Durability-based design criteria for a chopped-glass-fiber automotive structural composite

Corum, J.M.; Battiste, R.L.; Ruggles, M.B.; Ren, Weiju

doi:10.1016/s0266-3538(00)00242-6

Cited by 40 publications

(34 citation statements)

References 6 publications

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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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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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“…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%

“…† As was done for the previous glass-and carbon-fiber composites investigated, a design curve was developed by taking 80% of the minimum creep-rupture strength. 1,3,4 Because of the paucity of failure data, the "minimum" curve was established by simply shifting the original solid curve down to bound all of the data points.…”

Section: Room-temperature Tensile Failuresmentioning

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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“…Considerable efforts have been dedicated to employ materials with lightweight structures, which are highly desirable to be used to increase energy efficiencies in different commercial and industrial divisions (Corum et al, 2001;Dahl et al, 2005;Jacob et al, 2006). The thermo-mechanical properties of randomly dispersed particles or fiber reinforced composites (PRC or FRC) are of paramount importance for their special applications in lightweight structures (Pan et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Microstructure-Based Computational Modeling of Mechanical Behavior of Polymer Micro/Nano Composites

Tehrani¹

2013

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Lightweight advanced materials are critical in the manufacturing of many Army vehicles. Recently, numerical tools have been utilized to customize experiments to achieve optimized behavior of micro/nano polymer composites (MNPCs). Most numerical studies are based on characterizing the MNPCs through simple microstructures, as circular particles or straight fibers embedded in a specific polymer matrix. Although these geometries are effective in virtually modeling some types of composite material behavior, they fail to address some critical key Names of Under Graduate students supportedPERCENT_SUPPORTED NAME FTE Equivalent:Total Number:The number of undergraduates funded by this agreement who graduated during this period with a degree in science, mathematics, engineering, or technology fields:The number of undergraduates funded by your agreement who graduated during this period and will continue to pursue a graduate or Ph.D. degree in science, mathematics, engineering, or technology fields:Number of graduating undergraduates who achieved a 3.5 GPA to 4.0 (4.0 max scale): Number of graduating undergraduates funded by a DoD funded Center of Excellence grant for Education, Research and Engineering:The number of undergraduates funded by your agreement who graduated during this period and intend to work for the Department of DefenseThe number of undergraduates funded by your agreement who graduated during this period and will receive scholarships or fellowships for further studies in science, mathematics, engineering or technology fields: Student Metrics This section only applies to graduating undergraduates supported by this agreement in this reporting periodThe number of undergraduates funded by this agreement who graduated during this period: 0.00 ...... Names of Personnel receiving masters degrees Inventions (DD882) Scientific ProgressBecause the mechanical responses of polymers and many types of polymer composites are in the large deformation range, the Eulerian or Lagrangian concept is required for measuring the stress and strain. On the other hand, developing a large deformation based constitutive model requires a number of considerations, and should be performed from a thermodynamics point of view to study the motion of each component of the material. Even though such approach is precise and physically sound, it is limited to just one type of material. Furthermore, polymers show high dependency to the rate and time of the applied load; hence, employing viscoelastic, viscoplastic and viscodamage models is necessary. To address these issues, a consistent framework is developed to generalize elastic/viscoelastic and plastic/viscoplastic models from small strain to the large deformation range. The developed continuum based app...

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Durability-based design criteria for a chopped-glass-fiber automotive structural composite

Cited by 40 publications

References 6 publications

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

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

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

Microstructure-Based Computational Modeling of Mechanical Behavior of Polymer Micro/Nano Composites

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