Runner design and sizing is one of the most important aspect of mold design. This blog covers the basics of runner, function and shapes. Next blog will cover the design aspects.
Feed System – Sprue Bush
As a start of the feed system discussion, sprue bush is the first part in mold design which is explained in this blog. Sprue bush design is important but seldom given any thought during design […]
What is a Jig & Fixture? – Intro
A brand new topic on Jigs and Fixtures which are widely used in the all manufacturing industries. In this blog, you will learn the basics of Jig & Fixture, application, classification and types. More on […]
Composites-Intro
Blog discusses the basics of composites and introduction to terminology of composite materials. Composites provide unique properties for applications and growing trend in plastics.
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.
Time-Temperature Superposition
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
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.
Yield Stress
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.
Deformation mechanisms
Polymer deformation mechanisms helps to understand how amorphous and crystalline materials modulus can be predicted. A difficult topic but explained in layman terms.
Plastic Deformation
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 […]
Viscoelastic Equations
This blog is an intro to viscoelastic equations which are key for future blogs. Some of the equations are used to create viscoelastic models.