Durability-Based Design Guide for an Automotive Structural Composite: Part 2. Background Data and Models

Corum, J.M.; Battiste, R.L.; Brinkman, C.R.; Ren, Weiju; Ruggles, M.B.; Weitsman, Y.; Yahr, G.T.

doi:10.2172/16716

Cited by 16 publications

(11 citation statements)

References 3 publications

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“…A previous investigation of the reference material indicated that dry specimens had yielded low creep deformation at room temperature [7]. Obviously, heating at 50 C was able to dehydrate the specimen but the temperature was not high enough to induce significant increase in creep deformation.…”

Section: (9mentioning

confidence: 95%

Time-Dependent Deformation Modelling for a Chopped-Glass Fiber Composite for Automotive Durability Design Criteria

Ren¹

2001

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Time-dependent deformation behavior of a polymeric composite with chopped-glass-fiber reinforcement was investigated for automotive applications, The material under stress was exposed to representative automobile service environments. Results show that environment has substantial effects on time-dependent deformation behavior of the material. The data were analyzed and experimentally-based models developed for the time-dependent deformation behavior as a basis for automotive structural durability design criteria.

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Section: (9mentioning

confidence: 95%

Time-Dependent Deformation Modelling for a Chopped-Glass Fiber Composite for Automotive Durability Design Criteria

Ren¹

2001

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“…The viscoelastic properties of these materials are displayed in Table 6. The experimental data was obtained from the project conduct by the Oak Ridge National laboratory [50], [51], [52], [53], [54], [55] to develop experimentally based, durability-driven design guidelines to assure the long-term integrity of representative thermoset composite systems to be used to produce large structural automotive components. These examples include different types of reinforcements; E glass fibre randomly orientated chopped strands and continuous strand, swirl-mat fibre and continuous T300 carbon fibre.…”

Section: Thermosetting Polymer-based Compositesmentioning

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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“…For the random-glass-fiber composites previously evaluated, Miner's rule was recommended. [1][2][3] The choice for the glass composites was based on a very limited number of block loading tests in each case and was thus not well based statistically.…”

Section: Treatment Of Varying Stress Amplitudesmentioning

confidence: 99%

“…9.31(a), was that used for tests on each of the previous three composite materials. [2][3][4] Because the quasi-isotropic material is thinner than the previous three composites2 mm vs 3 mmand because future materials may be even thinner and even more prone to buckling, it was decided to evaluate a modified specimen having a shorter length and smaller radius in the hourglass section. This "new" specimen is shown in Fig.…”

Section: Mean Stress Effectsmentioning

confidence: 99%

“…The first two reports addressed random-glass-fiber composites-one with swirled continuous-strand-mat reinforcement and one with chopped-fiber reinforcement. [1][2][3][4] The third report was the first to address a carbon-fiber composite and focused on a reference [±45°] 3S crossply composite. 4 This fourth report addresses a quasi-isotropic, [0/90°/±45°] S , version of the reference crossply; the matrix and individual ±45° stitch-bonded mats are the same in both cases.…”

Section: Introductionmentioning

confidence: 99%

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Durability-Based Design Criteria for a Quasi-Isotropic Carbon-Fiber Automotive Composite

Corum¹

2002

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Durability-Based Design Guide for an Automotive Structural Composite: Part 2. Background Data and Models

Cited by 16 publications

References 3 publications

Time-Dependent Deformation Modelling for a Chopped-Glass Fiber Composite for Automotive Durability Design Criteria

Time-Dependent Deformation Modelling for a Chopped-Glass Fiber Composite for Automotive Durability Design Criteria

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

Durability-Based Design Criteria for a Quasi-Isotropic Carbon-Fiber Automotive Composite

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