Measuring Residual Stresses in Glass Products

    Bring Your Own Test Samples for HANDS-ON Experience!

    How You Will Benefit Using non-destructive photoelastic methods of stress analysis in your Quality Control process will improve yield, productivity, and help prevent costly field failures.

    Who Should Attend Glass industry professionals, especially those in R&D and QC functions, including process engineers, QC technicians and supervisors, production personnel involved in product quality, and R&D and manufacturing engineers.

    ASTM Referenced Standards
    * C148 Polariscopic Examination of Glass Containers

    * C770 Measurement of Glass Stress-Optical Coefficient

    * C978 Photoelastic Determination of Residual Stress in a Transparent Glass Matrix Using a Polarizing Microscope and Optical Retardation Compensation Procedures

    * C1048 Standard Specification for Heat-Treated Flat Glass

    * C1279 Non-Destructive Photoelastic Measurement of Edge and Surface Stresses in Annealed, Heat-Strengthened, and Fully Tempered Flat Glass

    * C1377 Calibration of Surface Stress Measuring Devices

    * C1426 Verification and Calibration of Polarimeters

    * F218 Analyzing Stress in Glass

    Course Outline
    Class Hours 8:00 am to 4:00 pm
    Principles of Stress Measurement in Glass Products
    * Polarized Light and Photoelasticity

    * Color Observation and Compensation

    * Stress-Optical Constant and Material Calibration

    * Units of Measurement

    Heat-Treated Glass Applications
    * Tempered and Heat-Strengthened Glass

    * Architectural and Solar Glass

    * Automotive Glass

    * Measurement of Surface and Edge Stresses to ASTM standards

    * Mechanical Strength and Fragmentation

    Container and Specialty Glass Applications
    * Annealing Considerations

    * Relevant ASTM Standards and Test Methods

    * Strain Discs and Temper Number Evaluation

    * Analyzer Rotation and Other Techniques

    * Working with Difficult Geometries

    Verification, Maintenance and Calibration

    * Self-Calibration and Verification of Instruments* Proper Maintenance Procedures

    Instrument Practice and Sample Testing (Time Permitting)

    * Supervised hands-on instruction and guidance using either Strainoptics' or participant's glass samples and stress measurement equipment.

    About ASTM and Sponsoring Committee Established in 1898, ASTM is one of the largest voluntary standards development organizations in the world. ASTM standards have grown to be among the world’s most widely used and accepted documents. The 82-volume Annual Book of ASTM Standards (available in print and on-line) contains 12,000 standards written by 34,000 members on 140 technical committees. These standards are widely used throughout the world as the basis of purchasing and other contracts, codes, laws and regulations. ASTM Committee C14 on Glass and Glass Products developed the standards referenced in this course.

    About the Instructors

    Joel Feingold, president of Strainoptics, Inc., has more than 30 years of experience in process control technologies and stress measurement instrumentation. An author of many technical articles and co-author of several ASTM standards, Feingold is an active member of ASTM Committees C14 and D20. He is also chairman of the Optical Distortion Subcommittee and serves on the Engineering Standards Committee of the Glass Association of North America (GANA).

    Tim Wilson is manager of engineering services at Strainoptics and an electrical engineering graduate of Drexel University. For more than 10 years, he has traveled the world commissioning instruments and providing technical and operator training for customers in all types of industries, from glass and plastics to advanced materials and biomedical devices. His expertise in polarimetry and knowledge of relevant ASTM specifications and test methods uniquely qualifies him to effectively communicate the principles and practical applications of photoelastic stress analysis to audiences at every academic and professional level.

    Stress Measurement Instrumentation to be Demonstrated
    * Laser GASP Surface Stress Polarimeter

    * Auto-GASP System with Surface Stress Measurement Software

    * GES-100 and GES-100-MWA Edge Stress Meters

    * PES-100 Automatic Edge Stress Measurement System

    * PS-100 Macro-Video Polarimeter System

    * DIAS-1600 Digital Image Analysis System

    * SV-1000 Strain Viewer (Polariscope)