Effect of Sawdust Volume on Mechanical Properties of Composite Material

Dyachenkо, A. G.; Savostina, T. P.; Saed, B. I.

doi:10.23947/1992-5980-2018-18-3-300-305

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…There are a number of works only indirectly related to the topic under consideration. In the articles [10,11], the dependence of the surface roughness on the composition of the composite is considered, and in the work [12] -a tribological study on the verification of the composite friction.…”

Section: Introductionmentioning

confidence: 99%

Change in surface roughness of composite piles when pressing into the ground

Boyarintsev

Sukhov²,

Tumashevskaia³

2023

E3S Web Conf.

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The bearing capacity of piles on the ground is one of the main characteristics of pile foundations, which is responsible for its interaction with the ground. This characteristic depends on many factors: the granulometric composition of the soil, its moisture content, con-sistency, texture, as well as the type and properties of the pile material. One of the main charac-teristics of the pile material is its surface roughness. In many studies, the dependence of the angle of friction of the soil against the material of the pile on the value of the roughness of its surface was noted. At the same time, all studies focused exclusively on the dependence of the angle of friction on the roughness, not paying attention to the possibility of its variability in the process of driving the pile into the ground. This goal was set in the framework of this study. Using a standard single-plane cutter, the passage of a composite pile at a distance of 0.5m was simulated at a depth of 10 m. Before and after the test, the surface roughness parameters were measured using the Seitronic PSh8-1 SS device. The results showed that after the test, the roughness of the fiberglass plate made on the basis of polyester resin by the pultrusion method decreased by 44.4%.

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Section: Introductionmentioning

confidence: 99%

Change in surface roughness of composite piles when pressing into the ground

Boyarintsev

Sukhov²,

Tumashevskaia³

2023

E3S Web Conf.

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show abstract

“…Существует ряд трибологических исследований различных типов полимерных композитов, выполнена оценка износостойкости композитов различного состава [19][20][21]. Установлено влияние величины придавливающей нагрузки при испытаниях на износостойкость [22], состава композитных материалов [23] и др.…”

Section: Introductionunclassified

Experimental investigation of surface roughness changes of an underground structure's material during its driving into the ground

Boyarintsev,

Samohina

2023

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The mechanical interaction between dispersed soils and the surface of underground structures is fundamental in generating their load-bearing capacity. The technical and economic efficiency of piles and supporting structures depends on the friction forces that appear on the contact of their material with the soil. One of the main factors which has a significant influence on friction forces is the roughness of the material surface. Installation of underground structures, such as pile driving or vibro-driven sheet piling, is accompanied by long periods of material contact with dispersed soils: some structural segments can slip on the soil for tens of metres. As a result, it is likely that the surface properties of the underground structure material will change during this process. Although there is a considerable amount of tribological research, the methodology of such experiments does not fully represent the pile driving process in the soil mass. This means that it is not possible to accurately estimate the change in the surface properties of underground structure materials as they are driven into the soil using the results of these studies. The present paper describes a simulation of an underground structure made of three different materials: steel, fibreglass and fluoroplastic; in fine medium sand. The roughness of the materials was monitored while they were moving in the sand. It was found that with increasing diving depth the roughness of each material becomes less. And the value of this change is influenced by such material properties as material density, shear strength and hardness.

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Experimental Investigation Into Changes in the Material Surface Roughness of Underground Structures During Their Driving Into Soil

Boyarintsev,

Samohina

2024

Preprint

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The mechanical interaction between dispersive soils and the surface of underground structures is fundamental in the formation of their load-bearing capacity. The technical and economic effectiveness of piles and flexible or reinforced retaining structures mainly depends on the friction forces between the structure material and the soil. One of the main factors that significantly affect friction is the surface roughness of a material. The installation process for certain underground structures, such as pile driving or vibratory pile driving, involves prolonged contact between the structure material and dispersive soils; some structural elements may slide dozens of meters through the soil. In view of this, changes in the material surface properties of an underground structure during this process may be quite likely. Despite a significant amount of tribological research, such experiments do not fully reflect the process of driving piles into soils and, accordingly, are not appropriate for evaluating with sufficient accuracy changes in the material surface properties of underground structures during this process. In this research, an immersion of an underground structure in fine sand of medium size was simulated using three different materials: steel, fibreglass and fluoroplastic. The surface roughness of the materials was monitored as they moved through the sand. It was established that the roughness of each of the materials decreased as the driving depth increased. The magnitude of this change is influenced by such material properties as density, shear strength and hardness.

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Effect of Sawdust Volume on Mechanical Properties of Composite Material

Cited by 3 publications

References 3 publications

Change in surface roughness of composite piles when pressing into the ground

Change in surface roughness of composite piles when pressing into the ground

Experimental investigation of surface roughness changes of an underground structure's material during its driving into the ground

Experimental Investigation Into Changes in the Material Surface Roughness of Underground Structures During Their Driving Into Soil

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