What does initial modulus mean?
Young’s modulus or the initial modulus (IM) is a measure of the amount of deformation that is caused by a small stress. Materials with a high modulus, often called stiff or hard materials, deform or deflect very little in the presence of a stress.
What is tenacity of yarn?
Tenacity. The term generally used in yarn manufacture and textile engineering to denote the strength of a yarn or of a filament of a given size. Numerically it is the grams of breaking force per denier unit of yarn or filament size; grams per denier, gpd.
What does high Youngs modulus mean?
Young’s modulus is defined as the ratio of stress below the proportional limit to the corresponding strain. It is a measure of the rigidity or stiffness of a material. … The greater the modulus, the stiffer the material; in other words, the elastic strain resulting from the application of a given stress is smaller.
Does cotton have high or low modulus?
According to the literature, the intrinsic Young’s modulus of cotton fibers is found between 5 and 13 GPa, however, this value seems too low compared with the values obtained for other strands [11,12,23,24,25,26,27,28].
What is modulus in textile?
Modulus as a general term means the slope of the force-elongation curve and it is a measure of the stiffness of the material, that is its resistance to extension. The higher the modulus of a material, the less it extends for a given force.
What is denier formula?
Denier means yarn grams per 9000m, So, Denier=8/100*9000=720D. When weave this yarn into 1m*1m square fabric, lets calculate what’s the weight will be per square meter (gsm). GSM=D/9000m*1000mm/2.54mm*2.
What is strength of yarn?
Strength of yarn: This is one of the most important factor which influence yarn breakages. It is the force in gms weight or pound required to break the yarn. … The factor of elongation plays a very critical role in reduction of the yarn breakages. The elongation depends upon the length of the fiber and also on T.P.I.
What is stiffness modulus?
3 Stiffness Modulus. The stiffness modulus of bituminous mixtures is fundamental to the analysis of the stress–strain response of pavement under traffic loading. It can be measured using various methods such as the resilient modulus test, indirect tensile test and uniaxial direct tensile test.