Measuring the tensile and bending properties of nanohoneycomb structures

Jeon, Ji Hoon; Choi, Dukhyun; Lee, P. S.; Lee, K. H.; Park, H. C.; Hwang, Woonbong

doi:10.1007/s11029-006-0028-1

Cited by 9 publications

(10 citation statements)

References 13 publications

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“…The results reflected that the bending modulus of the AAO films, with the porosity less than 25%, had almost no difference between both test types. The results greatly resembled the research proposed by Gall et al [ 23 ] and Jeon et al [ 24 ]. Jeon and his coworkers described that there was no significant difference in the bending modulus between two three-point bending configurations of a nano-universal testing machine.…”

Section: Resultssupporting

confidence: 90%

“…Regarding bending properties of AAO films, an atomic force microscope (AFM) or a nano-universal testing machine (UTM) were usually used in the bending test. In Jeon’s study [ 24 ], bending tests were carried out on cantilever beams by pressing AFM tips, and the results were compared with three-point bending tests conducted by using the nano-UTM. They found that Young’s modulus was the same, approximately 30 to 40 GPa, in both measurements and the existence of clogged and open layers did not affect the stress distribution in the porous layer or its modulus.…”

Section: Introductionmentioning

confidence: 99%

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Flexural Properties and Fracture Behavior of Nanoporous Alumina film by Three-Point Bending Test

Chen

Luo²

2017

Micromachines

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This study investigated the influence of porosity on the flexural property of a nanoporous alumina film. When the porosity of the alumina film increased, both bending strength and modulus declined. The results from the bending test revealed that the setting of the film during the bending test had significant influence on the flexural property. Fracture only occurred when the porous side of the alumina film suffered tensile stress. The ability to resist fracture in the barrier layer was higher than in the porous side; the magnitude of the bending strength was amplified when the barrier layer sustained tensile stress. When the porous layer suffered a tensile stress, the bending strength decreased from 182.4 MPa to 47.7 Mpa as the porosity increased from 22.7% to 51.7%; meanwhile, the modulus reduced from 82.7 GPa to 17.9 GPa. In this study, the most important finding from fractographic analysis suggested that there were a localized plastic deformations and layered ruptures at the porous side of the alumina film when a load was applied. The fracture behavior of the nanoporous alumina film observed in the present work was notably different from general ceramic materials and might be related to its asymmetric nanostructure.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Flexural Properties and Fracture Behavior of Nanoporous Alumina film by Three-Point Bending Test

Chen

Luo²

2017

Micromachines

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“…The fabrication process of nanohoneycomb structures is shown in [20]. The nanohoneycomb structure consists of open, porous, and clogged layers, as shown in Figure 1.…”

Section: Nanohoneycomb Structuresmentioning

confidence: 99%

“…The existence of the clogged and the open layer did not affect the stress distribution in the porous layer, or the modulus. Hence, it can be supposed that only the porous layer undergoes tensile and bending loading, simplifying the stress analysis [20].…”

Section: Nanohoneycomb Structuresmentioning

confidence: 99%

Measurement of Elastic Constants of Nanohoneycomb Structures

Jeon

Hwang

Lee

2009

Journal of Composite Materials

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Five engineering constants of transversely isotropic nanohoneycomb material are obtained, using one tensile test, two bending tests, and two indentation tests. The advantage is that all these tests can be carried out using only simple beam shape specimens. In all but the tensile test, a desired material constant is to be extracted from mixed materials constants. A disadvantage is that the deviation of the desired material constants are increased by the deviation of other related material constants. This is the first attempt to measure mechanical properties of microscopic specimens of brittle transversely isotropic material. It is intended to lay the foundation for easy and simple measurement of complex material constants of microscopic specimens.

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“…In most of the bending experiments, it is assumed that the tensile and the compressive moduli of the materials are the same. However in anisotropic materials differences between these two moduli may be observed [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Determination of Tensile and Compressive Moduli of Polymer Composites Using Three Points Cantilever

Rahmatpanah¹,

Ghane²,

Rahmatpanah³

2019

AJMIE

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In this work a technique is proposed to use bending test in order to determine the tensile and the compressive moduli of plastic sheets as well as polymer composites. A two-component free ends beam deflected in a three point cantilever is used to determine tensile and compressive moduli. Using small deflection equations and the theory of two-component beam, tensile and compressive moduli are then determined via computer program. The beam is composed of two components; spring steel and polymeric strip of the same width. These two components are bonded together with special glue. Two different types of material sheets were tested. The results show that both materials have different tensile and compressive modulus. To verify the model, uniaxial tensile tests were also performed. Taking the values of uniaxial tensile tests as reference showed acceptable accuracy at the proposed method.

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Measuring the tensile and bending properties of nanohoneycomb structures

Cited by 9 publications

References 13 publications

Flexural Properties and Fracture Behavior of Nanoporous Alumina film by Three-Point Bending Test

Flexural Properties and Fracture Behavior of Nanoporous Alumina film by Three-Point Bending Test

Measurement of Elastic Constants of Nanohoneycomb Structures

Determination of Tensile and Compressive Moduli of Polymer Composites Using Three Points Cantilever

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