*** Please note, each row and course# listed below is a separate, complete course. ***
Understanding Dynamic Properties of Rubber and Rubber Products
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Coming Soon |
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Online Registration
CEU's: 1.6
Instructor: John Dick and Karl Winkler
Course Overview
This two-day course gives a thorough review of dynamic properties from A to Z. It defines rubber dynamic properties in practical terms. Special attention is given to performance applications of rubber components and parts. A review of different properties of rubber itself and how these different properties are affected by formulation changes are also discussed. This course includes an effective balance between the practical and theoretical aspects of rubber dynamic properties.
Online Course Requirements
We want you to have a great experience participating in our remote (online) courses, and for that, you’ll need the right equipment and internet connection.
Minimum needs are:
- A broadband internet connection that has at least a 2 Mbps upload and download speed.
- A computer (PC or Mac) that can support the latest web browser versions.
- At least 4 GB of RAM and adequate hard drive space.
- A microphone and a speaker.
- International Students: For virtual (online) courses, an additional fee will be assessed to cover the cost of shipping the professional binder (presentation slides), to your address. The cost of international shipping can be significant.
For more information, visit our Online Course Requirements webpage.
Instructor Biography:
John S. Dick, a senior rubber scientist with Alpha Technologies, has over thirty years of experience in the rubber industry. Mr. Dick has authored over 50 journal and magazine publications and four books on polymer technology. He received the Monsanto Master Technical Service Award in 1994, the ACS Rubber Division Best Paper Award in 1995 and a University of Akron Appreciation Award in 1998 for Teaching Polymer Compounding Courses in their Continuing Education Program. He is a Fellow of ASTM International receiving the Award of Merit in 1990. In addition, he has represented the United States as a delegate to the ISO for the last 20 years. He was appointed in 1992 to be Leader of the U.S. Delegation to ISO TC-45 on Rubber. Mr. Dick teaches rubber technology courses at both University of Akron and University of Wisconsin continuing education departments. He received his B.S. degree from Virginia Polytechnic Institute in 1970 and an M.A. from the University of Akron in 1979.
Day 1: Part 1 - Basic Principles of Rheology and Dynamic Properties of Rubber
ELASTIC QUALITY
- Hooke's Law
- Modulus
- Exercises
VISCOUS QUALITY
- Flow
- Viscosity
- Calculation of Viscosity
- Newtonian Fluids
- Non-Newtonian Behavior
- Exercises
VISCOELASTIC QUALITY
- Voigt and Maxwell Models
- Illustrations
- Creep Experiments
- Stress Relaxation Experiments
SINUSOIDAL DEFORMATION AND RESPONSES
- S', S", S*, Phase Angle, Tan
- Rebound
- Uncured tan
- Cure tan
- Exercise
INSTRUMENT CONFIGURATIONS AND MEASURE UNITS
- Ranges of test conditions
- Types of tests
- Frequency Sweep
- Strain Sweep
- Temperature Sweep
- Cure Test
- Time Sweep
- Test configurations for polymer characterization
- Test configurations for Processability
- Test configurations for cure and after-cure dynamic property measurements
- Die cavity vs unsealed cavity
- Calculation of % strain for angle of oscillation
- Laminar movement
- Estimating Pressure
- Exercise
SHEAR MODULUS
- G', G", G*
