VIRTUAL TESTING / CDS WORKBENCH
ASTM D3479 · Tension–tension fatigue
Measures fatigue behavior of unnotched composite coupons under repeated tensile loading of constant amplitude.
Analytical / measured-data assessment
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Recorded instructional case · Workbench captures and saved calculation data, October 2026. This website preview does not run the test.
Specimen & fixture
Calculated assessment
Stress amplitude (MPa)
log10(cycles)
View plotted values
| Series | log10(cycles) | Stress amplitude (MPa) |
|---|---|---|
| Supplied Basquin S–N calibration | 3 | 150.35617008818167 |
| Supplied Basquin S–N calibration | 3.04 | 148.97769643510082 |
| Supplied Basquin S–N calibration | 3.08 | 147.61186070443526 |
| Supplied Basquin S–N calibration | 3.12 | 146.2585470310159 |
| Supplied Basquin S–N calibration | 3.16 | 144.9176406119318 |
| Supplied Basquin S–N calibration | 3.2 | 143.5890276967915 |
| Supplied Basquin S–N calibration | 3.24 | 142.27259557807338 |
| Supplied Basquin S–N calibration | 3.2800000000000002 | 140.9682325815646 |
| Supplied Basquin S–N calibration | 3.32 | 139.67582805688767 |
| Supplied Basquin S–N calibration | 3.36 | 138.3952723681138 |
| Supplied Basquin S–N calibration | 3.4 | 137.1264568844625 |
| Supplied Basquin S–N calibration | 3.44 | 135.86927397108622 |
| Supplied Basquin S–N calibration | 3.48 | 134.6236169799396 |
| Supplied Basquin S–N calibration | 3.52 | 133.3893802407326 |
| Supplied Basquin S–N calibration | 3.56 | 132.166459051966 |
| Supplied Basquin S–N calibration | 3.6 | 130.9547496720498 |
| Supplied Basquin S–N calibration | 3.64 | 129.75414931050258 |
| Supplied Basquin S–N calibration | 3.68 | 128.56455611923187 |
| Supplied Basquin S–N calibration | 3.7199999999999998 | 127.38586918389385 |
| Supplied Basquin S–N calibration | 3.76 | 126.21798851533322 |
| Supplied Basquin S–N calibration | 3.8 | 125.06081504110062 |
| Supplied Basquin S–N calibration | 3.84 | 123.91425059704841 |
| Supplied Basquin S–N calibration | 3.88 | 122.77819791900325 |
| Supplied Basquin S–N calibration | 3.92 | 121.65256063451515 |
| Supplied Basquin S–N calibration | 3.96 | 120.53724325468197 |
| Supplied Basquin S–N calibration | 4 | 119.43215116604917 |
| Supplied Basquin S–N calibration | 4.04 | 118.33719062258352 |
| Supplied Basquin S–N calibration | 4.08 | 117.2522687377206 |
| Supplied Basquin S–N calibration | 4.12 | 116.17729347648516 |
| Supplied Basquin S–N calibration | 4.16 | 115.1121736476836 |
| Supplied Basquin S–N calibration | 4.2 | 114.05681889616834 |
| Supplied Basquin S–N calibration | 4.24 | 113.01113969517264 |
| Supplied Basquin S–N calibration | 4.28 | 111.97504733871617 |
| Supplied Basquin S–N calibration | 4.32 | 110.94845393407985 |
| Supplied Basquin S–N calibration | 4.36 | 109.93127239434996 |
| Supplied Basquin S–N calibration | 4.4 | 108.9234164310304 |
| Supplied Basquin S–N calibration | 4.4399999999999995 | 107.9248005467227 |
| Supplied Basquin S–N calibration | 4.48 | 106.93534002787324 |
| Supplied Basquin S–N calibration | 4.52 | 105.95495093758709 |
| Supplied Basquin S–N calibration | 4.5600000000000005 | 104.98355010850716 |
| Supplied Basquin S–N calibration | 4.6 | 104.02105513575951 |
| Supplied Basquin S–N calibration | 4.64 | 103.0673843699624 |
| Supplied Basquin S–N calibration | 4.68 | 102.12245691030026 |
| Supplied Basquin S–N calibration | 4.72 | 101.18619259766065 |
| Supplied Basquin S–N calibration | 4.76 | 100.25851200783428 |
| Supplied Basquin S–N calibration | 4.8 | 99.33933644477732 |
| Supplied Basquin S–N calibration | 4.84 | 98.4285879339357 |
| Supplied Basquin S–N calibration | 4.88 | 97.52618921563032 |
| Supplied Basquin S–N calibration | 4.92 | 96.63206373850304 |
| Supplied Basquin S–N calibration | 4.96 | 95.74613565302283 |
| Supplied Basquin S–N calibration | 5 | 94.86832980505136 |
| Supplied Basquin S–N calibration | 5.04 | 93.99857172946756 |
| Supplied Basquin S–N calibration | 5.08 | 93.13678764385068 |
| Supplied Basquin S–N calibration | 5.12 | 92.28290444222124 |
| Supplied Basquin S–N calibration | 5.16 | 91.4368496888395 |
| Supplied Basquin S–N calibration | 5.2 | 90.59855161206048 |
| Supplied Basquin S–N calibration | 5.24 | 89.76793909824566 |
| Supplied Basquin S–N calibration | 5.279999999999999 | 88.94494168573029 |
| Supplied Basquin S–N calibration | 5.32 | 88.1294895588459 |
| Supplied Basquin S–N calibration | 5.359999999999999 | 87.32151354199816 |
| Supplied Basquin S–N calibration | 5.4 | 86.52094509379816 |
| Supplied Basquin S–N calibration | 5.4399999999999995 | 85.72771630124839 |
| Supplied Basquin S–N calibration | 5.48 | 84.94175987398135 |
