Dynamic compressive response of a developed polymer composite at different strain rates

Fan, Jihui; Wang, Cheng

doi:10.1016/j.compositesb.2018.06.025

Cited by 35 publications

(15 citation statements)

References 28 publications

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“…The results showed that the maximum true stress of the hemp fiber/vinyl ester composite tested under strain rate of 1376/s, 1511/s, and 2258/s were 221 MPa, 232 MPa, and 239 MPa, respectively. Some similar experimental research about dynamic compressive behaviors of polymer composites could be found in [40][41][42]. To the best of our knowledge, there was no experimental research on that compressive properties of benzoxazine matrix and its composite under high-speed impact loadings.…”

Section: Compressive Behaviors Of the Neat Benzoxazine And Abpsupporting

confidence: 54%

Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings

et al. 2020

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As a type of environmentally-friendly and low-cost natural material, bamboo fibers exhibit excellent mechanical properties. In this study, a bamboo fiber reinforced polybenzoxazine composite was fabricated by an improved hot-pressing process. The dynamic compressive behaviors of neat benzoxazine and its composite were comparatively studied by an SHPB (split Hopkinson pressure bar) apparatus. SHPB tests showed that the benzoxazine matrix and its composite exhibited significantly positive strain rate sensitivity at nominal strain rates in the range of 0.006–2500/s. During the impact loadings, the progressive deformation and failure of neat benzoxazine and bamboo composite were investigated by capturing real-time images with a high-speed camera. In comparison with neat benzoxazine, the bamboo composite had slightly higher maximum compressive stress under the same strain rates. It is noteworthy that the crashworthiness of the composite was remarkably better than that of neat benzoxazine due to the incorporation of bamboo fibers. For example, the energy absorption of bamboo composite was 105.7% higher than that of neat benzoxazine at a strain rate of 2500/s. The dynamic compressive properties of benzoxazine resin were much better than most of the conventional thermosetting resins. These results could guide the future application of this kind of composites.

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Section: Compressive Behaviors Of the Neat Benzoxazine And Abpsupporting

confidence: 54%

Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings

et al. 2020

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“…This is probably due to the reduction in the fracture toughness of epoxy matrix at a higher strain rate [35]. The different failure mechanisms of composite materials under various strain rates are also observed in other relevant studies [58][59][60][61].…”

Section: Strain Rate Effectsupporting

confidence: 63%

A physically-based constitutive model for the shear-dominated response and strain rate effect of carbon fibre reinforced composites

Tan

Liu

2020

Composites Part B: Engineering

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A significant hardening response is often observed for the shear-dominated deformation of Carbon Fibre Reinforced Plastics (CFRP). This non-linear response is typically modelled by fitting a strain hardening law against experimental stress-strain curves. Inspired by crystal plasticity framework, we develop a micro-mechanically motivated constitutive model to capture the matrix shearing and fibre rotation of CFRP under finite strain deformation and different strain rates. Strain rate dependency of the shear modulus and yield strength of the matrix was modelled through scaling functions. This physically-based constitutive model is first verified by simple shear and transverse compression tests, followed by comprehensive validations against the measured stress-strain responses of unidirectional (UD) and cross-ply composite laminates subjected to quasi-static and dynamic off-axis loading. The finite element predictions and analytical models of CFRP lamina under simple shear loading confirms that the initial yielding is governed by the shear yield strength of matrix, while the hardening behaviour is dependent on the modulus and rotation of carbon fibres. This model accurately predicts the non-linear behaviour of CFRP under off-axis loading at different strain rates, without the need of a curvefitted strain hardening law.

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“…Fiber-reinforced polymer (FRP) composites are increasingly used in impact-resistant devices, automotives, biomedical applications and aircraft structures due to their high strength-to-weight ratios and their potential for impact energy absorption [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. FRP composites are often treated as softening materials, i.e., materials that show a reduction of the load-carrying capacity accompanied by increasing (localized) deformations after reaching the maximum load-carrying capacity [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Review of Strain Rate Effects of Fiber-Reinforced Polymer Composites

Liu

Liu³

et al. 2021

Polymers

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The application of fiber-reinforced polymer (FRP) composites is gaining increasing popularity in impact-resistant devices, automotives, biomedical devices and aircraft structures due to their high strength-to-weight ratios and their potential for impact energy absorption. Impact-induced high loading rates can result in significant changes of mechanical properties (e.g., elastic modulus and strength) before strain softening occurs and failure characteristics inside the strain localization zone (e.g., failure mechanisms and fracture energy) for fiber-reinforced polymer composites. In general, these phenomena are called the strain rate effects. The underlying mechanisms of the observed rate-dependent deformation and failure of composites take place among multiple length and time scales. The contributing mechanisms can be roughly classified as: the viscosity of composite constituents (polymer, fiber and interfaces), the rate-dependency of the fracture mechanisms, the inertia effects, the thermomechanical dissipation and the characteristic fracture time. Numerical models, including the viscosity type of constitutive models, rate-dependent cohesive zone models, enriched equation of motion and thermomechanical numerical models, are useful for a better understanding of these contributing factors of strain rate effects of FRP composites.

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Dynamic compressive response of a developed polymer composite at different strain rates

Cited by 35 publications

References 28 publications

Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings

Progressive Failure and Energy Absorption of Chopped Bamboo Fiber Reinforced Polybenzoxazine Composite under Impact Loadings

A physically-based constitutive model for the shear-dominated response and strain rate effect of carbon fibre reinforced composites

Review of Strain Rate Effects of Fiber-Reinforced Polymer Composites

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