- Calculations and Use of Conversion Factors
- Vector Analysis
- Use of G' vs S' in High Strain Sweep
- Exercise
DYNAMIC VISCOSITY
- eta', eta", eta *
- Calculation from G', G" and G*
- Calculation of Shear Rates
- Cox-Merz Rule
- Exercise
COMPLIANCE
- J', J", J*
- Calculation from G', G", and G*
- Relevance
- Exercise
EXTENSION/COMPRESSION MODULUS
- E', E", E*
- Relation of E to G
- Poisson's Ratio
- MTS vs RPA Testing
- D', D", D*
- Calculation of D from E
- Exercise
SPRING RATE CONSTANTS AND DAMPING COEFFICIENTS
- Spring Rate Definition
- K', K", K*
- Vector Analysis
- Damping Coefficients
TIME AND TEMPERATURE DEPENDENT PROPERTIES
- Definition of WLF
- Examples of WLF with Polymers and Mixed Stocks
Day 1: Part II Applications - Testing and Evaluating Dynamic Properties in Rubber Materials and Rubber Products
WHICH DYNAMIC TEST METHOD TO USE
- Free Vibration – Yerzley, Rebound, Bayshore, Lupke
- Forced Vibration – DMS, DMTA, RSA, RPA
SYSTEM APPLICATION TESTS
- Frequency
- Natural frequency
- Damped Natural Frequency
- Forced Vibration
- Free Vibration
- Mode of Vibration
- Single Degree of Freedom System
- Multiple Degree of Freedom System
- Resonance
- Harmonic
AUTOMOTIVE NVH TERMS
- Lateral, Fore & Aft
- Longitudinal
- Pitch
- Yaw
- Roll
- Buzz
- Boom
- Roar
- Crowds
- Harshness
- Plushness
- Shake
- Shuffle, Bobble
- Road Noise, Buzz
Day 2
AUTOMOTIVE APPLICATIONS
- Transverse Engine Six Degrees of Freedom
- Vertical Bounce Mode Effect on Vehicle
- Single Degree of Freedom System
- Natural Frequency of Resonant Frequency
- Inertance Transfer Function
- Evaluating Rubber Damping – Log Decrement Technique
- Two Degrees of Freedom Systems
VIBRATION DAMPER DESIGN PROCEDURE
- Tuned Vibration Absorbers
- Shear Modulus vs. Durometer Hardness
- Mass Ratio
- Tuning Ratio
- Damping Level
FORCED VIBRATION TESTING OF RUBBER MATERIALS AND PRODUCTS
- Examples
- Mold Bonded Compression
- Quad Lap Shear (QLS)
- Dynamic Stiffness
- MTS Shape Factor
- Strain Sweeps
- Compressive Static Graphs
- Effects of Surface Conditions, Bonding, Sandpaper, Dry/Clean, Talc, Vasoline
- Frequency Sweep
- Material Transmissibility
- Pre-strain Sweep
- Temperature Sweep
- Heat Build Up
MECHANICAL FATIGUE TESTING OF RUBBER
- Fatigue Life and Crack Growth
- Primary Failure
- Secondary Failure
- Fatigue Test Control Methods
- Stress Control (Load Control)
- Strain Control (Displacement Control)
- Indirect Control
- Calculated Variables
- Spectrum
- Remote Parameter Control (RPC)
- Engine Mount Fatigue Graphs
- Crack Initiation and Growth, Micro Cracking, Strain Energy and Crack Propagation
Day 2: Part III - Compounding Rubber for Dynamic Properties
ELASTOMERS
- Important Elastomer Properties (Tg, MW, MWD, LCB)
- Plastic vs. Rubber
- Kinetic Theory of Rubber Elasticity
- Molecular Motions in Different Regions of the Master Curve
- Time Temperature Superpositioning (WLF Equation)
- Effects of Chemical Structure on Glass Transition (Tg)
- Main Chain Flexibility, Steric Hindrance, Symmetry, Branching,MW
- Effects of Blending
- Natural Rubber (NR)
- Polyisoprene (IR)
- Polybutadiene (BR)
- Styrene Butadiene Rubber (SBR)
- EPDM
- Polychloroprene (CR)
- Butyl Rubber (IIR)
- Nitrile Rubber (NBR)
- Silicone Rubber (Q)
PLASTICIZERS
- Predictive Equation for Tg
- Compatibility
VULCANIZATION
- Optimal Cure
- Effects of Crosslink Type
CARBON BLACK
- Carbon Black Reinforcement
- Effects of Surface Area
- Effects of Structure
- Effects of Surface Activity
COMPOUND MIXING
- Effects of Mixing on Strain Amplitude Dependence of G’ and Tan delta
- Dispersion vs. Fill Factor