Blog discusses the basics of composites and introduction to terminology of composite materials. Composites provide unique properties for applications and growing trend in plastics.
Category: Material Behavior
Fracture Mechanics – Intro
This blog introduces to the theory of fracture mechanics for plastics. Although this is an intro, it can be too theoretical for some, but necessary to understand the concepts.
Boltzmann Superposition Principle
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.
Polymer Deformation Mechanisms
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.
Viscoelastic Models – Intro
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.
Creep & Stress relaxation response diagrams
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.
Four Regions of Viscoelastic behavior
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.
Creep Curves – Explained
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.
Short term testing of polymers
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.