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Short Course SC300 - Strain Measuring Systems
Five Days
This program is presented in a format which 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.
Beginning with a review of stress analysis
principles, the course moves to methods of locating
stress concentrations in a complex strain field using
modern optical techniques. Performance
characteristics of the strain gage and selection
criteria come next, followed by several laboratory
projects 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
project, a basic weighing scale is constructed and
calibrated. All attendees have an opportunity to use
three popular adhesive systems during the
construction of the laboratory projects.
A thorough review of strain gage instrumentation is
augmented by numerous demonstrations and hands-on
experiments which highlight important features of
modern strain measuring instruments. 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.
Provision is made for attendees to discuss their
specific test requirements with members of the Vishay
Measurements Group technical staff.
Topics include:
Concepts of Stress and Strain
- Uniaxial and Biaxial Strain
- Hooke's Law
- Principal Stresses and Strains
- Superposition Concept
Full-Field Strain Measurements
- Locating Stress Concentrations
- Interpreting the Strain Field
- Selection and Applications of PhotoStress®
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
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