FraQ WC System Components
Using the latest in data acquisition hardware, combined with DiJon's FraQware software, data analysis has
never been easier. Specimen dimensions are entered into a dedicated laptop computer, correction factors are calculated and
the test is ready to start. Once the test is finished, FraQware guides the operator through the analysis process and then
generates a test report, all within 10 minutes. No more guessing where the high and low points are on each unloading-reloading
cycle, drawing the ideal release path or the average load line between the ideal elastic release lines. FraQware does it all
using the thousands of data point taken during a test.
WEDM Specimen Cutting Fixture
DiJon's WEDM Specimen Cutting Fixture is specifically designed for cutting the "chevron-notch" required in
the B771 Standard. It is fully adjustable and will fit all major Wire EDM Machines.
Mercury Vacuum Pump
The Mercury Vacuum Pump is for single-point air purging of the FraQ WC Test System. This process eliminates
loosening multiple pressure connections during maintenance or when replacing a Flatjack and insures complete removal of air from
the Test System.
System Comparison Table
| |
Fractometer™ |
FraQ WC |
Calibration-Pressure
Transducer (load) |
Single Point
2,000 psi |
Ten Point
(500 psi increments) |
Calibration-Displacement
Transducer |
None |
Ten Point
(.001* increments) |
Pressure Transducer
Linearity |
1% FS (15 ksi transducer) |
.5% FS (5 ksi transducer) |
Load Displacement
Data |
X-Y Recorder
No digital record |
Computer — 10 Mhz
sample rate |
Specimen Dimension
Correction Factors (Cc) |
Technician calculated |
Computer generated — automatic |
| KIC Data Analysis |
Operator Estimated |
Computer generated |
| Permanent Test Record |
X-Y Plot |
Three digital data files |
| Re-analyze Data |
No |
Yes |
| Re-enter Specimen Dimensions & Re-analyze |
No |
Yes |
| Chevron-notch Geometry |
Varies per specimen |
Each specimen identical* |
| Air Purging the System |
Multiple points |
Single point |
Location of Linear Displacement Transducer on the Test Speciment
|
Varies (LPO)
|
Identical location for each specimen (LDT)
|
*Per set-up of the Specimen Cutting Fixture to the WEDM machine.
Fractometer™ is a registered trademark of TerraTek Systems