SC300 Datasheet, PDF (1/1 Pages) Vishay Siliconix – Strain Measuring Systems Short Course

SC300
Vishay Micro-Measurements
Strain Measuring Systems Short Course
STRAIN MEASURING SYSTEMS – FIVE DAYS
This program is presented in a format that includes several hands-on laboratory exercises. Liberal use of demonstrations and
case studies provides attendees with a first-hand opportunity to learn how to select the procedures and techniques best suited
to their strain measurement needs.
The program begins with an overview of stress analysis principles. Following a review of the performance characteristics of the
strain gage and selection criteria, several laboratory projects are conducted in which strain gages are bonded, electrical
connections completed, environmental protection applied and installation integrity verified. The strain data are then collected with
measuring instrumentation and compared to calculated theoretical values. In a more advanced laboratory projects, a basic
weighing scale is constructed and calibrated, and a three-element strain gage rosette is used to measure strains and calculate
the pressure in a thin-walled vessel. In the course of these laboratory projects, all attendees have an opportunity to use three
popular adhesive systems.
A thorough review of strain gage instrumentation is augmented by numerous demonstrations and hands-on experiments that
highlight important features of modern strain measuring instruments. Digital data acquisition principles and practices are
discussed, including the relationship between the sampling rate and signal frequency. Anti-aliasing techniques are demonstrated
and the phase relationship of input to output are described. The use of strain gages and related instrumentation in transducer
applications is also explored. Special-purpose sensors are reviewed, with emphasis on their application to strain measurements
and structural test programs.
The course ends with a discussion of methods for locating stress concentrations in a complex strain field using modern optical
techniques.
Provision is made for attendees to discuss their specific test requirements with members of the Vishay Micro-Measurements
technical staff.
Topics include:
Concepts of Stress and Strain
• Uniaxial and Biaxial Strain
• Hooke's Law
• Principal Stresses and Strains
• Superposition Concept
Strain Gage Characteristics
• Backings and Sensing Elements
• Performance Characteristics
Gage Installation Techniques
• Bonding Methods
• Leadwire Installation
• Environmental Protection
Transducers
• Design Considerations
• Bridge Circuits
Instrumentation Considerations
• Wheatstone Bridge Circuitry
• Bridge Excitation and Thermal Effects
• Leadwire Effects
• Bridge Balance Control
• Shunt Calibration and Calibrators
• Static/Dynamic Strain Measurement
• Switching and Multiplexing
• Electrical Noise Control
• Checkout and Troubleshooting
Full-Field Strain Measurements
• Locating Stress Concentrations
• Interpreting the Strain Field
• Selection and Applications of PhotoStress^®
Case Histories
Document Number: 11046
Revision: 19-Nov-03
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www.vishaymg.com
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