Strain Rate Effects in Composites

Sierakowski, Robert L.

doi:10.1115/1.3101860

Cited by 125 publications

(82 citation statements)

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“…To perform the loading, it hits a shoulder put at the end of the loading bar. With this kind of device, strain rates up to 10 3 s −1 can typically be obtained [19]. A review of the use of SHPB can be found in [27].…”

Section: Methodsmentioning

confidence: 99%

“…There have been many other high strain rate characterizations of composite materials using various adaptations of Hopkinson bar and drop weight impactors since these early experimental results [18,19]. The general trend is for increasing stiffness with increasing strain rate, particularly in the case of glass fibre composites e.g.…”

Section: Dynamic Behaviour Of Laminated Compositesmentioning

confidence: 99%

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Full-Field Strain Measurement and Identification of Composites Moduli at High Strain Rate with the Virtual Fields Method

et al. 2010

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Abstract The present paper deals with full-field strain measurement on glass/epoxy composite tensile specimens submitted to high strain rate loading through a split Hopkinson pressure bar (SHPB) device and with the identification of their mechanical properties. First, the adopted methodology is presented: the device, including an Ultra-High Speed camera, and the experimental procedure to obtain relevant displacement maps are described. The different full-field results including displacement, strain and acceleration maps for two mechanical tests are then addressed. The last part of the paper deals with an original procedure to identify stiffnesses on this dynamic case only using the actual strain and acceleration maps (without the applied force) by using the Virtual Fields Method.

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Section: Methodsmentioning

confidence: 99%

Section: Dynamic Behaviour Of Laminated Compositesmentioning

confidence: 99%

Full-Field Strain Measurement and Identification of Composites Moduli at High Strain Rate with the Virtual Fields Method

et al. 2010

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“…The matrix is also susceptible to changes in behavior under high loading rates. To further establish material characteristics under high strain rates, in 1997 Sierakowski [12] presented a review of strain rate effects in several different types of composites tested using several different test methods. He found that the fiber orientation, composite type, mode of loading, and strain rate all affect the behavior of the material.…”

Section: Introductionmentioning

confidence: 99%

Strain Rate Effects in CFRP Used For Blast Mitigation

et al. 2014

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Abstract:The purpose of this research is to gain a better understanding of strain rate effects in carbon fiber reinforced polymer (CFRP) laminates exposed to blast loading. The use of CFRP offers an attractive option for mitigating structures exposed to blasts. However, the effect of high strain rates in CFRP composites commonly used in the civil industry is unknown. This research conducted tensile tests of 21 CFRP coupons using a hydraulically powered dynamic loader. The strain rates ranged from 0.0015 s and are representative of strain rates that CFRP may see in a blast when used to strengthen reinforced concrete structures. The results of the testing showed no increase in the tensile strength or stiffness of the CFRP at the higher strain rates. In addition, the results showed significant scatter in the tensile strengths possibly due to the rate of loading or manufacture of the coupon.

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“…Therefore, it is necessary to investigate the strain rate sensitivity, failure modes and other behaviors under dynamic loading. Several studies have been performed on strain rate sensitivity [15]- [17]. Ochola et al [18] tested a glass fiber reinforced polymer at different strain rates.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Pultruded Glass-Graphite/Epoxy Hybrid Composites Subjected to Transverse High Strain-Rate Compression Loading

Afrough¹,

Pandya²,

Daryadel³

et al. 2015

MSA

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In a previous study, the energy absorption and dynamic response of different combinations of cylindrical fiber-reinforced pultruded hybrid composite samples made of unidirectional glass and graphite fiber/epoxy, were investigated under longitudinal compression loading. It was found that placing glass fibers in the inner core of composites resulted in a higher ultimate compressive strength and specific energy absorption. In this study, the dynamic responses of pultruded glassgraphite/epoxy hybrid specimens with rectangular cross-section subjected to transverse compression loading are reported. Crack initiation and propagation was monitored using a high-speed video camera, and the effects of hybridization were analyzed. It was found that the location of glass or graphite fibers inside the pultruded composites has no significant effect on the ultimate compressive strength under such transverse compression loading. The energy absorption in all the hybrid specimens was almost identical. Graphite/epoxy composite showed higher specific energy absorption due to its lower density, and glass/epoxy composite had the lowest specific energy absorption.

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Strain Rate Effects in Composites

Cited by 125 publications

References 0 publications

Full-Field Strain Measurement and Identification of Composites Moduli at High Strain Rate with the Virtual Fields Method

Full-Field Strain Measurement and Identification of Composites Moduli at High Strain Rate with the Virtual Fields Method

Strain Rate Effects in CFRP Used For Blast Mitigation

Dynamic Response of Pultruded Glass-Graphite/Epoxy Hybrid Composites Subjected to Transverse High Strain-Rate Compression Loading

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