Tension and compression tests of two polymers under quasi-static and dynamic loading

Chen, W.; Lu, Fangyun; Cheng, Ming Huei

doi:10.1016/s0142-9418(01)00055-1

Cited by 281 publications

(150 citation statements)

References 22 publications

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“…Two pairs of strain gages (Kyowa: KFG-2-120-C1-5) were attached directly to the specimen parallel section to accurately measure the strain in the specimen. A pulse shaping technique [30] is applied to generate well-defined tensile strain pulses without higher frequency components in the input bar. Namely, a 0.8 mm-thick 1050 Al ring of a 16 mm inside diameter and a 21 mm outside diameter is attached onto the impact (right) side of the loading block with a thin layer of petroleum jelly.…”

Section: Low and Intermediate Strain-rate Tension Testingmentioning

confidence: 99%

Dynamic tensile stress–strain characteristics of carbon/epoxy laminated composites in through-thickness direction

Nakai

Yokoyama

2015

EPJ Web of Conferences

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Abstract. The effect of strain rate up to approximatelyε = 10 2 /s on the tensile stress-strain properties of unidirectional and cross-ply carbon/epoxy laminated composites in the through-thickness direction is investigated. Waisted cylindrical specimens machined out of the laminated composites in the through-thickness direction are used in both static and dynamic tests. The dynamic tensile stress-strain curves up to fracture are determined using the split Hopkinson bar (SHB). The low and intermediate strain-rate tensile stress-strain relations up to fracture are measured on an Instron 5500R testing machine. It is demonstrated that the ultimate tensile strength and absorbed energy up to fracture increase significantly, while the fracture strain decreases slightly with increasing strain rate. Macro-and micro-scopic examinations reveal a marked difference in the fracture surfaces between the static and dynamic tension specimens.

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Section: Low and Intermediate Strain-rate Tension Testingmentioning

confidence: 99%

Dynamic tensile stress–strain characteristics of carbon/epoxy laminated composites in through-thickness direction

Nakai

Yokoyama

2015

EPJ Web of Conferences

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“…By considering proper constitutive model for each constituent of composite materials, a computational micro-mechanics approach can be achieved to link up the FRPs behavior to not only constituent behaviors but also to the constituent arrangements as well as the constituent interactions (Canal et al, 2009;Melro et al, 2013, e.g.). In general, the mechanical behavior of amorphous glassy polymers depends on the strain rate, hydrostatic pressure and temperature, as demonstrated through numerous experimental tests (Boyce et al, 1994;Lesser and Kody, 1997;Buckley et al, 2001;Fiedler et al, 2001;Chen et al, 2002;Hine et al, 2005;Mulliken and Boyce, 2006;. A typical stress-strain behavior for this kind of materials under uniaxial monotonic loading conditions is sketched out in Fig.…”

Section: Introductionmentioning

confidence: 97%

A large strain hyperelastic viscoelastic-viscoplastic-damage constitutive model based on a multi-mechanism non-local damage continuum for amorphous glassy polymers

Nguyễn

Lani

Pardoen

et al. 2016

International Journal of Solids and Structures

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A large strain hyperelastic phenomenological constitutive model is proposed to model the highly nonlinear, rate-dependent mechanical behavior of amorphous glassy polymers under isothermal conditions. A corotational formulation is used through the total Lagrange formalism. At small strains, the viscoelastic behavior is captured using the generalized Maxwell model. At large strains beyond a viscoelastic limit characterized by a pressure-sensitive yield function, which is extended from the Drucker-Prager one, a viscoplastic region follows. The viscoplastic flow is governed by a non-associated Perzyna-type flow rule incorporating this pressure-sensitive yield function and a quadratic flow potential in order to capture the volumetric deformation during the plastic process. The stress reduction phenomena arising from the post-peak plateau and during the failure stage are considered in the context of a continuum damage mechanics approach.The post-peak softening is modeled by an internal scalar, so-called softening variable, whose evolution is governed by a saturation law. When the softening variable is saturated, the rehardening stage is naturally obtained since the isotropic and kinematic hardening phenomena are still developing. Beyond the onset of failure characterized by a pressure-sensitive failure criterion, the damage process leading to the total failure is controlled by a second internal scalar, so-called failure variable. The final failure occurs when the failure variable reaches its critical value. To avoid the loss of solution uniqueness when dealing with the continuum damage mechanics formalism, a non-local implicit gradient formulation is used for both the softening and failure variables, leading to a multi-mechanism non-local damage continuum. The pressure sensitivity considered in both the yield and failure conditions allows for the distinction under compression and tension loading conditions. It is shown through experimental comparisons that the proposed constitutive model has the ability to capture the complex behavior of amorphous glassy polymers, including their failure.

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“…More recently, research programs that study the combined effects of temperature and strain rate have made significant steps in providing better understanding of the physics behind the observed response [1,2], and also in modeling this response [3,4]. However, limited data are available in tension, and even more limited are data describing both the compressive and tensile response of the same polymer [5][6][7][8]. In studies that examine tensile response, there are, often, large gaps in the strain rate dependence.…”

Section: Introductionmentioning

confidence: 99%

“…Tension testing of brittle polymers is even more challenging due to the low strains to failure, which can result in invalid tests due to failure outside the gauge length and susceptibility to bending. For example, although experimental data exists on epoxy in compression across a range of strain rates [2,9]; very little data exists in tension [6,10]. In order to achieve valid tension tests on epoxy at high strain rates, pulse shaping techniques have been developed [6,10].…”

Section: Introductionmentioning

confidence: 99%

High strain rate tensile and compressive effects in glassy polymers

Jordan

Siviour

Woodworth

2012

EPJ Web of Conferences

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Abstract. Polymers are increasingly used in impact and complex high rate loading applications. Generally, the mechanical response of glassy polymers under high strain rates has been determined in compression. Some research programs have studied the combined effects of temperature and strain rate, still primarily in compression, providing better understanding of the physics behind the observed response and enhancing the models for these materials. However, limited data are available in tension, and even more limited are data describing both the compressive and tensile response of the same glassy polymer. This paper investigates the compressive and tensile response of glassy polymers across a range of stain rates from quasi-static to dynamic. Experimental results from dynamic mechanical analysis, quasi-static compression and tension, and split Hopkinson tension/pressure bars on several representative glassy polymers will be presented. The pressure dependant yield in these materials will be discussed through comparison of the tensile and compressive yield stresses.

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Tension and compression tests of two polymers under quasi-static and dynamic loading

Cited by 281 publications

References 22 publications

Dynamic tensile stress–strain characteristics of carbon/epoxy laminated composites in through-thickness direction

Dynamic tensile stress–strain characteristics of carbon/epoxy laminated composites in through-thickness direction

A large strain hyperelastic viscoelastic-viscoplastic-damage constitutive model based on a multi-mechanism non-local damage continuum for amorphous glassy polymers

High strain rate tensile and compressive effects in glassy polymers

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