(16 citation statements)

References 12 publications

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“…This was inferred by the examination of fracture surfaces, transverse sections, and by the comparison of energy release rates and crack opening displacements calculated on the basis of linear elastic fracture mechanics and the experimentally measured ones. Similar phenomena were observed with changes in the stress level of the fatigue cycle [2]. In the case of the specimen with t = 5.42 mm, &dquo;brittle&dquo; fracture dominated throughout the slow crack propagation phase.…”

Section: Introductionsupporting

confidence: 72%

“…Deviations between the calculated energy release rates and G, were observed in the &dquo;ductile&dquo; phase of crack growth [2]. It is of interest to note that in spite of the limitations associated with unloading, energy release rates evaluated from load displacement curves, at long crack lengths, were practically equal to J, = or,6 (where Q, is the yield stress of the material and 6 is the crack tip opening displacement).…”

Section: Introductionmentioning

confidence: 98%

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Fatigue Fracture Behavior of PEEK

Brillhart

Botsis

1993

Journal of Reinforced Plastics and Composites

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Experimental results on fatigue crack propagation in PEEK under different load levels, specimen thickness, and environmental temperatures reported in References [1] and [2] are analyzed. When the kinetic data is plotted against J 1 = σ v & d e l t a ; (where σ v is the yield stress of the material and & d e l t a ; is the crack tip opening displacement), the crack speed is practically independent of the load level, specimen thickness, and environmental temperatures up to 75°C. The experimental data is confronted with a power type kinetic equation and the kinetic equation of the crack layer model. The analysis indicates that both kinetic equations describe well the data under a wide spectrum of loading conditions.

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Section: Introductionsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 98%

Fatigue Fracture Behavior of PEEK

Brillhart

Botsis

1993

Journal of Reinforced Plastics and Composites

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“…Many previous studies of the fatigue properties of PEEK were focused on the fatigue crack propagation behavior of PEEK [37,38] and stress-life (S-N) behavior. Tang et al [39] investigated the HA/PEEK composites subjected to tension-tension fatigue under load-controlled load, they found that all of the specimen could withstand 50% ultimate tensile strength, which they attribute to the polymer chain re-orientation and stress-induced crystallization.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of multiaxial fatigue life prediction criteria for PEEK

Wang

Shi

et al. 2014

Theoretical and Applied Fracture Mechanics

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“…The crack growth behavior of PEEK has been studied using a fracture mechanics perspective [87,88]. However, the fatigue behavior of CFR-PEEK is complex, as it involves interactions between the polymer and fiber [89].…”

Section: Mechanical Behaviormentioning

confidence: 99%

PEEK biomaterials in trauma, orthopedic, and spinal implants

Kurtz

Devine²

2007

Biomaterials

2,022

1,518

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Since the 1980s, polyaryletherketones (PAEKs) have been increasingly employed as biomaterials for trauma, orthopedic, and spinal implants. We have synthesized the extensive polymer science literature as it relates to structure, mechanical properties, and chemical resistance of PAEK biomaterials. With this foundation, one can more readily appreciate why this family of polymers will be inherently strong, inert, and biocompatible. Due to its relative inertness, PEEK biomaterials are an attractive platform upon which to develop novel bioactive materials, and some steps have already been taken in that direction, with the blending of HA and TCP into sintered PEEK. However, to date, blended HA-PEEK composites have involved a trade-off in mechanical properties in exchange for their increased bioactivity. PEEK has had the greatest clinical impact in the field of spine implant design, and PEEK is now broadly accepted as a radiolucent alternative to metallic biomaterials in the spine community. For mature fields, such as total joint replacements and fracture fixation implants, radiolucency is an attractive but not necessarily critical material feature.

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Fatigue fracture behaviour of PEEK: 1. Effects of load level

Cited by 24 publications

References 12 publications

Fatigue Fracture Behavior of PEEK

Fatigue Fracture Behavior of PEEK

Evaluation of multiaxial fatigue life prediction criteria for PEEK

PEEK biomaterials in trauma, orthopedic, and spinal implants

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