Interlaminar shear properties of polymer matrix composites: Strain rate effect

Naik, N.K.; Asmelash, Addis; Kavala, Venkateswara Rao; Veerraju, Ch.

doi:10.1016/j.mechmat.2007.05.003

Cited by 67 publications

(29 citation statements)

References 15 publications

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“…In the proposed elastic-viscoplastic extension A is used in the formulation of the viscoplastic creep function and the viscoplastic potential, which are analogous to the plastic yield function and the plastic potential, respectively. However, the model should also take into account the strain rate dependence of the elastic and strength properties observed in carbon-epoxy composites [2,[12][13][14][15][16][17][18]. The elastic free energy density for the proposed transversely isotropic model reads:…”

Section: Constitutive Modelmentioning

confidence: 99%

Experimental characterization and constitutive modeling of the non-linear stress–strain behavior of unidirectional carbon–epoxy under high strain rate loading

Koêrber

Kühn

Ploeckl

et al. 2018

Adv. Model. and Simul. in Eng. Sci.

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The mechanical response of IM7-8552 carbon epoxy was investigated for transverse tension and transverse tension/in-plane shear loadings at static and dynamic strain rates using transverse tension and off-axis tension specimens. The dynamic tests were carried out on a split-Hopkinson tension bar at axial strain rates from 113 to 300 s −1 . With the already available off-axis and transverse compression test data for IM7-8552, a comprehensive data set is available now, which can be used for validation and calibration of numerical models. The measured axial stress-strain response was simulated using a fully 3D transversely isotropic elastic-viscoplastic constitutive model. The constitutive model represents a viscoplastic extension of the transversely-isotropic plasticity model developed by the authors (Vogler et al. in Mech Mater 59:50-64, 2013). An invariant based failure criterion is added to the model to be able to predict the strength for a given orientation and strain rate accurately. The strain rate dependency of the elastic and ultimate strength properties is introduced in the model through scaling functions. A good correlation between the measured and numerically predicted stress-strain response and failure of the specimens was achieved for all specimen types and both strain rate regimes.

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Section: Constitutive Modelmentioning

confidence: 99%

Experimental characterization and constitutive modeling of the non-linear stress–strain behavior of unidirectional carbon–epoxy under high strain rate loading

Koêrber

Kühn

Ploeckl

et al. 2018

Adv. Model. and Simul. in Eng. Sci.

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show abstract

“…On the experime ntal data given in the present study, the values of C 1 , C 2 and C 4 were determine d, sequentially , 0.024, 0.059 and 0.048 for the tested E-glass/poly ester composite . The value of C 3 was calculate d 0.024 from the experime ntal data given in [22]. During a typical SHPB test, strain rate varies with time, thus an averag e strain rate was calculate d for each test performed .…”

Section: Modelingmentioning

confidence: 99%

Modeling quasi-static and high strain rate deformation and failure behavior of a (±45) symmetric E-glass/polyester composite under compressive loading

2013

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a b s t r a c tQuasi-static (1 Â 10 À3-1 Â 10 À2 s À1) and high strain rate ($1000 s À1) compressive mechanical response and fracture/failure of a (±45) symmetric E-glass/polyester composite along three perpen dicular directions were determined experimentally and numerically. A numerical model in LS-DYNA 971 usi ng material model MAT_162 was developed to investigate the compression deformation and fracture of the comp osite at quasi-static and high strain rates. The compressive stress-strain behaviors of the composite along three directions were found strain rate sensitive. The modulus and maximum stress of the composite increased with increasing strain rate, while the strain rate sensitivity in in-plane direction was higher than that in through-thickness direction. The damage progression determined by high speed camera in the specimens well agreed with that of numerical model. The numerical model successfully predicted the damage initiation and progression as well as the failure modes of the composite.

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“…Polymers are playing a crucial role in modern material technology; they can be applied in a wide variety of applications from the electronics industry, chemical, power generation, and automotive up to aerospace industries [1][2][3]. There have been great efforts to improve the physical, chemical and mechanical properties of polymers by inclusion of different fillers.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Particles Size on the Thermal Conductivity of Polymer Nanocomposite

Tessema

Kidane

2014

Composite, Hybrid, and Multifunctional Materials, Volume 4

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The variation in thermal conductivity of polymer nanocomposite with different particle sizes and volume fractions have been investigated. Particle reinforced nano-composites with two different particle sizes and the volume ratio of each size ranging from 0 to 50 % is considered. The test is conducted using a unidirectional/linear heat transfer device that has six thermocouples to monitor the temperature flow through and across the cross section of the specimen. In addition, based on Lewis-Nielson and modified effective medium approximation, a three phase analytical model is proposed to determine the thermal conductivity of different nanocomposites. It is observed that the thermal conductivity linearly increases as the volume fraction of the particles increases. On the other hand, though the particle size has an effect on the thermal conductivity of the nanocomposites, the effect is minimal compared with the volume fraction. The analytical model has been applied to different batches of specimens, and the results from the experiment and analytical model are compared.Keywords Nanocomposite • Thermal conductivity • Kapitaz resistance • Interface layer • Surface functionalizing IntroductionPolymers are playing a crucial role in modern material technology; they can be applied in a wide variety of applications from the electronics industry, chemical, power generation, and automotive up to aerospace industries [1-3]. There have been great efforts to improve the physical, chemical and mechanical properties of polymers by inclusion of different fillers. Carbon nanotubes, Graphenes, Glass fibers, Ceramic nanoparticles and Aluminum nanoparticles are some of the fillers used as reinforcement in nano-composites [4]. Even though nanoparticle reinforced polymer composites have proven to have many advantages, their analysis is more complicated relative to the plain polymer due to the non-uniform distribution of reinforcement and variation in properties from matrix to filler.The thermal conductivity of nano-composites plays a vital role in the overall system performance, especially in the electronic, chemical and power generation industries where these materials are used either as a thermal conductor or insulator [3]. Studies have indicated that effective thermal conductivity of nanocomposites is influenced by the thermal property of the constituents, K matrix and K filler , thickness of the interface layer (t i ), uniformity of filler distribution, filler geometry/aspect ratio and filler volume fraction [1,[4][5][6][7][8]. Out of the listed parameters, the thickness of the interface layer (t i ) is difficult to manage. To date, there have been great efforts in surface modifications techniques that are hoped to reduce or eliminate the interface layer thickness.On the other hand, functionalizing the surface of nano fillers has improved the dispersion of fillers and the interface layer between the filler and the matrix. The main focus of this paper is to investigate the effect of particle size and functionalization on the t...

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Interlaminar shear properties of polymer matrix composites: Strain rate effect

Cited by 67 publications

References 15 publications

Experimental characterization and constitutive modeling of the non-linear stress–strain behavior of unidirectional carbon–epoxy under high strain rate loading

Experimental characterization and constitutive modeling of the non-linear stress–strain behavior of unidirectional carbon–epoxy under high strain rate loading

Modeling quasi-static and high strain rate deformation and failure behavior of a (±45) symmetric E-glass/polyester composite under compressive loading

The Effect of Particles Size on the Thermal Conductivity of Polymer Nanocomposite

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