Strain Rate Sensitivity of Epoxy Resin in Tensile and Shear Loading

Gilat, Amos; Goldberg, Robert K.; Roberts, Gary D.

doi:10.1061/(asce)0893-1321(2007)20:2(75)

Cited by 161 publications

(94 citation statements)

References 17 publications

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“…Also note that, although epoxy shows rate-dependency of the Young's modulus in tension [9], the initial loading stiffness seems hardly influenced by the test type (i.e. LVI versus QSI).…”

Section: Comparing Force-displacement Responsementioning

confidence: 99%

Comparing damage from low-velocity impact and quasi-static indentation in automotive carbon/epoxy and glass/polyamide-6 laminates

et al. 2018

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The results of a low-velocity impact programme on both carbon/epoxy and glass/polyamide-6 composite laminates are compared to the results of quasi-static indentation. Cross-ply and quasiisotropic stacking sequences are impacted and quasi-static indentation tests are performed up to the same maximum displacement. The response of the laminates to both test methods is compared in terms of force-displacement behaviour, dissipated energy and resulting damage. Significant differences between low-velocity impact and quasi-static indentation are found for both material systems. It is therefore concluded that the test methods cannot be interchanged for material characterisation.

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“…Also note that, although epoxy shows rate-dependency of the Young's modulus in tension [9], the initial loading stiffness seems hardly influenced by the test type (i.e. LVI versus QSI).…”

Section: Comparing Force-displacement Responsementioning

confidence: 99%

Comparing damage from low-velocity impact and quasi-static indentation in automotive carbon/epoxy and glass/polyamide-6 laminates

et al. 2018

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“…There are several glassy polymers that have been extensively studied at high strain rate in the literature, including polymethylmethacrylate (PMMA) [16,95,100,[123][124][125][126][127][128][129][130][131][132], polycarbonate (PC) [15, 18-20, 100, 110, 124, 126, 127, 133-136], polyvinylchloride (PVC) [137,138] and varying classes of epoxy [23,74,[139][140][141]. The large number of studies on a ''single'' material indicates that it is critical to understand the pedigree of the polymer being tested, including processing history and storage.…”

Section: Glassy Amorphous Polymersmentioning

confidence: 99%

High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

284

121

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The mechanical properties of polymers are becoming increasingly important as they are used in structural applications, both on their own and as matrix materials for composites. It has long been known that these mechanical properties are dependent on strain rate, temperature, and pressure. In this paper, the methods for dynamic loading of polymers will be briefly reviewed. The high strain rate mechanical properties of several classes of polymers, i.e. glassy and rubbery amorphous polymers and semi-crystalline polymers will be reviewed. Additionally, time-temperature superposition for rate dependent large strain properties and pressure dependence in polymers will be discussed. Constitutive modeling and shock properties of polymers will not be discussed in this review.

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“…Most high rate testing studies on carbon-epoxy composites suggest enhancement of matrix-dominated ply properties with increased loading rate [6][7][8][9][10][11][12][13][14][15]. All of these studies pointed to an enhanced nonlinear shear response (elevated stress-strain curve) for increased loading rates.…”

mentioning

confidence: 99%

Static and high-rate loading of single and multi-bolt carbon–epoxy aircraft fuselage joints

Egan

McCarthy

et al. 2013

Composites Part A: Applied Science and Manufacturing

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Single-lap shear behaviour of carbon-epoxy composite bolted aircraft fuselage joints at quasi-static and dynamic (5 m/s and 10 m/s) loading speeds is studied experimentally. Single and multi-bolt joints with countersunk fasteners were tested. The initial joint failure mode was bearing, while final failure was either due to fastener pull-through or fastener fracture at a thread. Much less hole bearing damage, and hence energy absorption, occurred when the fastener(s) fractured at a thread, which occurred most frequently in thick joints and in quasistatic tests. Fastener failure thus requires special consideration in designing crashworthy fastened composite structures; if it can be delayed, energy absorption is greater. A correlation between energy absorption in multibolt and single-bolt joint tests indicates potential to downsize future test programmes. Tapering a thin fuselage panel layup to a thicker layup at the countersunk hole proved highly effective in achieving satisfactory joint strength and energy absorption.

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Strain Rate Sensitivity of Epoxy Resin in Tensile and Shear Loading

Cited by 161 publications

References 17 publications

Comparing damage from low-velocity impact and quasi-static indentation in automotive carbon/epoxy and glass/polyamide-6 laminates

Comparing damage from low-velocity impact and quasi-static indentation in automotive carbon/epoxy and glass/polyamide-6 laminates

High Strain Rate Mechanics of Polymers: A Review

Static and high-rate loading of single and multi-bolt carbon–epoxy aircraft fuselage joints

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