| Supplied Basquin S–N calibration | 5.52 | 84.1630091385514 |
| Supplied Basquin S–N calibration | 5.5600000000000005 | 83.39139803277865 |
| Supplied Basquin S–N calibration | 5.6 | 82.62686110014499 |
| Supplied Basquin S–N calibration | 5.640000000000001 | 81.86933348424121 |
| Supplied Basquin S–N calibration | 5.68 | 81.11875092326531 |
| Supplied Basquin S–N calibration | 5.720000000000001 | 80.37504974457092 |
| Supplied Basquin S–N calibration | 5.76 | 79.63816685926618 |
| Supplied Basquin S–N calibration | 5.8 | 78.90803975686146 |
| Supplied Basquin S–N calibration | 5.84 | 78.18460649996688 |
| Supplied Basquin S–N calibration | 5.88 | 77.46780571903788 |
| Supplied Basquin S–N calibration | 5.92 | 76.75757660716934 |
| Supplied Basquin S–N calibration | 5.96 | 76.05385891493721 |
| Supplied Basquin S–N calibration | 6 | 75.3565929452874 |
| Supplied Basquin S–N calibration | 6.04 | 74.66571954847173 |
| Supplied Basquin S–N calibration | 6.08 | 73.98118011703016 |
| Supplied Basquin S–N calibration | 6.12 | 73.30291658081916 |
| Supplied Basquin S–N calibration | 6.16 | 72.63087140208533 |
| Supplied Basquin S–N calibration | 6.2 | 71.9649875705847 |
| Supplied Basquin S–N calibration | 6.24 | 71.30520859874629 |
| Supplied Basquin S–N calibration | 6.279999999999999 | 70.65147851688029 |
| Supplied Basquin S–N calibration | 6.32 | 70.00374186843007 |
| Supplied Basquin S–N calibration | 6.359999999999999 | 69.36194370526785 |
| Supplied Basquin S–N calibration | 6.4 | 68.72602958303318 |
| Supplied Basquin S–N calibration | 6.4399999999999995 | 68.09594555651465 |
| Supplied Basquin S–N calibration | 6.48 | 67.47163817507342 |
| Supplied Basquin S–N calibration | 6.52 | 66.85305447810912 |
| Supplied Basquin S–N calibration | 6.5600000000000005 | 66.24014199056698 |
| Supplied Basquin S–N calibration | 6.6 | 65.63284871848658 |
| Supplied Basquin S–N calibration | 6.640000000000001 | 65.03112314459084 |
| Supplied Basquin S–N calibration | 6.68 | 64.43491422391601 |
| Supplied Basquin S–N calibration | 6.720000000000001 | 63.84417137948134 |
| Supplied Basquin S–N calibration | 6.76 | 63.25884449799868 |
| Supplied Basquin S–N calibration | 6.8 | 62.67888392562119 |
| Supplied Basquin S–N calibration | 6.84 | 62.10424046373126 |
| Supplied Basquin S–N calibration | 6.88 | 61.534865364766965 |
| Supplied Basquin S–N calibration | 6.92 | 60.970710328086646 |
| Supplied Basquin S–N calibration | 6.96 | 60.411727495871624 |
| Supplied Basquin S–N calibration | 7 | 59.85786944906638 |
Set up in CDS
- Link the coupon and define maximum force and tensile R.
- Enter the measured Basquin calibration at the same R.
- Set frequency, requested cycles and calibration bounds.
- Review the S–N curve and interpolated life estimate.
Stress amplitude and mean stress reportingCalibration-specific constant-amplitude lifeFrequency converts cycles to test duration
Inputs for this recorded case
- 130 × 25 × 2 mm
- 16 plies / 2 mm
- Selected force 10000 N
- Explicit source calibration/properties
These are teaching-case inputs, not ASTM-prescribed specimen dimensions or acceptance criteria.
Readout & interpretation
- Maximum tensile stress
- 200 MPa
- Minimum tensile stress
- 20 MPa
- Stress amplitude
- 90 MPa
- Mean tensile stress
- 110 MPa
- Calibrated life estimate
- 169,400 cycles
- Requested / calibrated life
- 0.5905 —
All recorded readouts
- Maximum tensile stress
- 200 MPa
- Minimum tensile stress
- 20 MPa
- Stress amplitude
- 90 MPa
- Mean tensile stress
- 110 MPa
- Calibrated life estimate
- 169,400 cycles
- Requested / calibrated life
- 0.5905 —
- Amplitude at requested cycles
- 94.87 MPa
- Requested duration
- 20,000 s
Illustrative Basquin coefficients. Use measured calibration at the same R and environment.
About this ASTM reference
Standard Test Method for Tension-Tension Fatigue of Polymer Matrix Composite Materials
Active catalog edition checked October 10, 2026. The official standard defines the physical method; the CDS example below has a narrower modeling scope. Full procedures remain on ASTM’s site.
Find this setup in Workbench
Opens the connected guided study. Select the matching ASTM setup in the Test menu to inspect its fixture.
What this CDS case represents
Read the actual ASTM standard ↗Illustrative Basquin coefficients. Use measured calibration at the same R and environment.
This analytical or measured-data model provides its own curves and metrics. Synchronized failure playback is not supported; a mounted fixture view does not imply that contact, crack growth or impact history is solved.
Instructional model comparison, not experimental validation or ASTM certification. Physical testing requires the licensed standard and a qualified test program.