Evaluation of single-fibre strength distribution from fibre bundle strength

1988 ◽  
Vol 23 (3) ◽  
pp. 941-945 ◽  
Author(s):  
K. K. Phani
Keyword(s):  
Fibre Bundle ◽  
Single Fibre ◽  
Strength Distribution ◽  
Fibre Strength

Determination of single fibre strength distribution from fibre bundle testings

1984 ◽  
Vol 19 (10) ◽  
pp. 3319-3324 ◽  
Author(s):  
Zhifan Chi ◽  
Tsu -Wei Chou ◽  
Guoyi Shen
Keyword(s):  
Fibre Bundle ◽  
Single Fibre ◽  
Strength Distribution ◽  
Fibre Strength

Single fibre strength of cellulosic fibre extracted from “Belatlan roots” plant

2017 ◽  
Author(s):  
M. Hanis. A. H. ◽  
M. S. Abdul Majid ◽  
M. J. M. Ridzuan ◽  
I. Fahmi
Keyword(s):  
Single Fibre ◽  
Fibre Strength ◽  
Cellulosic Fibre

scholarly journals Investigation of tensile strength and dimensional variation of T700 carbon fibres using an improved experimental setup

2019 ◽  
Vol 39 (3-4) ◽  
pp. 144-162 ◽  
Author(s):  
Faisal Islam ◽  
Sébastien Joannès ◽  
Steve Bucknell ◽  
Yann Leray ◽  
Anthony Bunsell ◽  
...  
Keyword(s):  
Large Data ◽  
Single Fibre ◽  
Experimental Methodology ◽  
Fibre Strength ◽  
Carbon Fibres ◽  
Data Set ◽  
Strength Data ◽  
Statistical Representation ◽  
Dimensional Variation ◽  
Single Fibres

Knowledge of fibre strength is crucial for understanding the failure behaviour of fibre-reinforced composite materials and structures. Measuring the properties of technical fibres has been known to be very challenging, and the different challenges associated with single fibre characterisation are illustrated in this article. An improved and automated experimental methodology for tensile testing of single fibres is described. This process has been used to generate fibre strength data for T700 carbon fibres at three different gauge lengths of 4, 20 and 30 mm. The variability in strength and modulus of short fibres was found to be much larger than that of longer fibres. Statistical analysis of this large data set has also highlighted the limitations of the standard Weibull distribution for representing fibre strength behaviour. The need for a better statistical representation of the fibre strength data in order to provide a more accurate description of the fibre strength behaviour has been emphasized.

scholarly journals Modelling snow failure with a fibre bundle model

2009 ◽  
Vol 55 (194) ◽  
pp. 997-1002 ◽  
Author(s):  
Ingrid Reiweger ◽  
Jürg Schweizer ◽  
Jürg Dual ◽  
Hans Jürgen Herrmann
Keyword(s):  
Fibre Bundle ◽  
Rupture Strength ◽  
Failure Process ◽  
Strength Distribution ◽  
Strain Rates ◽  
Snow Layer ◽  
Linear Elastic ◽  
Sintering Time ◽  
Ductile To Brittle Transition ◽  
High Degree

AbstractDry-snow slab avalanches initiate from a failure in a weak snow layer below a cohesive slab. Snow is considered as a porous ice structure, and the strength distribution of the single elements of this structure, i.e. grains and bonds between grains, shows a high degree of disorder. On the bond or microstructural level, the failure process is believed to start if the fracturing of bonds between snow grains is not balanced by the formation of new bonds. We use a statistical fracture model – a fibre bundle model – to study the failure process in a weak snow layer. The model consists of fibres of various strengths representing single snow grains between two rigid plates which represent the slab above and the substratum below the weak layer. The fibres deform in a linear elastic manner and break instantly at their rupture strength. Broken fibres may sinter (re-bond) and regain strength after a finite sintering time. We show that the different characteristic times for breaking and sintering lead to the rate dependence of snow strength. This is, to our knowledge, the first statistical model to reproduce the ductile-to-brittle transition which snow exhibits with increasing strain rate. When the model is applied to simulate experimental stress–strain curves for different strain rates, the model and experimental results are in fair agreement.

scholarly journals Extraction and characterization of natural fibres form Elettaria Cardamomum

2021 ◽  
Vol 69 (2) ◽  
pp. 30-33
Author(s):  
Murugesan Sumithra ◽  
Gayathri Murugan
Keyword(s):  
Chemical Composition ◽  
Good Alternative ◽  
Single Fibre ◽  
Natural Fibres ◽  
Fibre Strength ◽  
Cellulose Fibres ◽  
Elettaria Cardamomum ◽  
Natural Cellulose ◽  
Alternative Sources

Natural fibres are one of the good alternative sources for replacing synthetic fibres and reinforcing polymer matrices because of their eco-friendly nature. The present study was undertaken to investigate the fibres extract from Elettaria Cardamomum plant. The extracted Elettaria Cardamomum fibre was treated with NaOH for softening. Natural cellulose fibres extracted from Elettaria Cardamomum stems (ECS) have been characterized for their chemical composition and physical properties.The chemical composition of Elettaria Cardamomumstems (ECS) fi bres is, cellulose 60.44%, lignin 25.25%, wax 0.53%, ash 5.45%. Regarding physical properties of the fibres, single fibre strength was evaluated and the result was compared with cotton fibre and linen fibre.

scholarly journals Mathematical Modelling of the Interfacial Adhesion of Date Palm/Epoxy

2016 ◽  
Vol 5 (3) ◽  
pp. 29
Author(s):  
A. Shalwan ◽  
S. Oraby ◽  
A. Alaskari
Keyword(s):  
Chemical Treatment ◽  
Interfacial Adhesion ◽  
Date Palm ◽  
Mechanical Performance ◽  
Experimental Testing ◽  
Fibre Diameter ◽  
Single Fibre ◽  
Natural Fibres ◽  
Fibre Strength ◽  
Testing Procedures

<p class="1Body">In recent years, high interests has emerged to use natural fibres as alternative reinforcements synthetic due to its unique benefits regarding renewability, recyclability, degradability, lightweight, and low cost. Recent investigations revealed that the mechanical performance of fibre reinforced polymer composites (FRPCs) is predicated mainly on the interfacial adhesion of fibre with the matrices. In the current work, an empirical approach was exploited to develop mathematical models using linear regression routines available in SPSS IBM program. Such models are established to determine the functional interrelations between, each of the fibres diameters and the percentage of chemical treatment, as independent or response variables, and the interfacial bonding between the DPF and Epoxy resin. Both single fibre tensile testing (SFTT) and single fibre fragmentation testing (SFFT) are considered to study the interfacial adhesion of fibre with matrix and to reflect the real loading conditions. Such testing procedures are carried out for Date Palm Fibres (DPFs) and Date palm fibre reinforced Epoxy composites (DPFEs) with different fibre diameter (0.3-0.7 mm) under different NaOH concentrations (0-9 wt.%). Experimental testing results indicated that the optimum interfacial adhesion and strength of the fibre can be achieved with small fibre diameter when 6 wt. % NaOH concentrations is employed. The use of higher NaOH concentration generally leads to deterioration in the fibre strength. Developed models, on one hand, proved to have the capability to qualitatively and quantitatively grasp the true relationships and, on the other hand, to emphasize the high potential to utilize natural fibres as a replacement of synthetic fibres with affirmation taking into consideration the role of diameter size and chemical treatment of fibres to reach the optimum mechanical behaviour of NFRPCs.</p>

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