Creep under constant strain is not a practical way of evaluating a material performance. Boltzmann superposition principle explains the different stress loading profile to consider.
This blog explains superposition principle, shift factor and Arrhenius, WLF equation. This principle is very useful to get creep compliance and stress relaxation curves for different test temperatures with reference temperature curves.
Creep modulus is an important design parameter for selecting plastics for long term use. This blog takes you step by step of the importance and curves to use for design purposes.
This blog discusses crazing, shear yielding for amorphous polymers and slipping, twinning for semi-crystalline polymers. Deformation phenomenon explained thoroughly.
Polymer yield stress depends on strain rate and temperature of the testing. This blog explains the both the factors and also Eyring’s model to predict the yield stress during polymer development.
Polymer deformation mechanisms helps to understand how amorphous and crystalline materials modulus can be predicted. A difficult topic but explained in layman terms.
Here is the blog on various polymers behavior and stress/strain curves. Also covered topics are cold drawing, strain hardening and draw ratio of the polymers.
In this blog, you will learn about the how to model polymer behaviors with models. This is an intro to predict creep & stress relaxation behaviors.
In continuation of “Four Regions of Viscoelastic Behavior”, this blog takes about the Creep and Stress Relaxation Response Diagrams in four mechanical states of polymer. Yes, It is very theoretical subject but important to know […]
This blog is an intro to viscoelastic equations which are key for future blogs. Some of the equations are used to create viscoelastic models.
This blog explains the four regions of polymer state under temperature or loading and how modulus changes in each state. Please watch other viscoelastic blog before watching this blog for better understanding.
In this blog, we take you through the basics of creep curves, why it is important for long-term testing and how it is created.
In this blog, we walk you through the basic short term testing of polymers , especially tensile and flex test including the basics of viscoelastic behavior.
In this blog, you will learn how to compare materials on strength and stiffness of the material and the calculation on a beam example.
Here in this blog, you will learn about the ways plastics can degrade from a chemical attack.