Research on mechanical properties of a polymer membrane with a void based on the finite deformation theory

Sang, Jianbing; Xing, Sufang; Tian, Hongyan; Wang, Jing‐Yuan; Zhou, Jing

doi:10.1515/epoly-2015-0086

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…[19][20][21] Mechanical properties of the materials are strongly affected by structural defects such as superficial and internal cracks, holes, voids and others factors that can act as stress concentrators, initiating and favoring the mechanical failure in tensile and impact tests. 22 Paulraj et al ( 2021) have presented an important comparison between mechanical properties of different polymer matrix with respective polymer composites reinforced with several natural fibers. It was verified that tensile strength of the unfilled polymer matrixes has been strongly affected by presence of the natural fibers in polymer composites, decreasing mostly their value.…”

Section: Introductionmentioning

confidence: 99%

Accelerated aging of polymer composite from Pennisetum purpureum fibers with recycled low-density polyethylene

Grillo

Saron

2023

Journal of Composite Materials

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The use of natural fibers (NF) as reinforcement in polymer composites have been an interesting option to improve their mechanical properties and to decrease production costs since several crops can produce large amounts of NF with low cost. This is particularly attractive for polymer waste recycling that depends of the production of cheap materials to be economically viable. Elephant grass ( Pennisetum purpureum schum) is a tropical climate plant of fast growth with high potential for production of NF. However, studies on the use of P. purpureum fibers as reinforcement in polymers, mainly for recycled polymers, have been restricted. The aims of this study was to evaluate the action of the P. purpureum fibers on the properties of composites using matrix of low-density polyethylene waste (LDPE-w) as well as to verify the behavior of recycled polymer when submitted to the accelerated photochemical aging using UVA radiation. LDPE-w and LDPE-w composite with P. purpureum fibers (LDPE-composite) were analyzed at different aging times by tensile and impact tests, melt flow rate, scanning electron microscopy and Fourier transform infrared. It was verified that P. purpureum fibers induce defects in matrix of LDPE-w, decreasing the performance of mechanical properties. Similar effect also occurs when LDPE-w is submitted to the first hours of accelerated aging. On the other hand, effects of stabilization of the degradation on the polymer matrix can be attributed to the P. purpureum fibers at high aging times. Thus, P. purpureum presents high potential for use as reinforcement in recycled thermoplastic waste.

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Section: Introductionmentioning

confidence: 99%

Accelerated aging of polymer composite from Pennisetum purpureum fibers with recycled low-density polyethylene

Grillo

Saron

2023

Journal of Composite Materials

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“…Haughton (1991) solved a similar plane-stress problem for the Varga (1966) material, revealing that for this material the membrane thickness remains uniform. Various numerical analyses of similar problems and the related cavitation problems were conducted with different hyperelastic materials (e.g., Cohen and Durban, 2010;Haughton, 1990;Sang et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

A holed membrane at finite equibiaxial stretch

Friedberg,

deBotton

2021

Preprint

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The deformation and stress distribution in a stretched thin neo-Hookean circular membrane with a hole at its center are analyzed within the framework of finite deformation elasticity. Initially, we derive a simple form for the differential governing equation to the problem. This enables us to introduce a closed-form solution in the limit of infinite stretch. Subsequently, we propose approximate solutions for intermediate and large deformations. These approximations approach the exact solutions in the limits of small and infinite stretches. The transition stretch at which the membrane behavior switches from the intermediate to the large deformation approximation is determined too. Comparison of our solution and approximations to corresponding numerical results reveal a neat agreement for any stretch and ratio between the hole to the membrane radii.In the limit of large stretches and a small hole, the ratio of the hoop stress at the hole boundary to the nominal stress is 4, which is twice the corresponding ratio in the small deformation limit. Comparison of the strain energy stored in the membrane to the one in a membrane without a hole reveals that only at finite stretches the difference between these energies becomes meaningful. This implies that it is likely that a flaw in a membrane will tear out only at a finite level of stretches.

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Research on mechanical properties of a polymer membrane with a void based on the finite deformation theory

Cited by 2 publications

References 21 publications

Accelerated aging of polymer composite from Pennisetum purpureum fibers with recycled low-density polyethylene

Accelerated aging of polymer composite from Pennisetum purpureum fibers with recycled low-density polyethylene

A holed membrane at finite equibiaxial stretch

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