Experimental investigation and modeling of the rate-dependent deformation behavior of PMMA at different temperatures

Hu, Wen-Jun; Guo, Hui; Chen, Yongmei; Ruoze, Xie; Jing, Hua; He, Peng

doi:10.1016/j.eurpolymj.2016.10.036

Cited by 35 publications

(9 citation statements)

References 28 publications

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“…16 Thus, to reach a uniform state of stress and a nearly constant strain rate during the loading process, the traditional SHPB apparatus was modified by shaping the incident pulse using a copper cushion. 18 Through trial and error, the optimum geometry dimension of pulse shaper was chosen as 0.5 mm in thickness and 5–7 mm in diameter for different strain rates. Based on elastic stress wave theory, the stresses on both sides of the specimen were calculated as…”

Section: Methodsmentioning

confidence: 99%

Experimental investigation and modeling of dynamic thermomechanical behavior of 4-harness satin weave carbon/epoxy composites

Guo

et al. 2017

Journal of Thermoplastic Composite Materials

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Theoretical and experimental studies on the compressive mechanical behavior of 4-harness satin weave carbon/epoxy composite laminates under in-plane loading are conducted over the temperature range of 298–473 K and the strain rate range of 0.001–1700/s in this article. The stress–strain curves of 4-harness satin weave composites are obtained at different strain rates and temperatures, and key mechanical properties of the material are determined. The deformation mechanism and failure morphology of the samples are observed and analyzed by scanning electron microscope (SEM) micrographs. The results show that the uniaxial compressive mechanical properties of 4-harness satin weave composites are strongly dependent on the temperature but are weakly sensitive to strain rate. The peak stress and elastic modulus of the material have the trend of decrease with the increasing of temperature, and the decreasing trend can be expressed as the functional relationship of temperature shift factor. In addition, SEM observations show that the quasi-static failure mode of 4-harness satin weave composites is shear failure along the diagonal lines of the specimens, while the dynamic failure modes of the material are multiple delaminations and longitudinal splitting, and with the increasing of temperature, its longitudinal splitting is more serious, but the delamination is relatively reduced. A constitutive model with thermomechanical coupling effects is proposed based on the experimental results and the increment theory of elastic–plastic mechanics. The experimental verification and numerical analysis show that the model is shown to be able to predict the finite deformation behavior of 4-harness satin weave composites over a wide range of temperatures.

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Section: Methodsmentioning

confidence: 99%

Experimental investigation and modeling of dynamic thermomechanical behavior of 4-harness satin weave carbon/epoxy composites

Guo

et al. 2017

Journal of Thermoplastic Composite Materials

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“…Here, a visco-hyperelastic constitutive model with thermomechanical coupling effect is introduced to quantitatively describe the mechanical properties of directional polymethylmethacrylate under different loading conditions. The study of Hu et al [22,23] shows that the general constitutive relation of polymer materials under finite deformation can be decoupled into the following two parts:σ=−pI+normalΨ(E(t))+δnormalΨ(E(t)|δ(E(t−s)−E(t)))=−pI+Se+Sv where p is the hydrostatic pressure that controls the volume deformation of the materials, E ( t ) and I are the strain history and unit tensors, and S e and S v are the hyperelastic and viscoelastic deviatoric stress tensors, respectively.…”

Section: Constitutive Modelmentioning

confidence: 99%

Thermal–Mechanical Coupling Behavior of Directional Polymethylmethacrylate under Tension and Compression

Guo

Chen

et al. 2018

Polymers

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In this work, the quasi-static and dynamic mechanical behavior of directional polymethylmethacrylate is investigated under conditions of uniaxial compression and tension. The main purpose of this investigation is to discuss the effect of strain rate and temperature on the deformation characteristics and failure of such material. Research was carried out with the use of an electric universal testing machine and split Hopkinson bars, which were equipped with high- and low-temperature control systems. The experimental methods for studying the tensile and compressive response of polymer materials under different testing conditions were validated by one-dimensional stress wave theory and digital-image correlation technique. The finite deformation stress–strain behaviors of the samples under different loading condition were obtained with a constant temperature ranging from 218 to 373 K. The experimental results showed that the uniaxial tensile and compressive behaviors of directional polymethylmethacrylate under finite deformation are strongly dependent on temperature, decreased tensile and compressive stress of the material under different strain levels, and increased temperature. Meanwhile, the dynamic tensile and compressive stresses of the material are much higher than the quasi-static stresses, showing the strain-rate strengthening effect. Moreover, the tensile and compressive mechanical behavior of directional polymethylmethacrylate has significant asymmetry. Finally, a visco-hyperelastic model is established to predict the rate-dependence mechanical behavior of directional polymethylmethacrylate at different temperatures.

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“…It is made of acrylic and have high transparency [2]. By having property similar to glass, it has proven to be a good alternative to be used in diverse industries of national production such as aircraft windshield and porthole, radar screen, optical lenses of telescope, protecting cover of instrument, and also in automotive as well as armor related applications [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…An approach of blending small rubber particles in PMMA has been shown to improve the fracture and impact toughness of PMMA. This mixture is called as rubber toughened PMMA (RT-PMMA) [3]. A rubbery phase was introduced in order to increase energy dissipation in PMMA.…”

Section: Introductionmentioning

confidence: 99%

Fracture Behavior of RT-PMMA Under Impact Loading

Jali¹,

Longère²

2020

IJIE

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Fracture mechanism of polymer under high strain rate loading is still today a complicated issue in developing their design as protection structure. In this paper, we aim to investigate the crack arrest capability of RT-PMMA when subjected to impact loading. For that purpose, Kalthoff and Winkler (KW)-like impact tests are performed using the STIMPACT platform gas launchers. Double notched specimens were impacted on the edge within a range of impact velocities (50-140 m/s). During the investigation, the failure mechanism is recorded by a high speed camera. The stress whitening phenomena is explained and it is shown that addition of rubber to PMMA matrix aids to enhance its impact toughness. This involves energy dissipation by the rubber and higher energy required for crack propagation in rubber toughened RT-PMMA as compared in neat PMMA. High impact velocities promote greater effect proved by large number of fragments produced aftermath. By carrying out uniaxial tensile tests, it was established that the mechanical behaviour of RT-PMMA strongly depends on strain rate and temperature.

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Experimental investigation and modeling of the rate-dependent deformation behavior of PMMA at different temperatures

Cited by 35 publications

References 28 publications

Experimental investigation and modeling of dynamic thermomechanical behavior of 4-harness satin weave carbon/epoxy composites

Experimental investigation and modeling of dynamic thermomechanical behavior of 4-harness satin weave carbon/epoxy composites

Thermal–Mechanical Coupling Behavior of Directional Polymethylmethacrylate under Tension and Compression

Fracture Behavior of RT-PMMA Under Impact Loading

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