The Nonlinear Viscoelastic Response of Resin Matrix Composites

Hiel, C.; Brinson, H. F.; Cardon, Albert

doi:10.1007/978-94-009-6640-6_20

Cited by 63 publications

(38 citation statements)

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“…Consequently, this history suggests the need for a coupled viscoelastoplastic constitutive model as utilized herein. Furthermore, the neat and logical partitioning of the stored and dissipative parts of the total energy, underlying our present framework is directly applicable in the context of recent design/critical energy failure criteria for PMC systems [17,18,19]. Moreover, unlike some of these latter developments (e.g., the NMC and the RW approaches in reference [19]), the present framework allows for calculation of deformations beyond the "yield" point and in the post creep-rupture regimes, for some examples, see reference [24] for general coupled viscoelastoplastic-damage applications.…”

Section: Materials Modelmentioning

confidence: 98%

“…Alternatively, comparatively few studies are available on the effect of time dependency in flywheel applications, with the majority of those conducted making use of classical viscoelasticity, i.e., hereditary-integral type assumption, [2][3][4][5][6][7][8][9][10][11]. Further complications, arise from the fact that despite the ample evidence of various types of material time dependency, particularly for PMC systems [12][13][14][15][16][17][18][19]; the underlying fundamental character of the time-dependent behavior (i.e., reversible vs. irreversible) and its ramifications (through constitutive modeling) in structural applications (e.g., flywheels) has not been carefully examined and critically assessed. For instance, in PMC literature, the irreversibility of the material is often masked by such practices as mechanically conditioning the material, e.g., prior to creep/creep-recovery tests, or subtraction of the permanent strain from the creep recovery data, etc.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, in PMC literature, the irreversibility of the material is often masked by such practices as mechanically conditioning the material, e.g., prior to creep/creep-recovery tests, or subtraction of the permanent strain from the creep recovery data, etc. ; thus justifying the utilization of a predetermined simplified constitutive theory, for example linear or nonlinear viscoelasticity, [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Study of Time-dependent and Anisotropic Effects on the Deformation Response of Two Flywheel Designs

Saleeb

Arnold

Al-Zoubi

2003

Composite Materials: Testing and Design, Fourteenth Volume

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The influence of material time dependency and anisotropy in the context of two specific flywheel designs -preload and multi-directional composite (MDC)- is investigated. In particular, we focus on the following aspects: 1) geometric constraints, 2) material constraints, 3) loading type, and 4) the fundamental character of the time-dependent response, i.e., reversible or irreversible. The bulk of the results presented were obtained using a composite (PMC IM7/8552 @135° C) material system. The material was characterized using a general multimechanism hereditary (viscoelastoplastic) model. As a general conclusion, the results have clearly shown that both the preload and the MDC rotor designs are significantly affected by time-dependent material behavior, which may impact the state of rotor balance and potentially reduce its operating life. In view of the results of the parametric studies and predictions made in the present study, the need for actual experimentation focusing on the time-dependent behavior of full-scale flywheel rotors is self-evident.

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Section: Materials Modelmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Study of Time-dependent and Anisotropic Effects on the Deformation Response of Two Flywheel Designs

Saleeb

Arnold

Al-Zoubi

2003

Composite Materials: Testing and Design, Fourteenth Volume

View full text Add to dashboard Cite

show abstract

“…the predictions were within the same magnitude of the experimental data. Hiel [15] applied the Reiner-Weissenberg criterion to the very same experimental data with some promising results. Latter Raghavan & Meshii [16], [17] presented a creep-rupture model, based on a creep model and a critical fracture criterion, and applied it to a high Tg epoxy and its carbon fibre reinforced composites with good results.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless the global and homogeneous analysis, simpler to formulate and solve, is more appropriated for practical applications. Hiel [15], [32] in fact states that the failure should be a part of a complete constitutive description of the material. Brinson [33] argued that this approach could simplify the procedure to predict the delayed failure in structural polymers without loosing the necessary accuracy.…”

Section: Introductionmentioning

confidence: 99%

Time-dependent failure criteria for lifetime prediction of polymer matrix composite structures

Guedes

2011

Creep and Fatigue in Polymer Matrix Composites

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The use of fibre -reinforced polymers in civil construction applications originated structures with a high specific stiffness and strength. Although these structures usually present a high mechanical performance, their strength and stiffness may decay significantly over time. This is mainly due to the viscoelastic nature of the matrix, damage accumulation and propagation within the matrix and fibre breaking. One serious consequence, as a result of static fatigue (creep failure), is a premature failure which is usually catastrophic. However in civil engineering applications, the structural components are supposed to remain in service for 50 years or more in safety conditions.One argument used to replace steel by polymer-matrix composites is its superior corrosion resistance. Yet stress corrosion of glass fibre s takes place as soon as moisture reaches the fibre by absorption. This phenomenon accelerates fibre breaking. In most 2 civil engineering applications, glass-fibre reinforced polymers (GRP) are the most common especially because raw material is less expensive.The lack of full understanding of the fundamental parameters controlling long-term materials performance necessarily leads to over-design and, furthermore, inhibits greater utilization. In this context, lifetime prediction of these structures is an important issue to be solved before wider dissemination of civil engineering applications can take place. As an example, standards dealing with certification of GRP pipes require at least 10000 hours of testing for a high number of specimens. Even though these strong requirements may be foreseen as reasonable, concerning the safety of civil engineering applications, they severely restrict the improvement and innovation of new products.The present chapter reviews some theoretical approaches for long-term criteria. Timedependent failure criteria will be presented and developed for practical applications and illustrated with experimental cases.

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