Experimental study of the cyclic visco-elasto-plastic behaviour of a polyamide fibre strap

Blès, G.; Nowacki, Wojciech; Tourabi, A.

doi:10.1016/j.ijsolstr.2009.02.015

Cited by 33 publications

(62 citation statements)

References 30 publications

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“…In the past 5 years, a number of studies have focused on experimental and theoretical analysis of the time-dependent response of polymers and polymer composites subjected to cyclic loading: Xia et al (2005), Hizoum et al (2006), Drozdov and Christiansen (2007), Yakimets et al (2007), Sullivan (2008), Bles et al (2009), Cantournet et al (2009), Drozdov (2009, Mizuno andSanomura (2009), Spieckermann et al (2009), Zrida et al (2009), Ayoub et al (2010), Bouchart et al (2010), Buckley et al (2010), Drozdov (2010a), Ramkumar et al (2010), Silberstein and Boyce (2010) and Vandenbroucke et al (2010). Constitutive equations developed in those works were confined, however, to the description of observations along the first cycle (loading-unloading) of a cyclic deformation program.…”

Section: Introductionmentioning

confidence: 99%

Cyclic viscoelastoplasticity and low-cycle fatigue of polymer composites

Drozdov

2011

International Journal of Solids and Structures

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a b s t r a c tObservations are reported on a polymer composite (polyamide-6 reinforced with short glass fibers) in tensile relaxation tests with various strains, tensile creep tests with various stresses, and cyclic tests with a stress-controlled program (ratcheting with a fixed maximum stress and various minimum stresses). Constitutive equations are developed in cyclic viscoelastoplasticity of polymer composites. Adjustable parameters in the stress-strain relations are found by fitting observations in relaxation tests and cyclic tests (16 cycles of loading-unloading). It is demonstrated that the model correctly predicts experimental data in creep tests and dependencies of maximum and minimum strains per cycle on number of cycles up to fatigue fracture of specimens. The influence of strain rate and minimum stress on number of cycles to failure is studied numerically.

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Section: Introductionmentioning

confidence: 99%

Cyclic viscoelastoplasticity and low-cycle fatigue of polymer composites

Drozdov

2011

International Journal of Solids and Structures

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“…Because of the complex visco-elastoplastic behaviour of the polyethylene, it is not straightforward to evaluate the axial stiffness of the instantaneous elasticity. We proposed to assess this stiffness by measuring the moduli of short-time behaviour according to [2]. G. Bles [2] noted that the measurements after relaxations and creeps and those of the initial modulus were in agreement and provided a characteristic evolution of the modulus.…”

Section: Evaluation Of the Axial Stiffnessmentioning

confidence: 99%

“…We proposed to assess this stiffness by measuring the moduli of short-time behaviour according to [2]. G. Bles [2] noted that the measurements after relaxations and creeps and those of the initial modulus were in agreement and provided a characteristic evolution of the modulus. In our study, the strain rate was 2.10 −4 s −1 and the load at the beginning of the relaxation stages increased from 100 to 900 N , by 100 N .…”

Section: Evaluation Of the Axial Stiffnessmentioning

confidence: 99%

Inverse Identification of the Bending Stiffness of a Braided Polyethylene Twine Subject to Large Deformation: Application to the Identification of the Mesh Opening Rigidity of Fishing Nets

Morvan¹,

Blès²,

Dumergue³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. The evaluation of the mesh opening stiffness of fishing nets is an important issue in assessing the selectivity of trawls. It appeared that a larger bending rigidity of twines decreases the mesh opening and could reduce the escapement of fish. Nevertheless, netting structure is complex. A netting is made up of braided twines made of polyethylene or polyamide. These twines are tied with non-symmetrical knots. Thus, these assemblies develop contact-friction interactions. Moreover, the netting can be subject to large deformation. In this study, we investigate the responses of netting samples to different types of solicitations. Samples are loaded and unloaded with creep and relaxation stages, with different boundary conditions. Then, two models have been developed: an analytical model and a finite element model. The last one was used to assess, with an inverse identification algorithm, the bending stiffness of twines. In this paper, experimental results and a model for netting structures made up of braided twines are presented. During dry forming of a composite, for example, the matrix is not present or not active, and relative sliding can occur between constitutive fibres. So an accurate modelling of the mechanical behaviour of fibrous material is necessary. This study offers experimental data which could permit to improve current models of contact-friction interactions [4], to validate models for large deformation analysis of fibrous materials [1] on a new experimental case, then to improve the evaluation of the mesh opening stiffness of a fishing net.

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“…Many studies particularly concerned with polymer fibres, ropes and fabrics have also been developed in the last years (Boxman and Cloos, 1998;Smeets et al, 2001;Bles et al, 2009;Ghoreishi et al, 2007;Fernandes and Rossi, 2005;King et al, 2005, for instance). Nevertheless, the mechanisms proposed so far to explain the damage initiation and propagation processes in different geometry/ material mooring systems are not able to elucidate all aspects of the phenomenon (Pellegrin, 1999;Sloan, 1999;Hooker, 2000;Pearson, 2002;Petruska et al, 2005;Silva and Chimisso, 2005;Beltran and Williamson, 2005;Schmidt et al, 2006, for instance).…”

Section: Introductionmentioning

confidence: 99%

Modelling creep tests in HMPE fibres used in ultra-deep-sea mooring ropes

Mattos

Chimisso

2011

International Journal of Solids and Structures

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a b s t r a c tDue to its low density and high strength, HMPE (high modulus polyethylene) fibres are being increasingly used in synthetic ropes for offshore mooring. Nevertheless, the occurrence of creep at sea temperature can be a shortcoming for its practical use. Creep tests performed at different load levels in a sub-system of the HMPE rope (yarn) are frequently used as a first step to obtain some information about the susceptibility to creep deformation at a given temperature. The present paper is concerned with the phenomenological modelling of creep tests in HMPE yarns. In this macroscopic approach, besides the classical variables (stress, total strain), an additional scalar variable related with the damage induced by creep process is introduced. An evolution law is proposed for this damage variable. The predicted lifetimes and elongations of HMPE specimens in creep tests at different load levels and room temperature are compared with experimental results showing a good agreement.

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Experimental study of the cyclic visco-elasto-plastic behaviour of a polyamide fibre strap

Cited by 33 publications

References 30 publications

Cyclic viscoelastoplasticity and low-cycle fatigue of polymer composites

Cyclic viscoelastoplasticity and low-cycle fatigue of polymer composites

Inverse Identification of the Bending Stiffness of a Braided Polyethylene Twine Subject to Large Deformation: Application to the Identification of the Mesh Opening Rigidity of Fishing Nets

Modelling creep tests in HMPE fibres used in ultra-deep-sea mooring ropes

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