Investigation of strain rate effects on in-plane shear properties of glass/epoxy composites

Shokrieh, M.M.; Omidi, Majid Jamal

doi:10.1016/j.compstruct.2009.04.035

Cited by 67 publications

(37 citation statements)

References 24 publications

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“…Therefore, the quasi-static Young's modulus and Poisson's ratio will be used as the reference values in this paper. However, for a unidirectional layup, the strain rate dependence of the material properties proved quite significant, especially on the transverse and shear moduli [24,25]. The extension of the present work to unidirectional specimens is currently underway and will be reported in the near future.…”

Section: Tests and Materialsmentioning

confidence: 95%

Exploration of Saint-Venant’s Principle in Inertial High Strain Rate Testing of Materials

Zhu

Pierron

2015

Exp Mech

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Current high strain rate testing procedures of materials are limited by poor instrumentation which leads to the requirement for stringent assumptions to enable data processing and constitutive model identification. This is the case for instance for the well known Split Hopkinson Pressure Bar (SHPB) apparatus which relies on strain gauge measurements away from the deforming sample. This paper is a step forward in the exploration of novel tests based on time and space resolved kinematic measurements obtained through ultra-high speed imaging. The underpinning idea is to use acceleration fields obtained from temporal differentiation of the full-field deformation maps measured through techniques like Digital Image Correlation (DIC) or the grid method. This information is then used for inverse identification with the Virtual fields Method. The feasibility of this new methodology has been verified in the recent past on a few examples. The present paper is a new contribution towards the advancement of this idea. Here, inertial impact tests are considered. They consist of firing a small steel ball impactor at rectangular free standing quasi-isotropic composite specimens. One of the main contributions of the work is to investigate the issue of through-thickness heterogeneity of the kinematic fields through both numerical simulations (3D finite element model) and actual tests. The results show that the parasitic effects arising from non-uniform through-the-thickness loading can successfully be mitigated by the use of longer specimens, making use of Saint-Venant's principle in dynamics.

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Section: Tests and Materialsmentioning

confidence: 95%

Exploration of Saint-Venant’s Principle in Inertial High Strain Rate Testing of Materials

Zhu

Pierron

2015

Exp Mech

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“…Considering transverse properties of composites, they have found that the elastic modulus and strength increased by increasing the strain rate [3]. In-plane shear tests under different strain rates show that although shear strength of composites increased by increasing the strain rate, but the shear modulus decreased slightly [4]. Rotem and Lifshitz [6] investigated the tensile behavior of UD glass fiber/epoxy composites over a wide range of strain rates from 10 ି to 30 ‫ݏ‬ ିଵ and found that the dynamic modulus is 50% higher than the static modulus.…”

Section: Introductionmentioning

confidence: 95%

“…Shokrieh and Omidi [2][3][4][5] investigated mechanical properties of UD glass/epoxy composites under different strain rates up to 100 ‫ݏ‬ ିଵ and compared them with results obtained by static loading. They have shown that the tensile strength increased significantly by increasing the strain rate while the tensile modulus increased slightly [2].…”

Section: Introductionmentioning

confidence: 98%

“…Polymeric matrices have rate dependent mechanical behavior, so the shear modulus of polymeric composites is sensitive to the loading rate [4]. Daniel et al [14] attempted to characterize the effect of strain rate up to 500 ‫ݏ‬ ିଵ on inplane shear properties of carbon/epoxy composites using the 10° off-axis rings under internal pressure.…”

Section: Introductionmentioning

confidence: 99%

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A strain-rate dependent micromechanical constitutive model for glass/epoxy composites

Shokrieh

Mosalmani

Omidi

2015

Composite Structures

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“…An increase in strain rate increases the strength as documented by various authors [18][19][20][21][22][23][24][25][26]. A method to include strain rate sensitivity in failure criteria is proposed in [27].…”

mentioning

confidence: 95%

A Material Model for FE-Simulation of UD Composites

Fischer

2015

Appl Compos Mater

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Composite materials are being increasingly used for industrial applications. CFRP is particularly suitable for lightweight construction due to its high specific stiffness and strength properties. Simulation methods are needed during the development process in order to reduce the effort for prototypes and testing. This is particularly important for CFRP, as the material is costly. For accurate simulations, a realistic material model is needed. In this paper, a material model for the simulation of UD-composites including non-linear material behaviour and damage is developed and implemented in Abaqus. The material model is validated by comparison with test results on a range of test specimens.

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Investigation of strain rate effects on in-plane shear properties of glass/epoxy composites

Cited by 67 publications

References 24 publications

Exploration of Saint-Venant’s Principle in Inertial High Strain Rate Testing of Materials

Exploration of Saint-Venant’s Principle in Inertial High Strain Rate Testing of Materials

A strain-rate dependent micromechanical constitutive model for glass/epoxy composites

A Material Model for FE-Simulation of UD Composites

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