I am studying the mechanical properties of biopolymeric films for food packaging applications. The tensile strength of my material is increasing with increased filler addition. However, no substantial effect is seen on Young's modulus. Is it possible or an experimental error somewhere? I want to know how Tensile strength depends on Young's Modulus.
For packaging, check two parameters like tensile strength and elongation which are inversely proportional. If your TS increased with addition of filler that is showing positive effect. However, you have to see the flexibility too, it should not be rigid. You can check some of our papers on packaging.
I hope the link below is helpful
http://www.ifrj.upm.edu.my/23%20(04)%202016/(42).pdf
Elastic modulus or Young modulus only refers a relation between tension and deformation in the elastic region of a tensile test (region where the deformation is reversible). The tensile strenght refers to the overall strenght applied to cause rupture, including the elastic, plastic and other "blended" regions. Therefore your filler must be causing effect in the plastic deformation. Elastic reflects bonds stretching and plastic the movement of athoms or molecules
Young’s modulus(E) evaluates the elasticity of a material, which is the relation between the deformation of a material and the power needed to deform it.
Tensile strength is the value of the maximum stress that a material can handle. This is the limit between plasticity zone and rupture zone.
Most fillers can be considered the addition of an impurity or a contaminant. In other words "dirt" if it is is in particle form. The more the dirt the greater the rupture of continuity and the lesser strength.
If other type of filler the reverse happens the greater the addition of say a fibery material the greater your tensile strength
Ultimate tensile strength (UTS), often shortened to tensile strength (TS) or ultimate strength, is the maximum stress that a material can withstand while being stretched or pulled before failing or breaking.
Young's modulus, E, can be calculated by dividing the tensile stress by the extensional strain in the elastic (initial, linear) portion of the stress–strain curve.
Check this reference out:
Article The relationship among tensile strength, Young's modulus, an...
Hi Ruchir Priyadarshi. In general, there will be a change in young's modulus with the addition of an additive. In depends on the young's modulus of the additive used and its mass fraction. Do you observe a significant change in density?
Hi. You should check Tensile strength and elongation at break if you are checking the mechanical properties of composite packaging materials since both are inversely proportional and equally important for packaging materials.
Generally in addition of fillers like Cnc's and MCC's in polymer matrix.The tensile strength as well as tensile modulus must increases because composite material becomes more stiffer.That is it can bear more load and will thus undergo less deformation.
Tensile strength is amount of load per unit area the material can withstand axial load till it breaks and tensile modulus defines the strain levels at the maximum load thus the stiffness.
A material can have both higher depending on the matrix as well as the reinforcement
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