Mechanical Properties Of Fishing Lines 4h3v31

Fishing Line Case Study S3: This case study is about the different mechanical properties of fishing lines and how these can affect the effectiveness of the fishing lines. There are three main types of fishing lines with different advantages and disadvantages. Types of Fishing Lines Monofilament   

The most common type of fishing line used for bait and lure fishing. Popular ones are made from nylon and is a single filament resulting from a complex mixture of different types of nylon polymers. A cheap, reliable line formed by extruding molten plastic through a die to form a single strand. High stretch and low visibility makes it suited for freshwater fishing in streams and lakes.

Braided     

Made from Dracon and used to be popular before monofilaments lines improved. Strongest type of fishing line, and doesn’t stretch which is very useful for deep sea fishing. Doesn’t deteriorate over time and has high durability. Floats on water when cast. It chafes easily and is easily visible in water. There are also braided lines made from gel- spun polyethylene fibre strands, called superlines/microfilaments. The fibres can also be fused together to make fused lines with same properties as braided lines

Fluorocarbon 

Made from a fluorine polymer bonded to carbon. Has a refractive index near that of water, so is almost invisible under water and visible above it, helpful for fishing in clear lakes.

S5: Mechanical Properties of fishing lines

Property Breaking Strength/Strain

Description

Monofilament

The maximum amount of load or weight a fishing line can bear before it breaks.

Strength easily reduced if been submerged in water more than 24 hours. Nylon easily absorbs water so line reaches its saturation point

Braided

Fluorocarbon

and starts breaking down, reducing strength by up to 30%.

Diameter

Knot Strength

Elasticity/Stretch

Abrasion Resistance

Limpness/Flexibility

UV & Chemical Resistance

The larger the diameter, the greater the breaker strength. Thinner lines pit less pressure on the line and have less water resistance, also easily cutting through water. Tying knots in lines weakens them, reducing breaking strength. A line which can easily stretch has its advantages and disadvantages. Ultimate Elongation is the maximum amount a line can stretch before breaking. A measure of easily a line scuff, nicks or scratches when it’s rubbed against a hard object. A measure of how much force it takes to bend a line and how quickly it recovers. Limp lines give further casting distance. Resistance of line is to UV light & chemicals.

Superlines/microfilament lines are an exception with small diameters but high strength.

It is weakened by knotting.

It has very high knot strength.

High stretch but can stretch by up to 30% when wet. Good quality lines can easily return to their normal state after a lot of stretching.

Low stretch making it more sensitive so it’s easier to detect fish grabbing a line.

Some stretch but less than monofilament’s.

High abrasion resistance

Low Abrasion resistance

High Abrasion Resistance

Flexibility varies a lot.

High flexibility.

This is weakened by exposure to UV light in sunlight.

S5: Young’s Modulus The Young Modulus is a property of materials and occurs when they are put under tensile stress. Young Modulus = stress(Pa)/strain

Not affected by UV

(E is the Young Modulus,

is the stress and is the strain)

The formula for stress is: 2

Stress= Force(N)/Cross-sectional area (m )

The formula for strain is

Sources: http://pleasurefishing.com/html/fishingline.html http://www.fish-uk.com/tackle_fishing_line.htm http://www.gofishn.com/content/line#Types http://www.ultimatefishing.info/choosing-the-right-fishing-line.html http://www.cortlandline.com/content.asp?id=710 http://www.cyberphysics.co.uk/topics/forces/young_modulus.htm

Found on Tue: http://www.sportfishingmag.com/techniques/rigs-and-tips/line-test2011?page=0,1&cmpid=fb http://www.allfishingbuy.com/Fishing-Accessories/Fishing-LineMonofilament.htm http://www.allfishingbuy.com/Fishing-Line.htm#site12 http://www.sportfishingmag.com/techniques/rigs-and-tips/fishing-line-101

Found weds- tacklebox