3. A particular component on a wind turbine is expected to see fatigue cycles and stresses as

shown on the attached SN Diagram. Data for points shown in orange is contained on the

accompanying Excel file. Using Miner rule determine if the component will survive the

anticipated stress cycles. Remember that the SN data is shown and plotted on a log-log format.

Actual Strains

309

Cycles Stress MPA)

2,750

2,300

1,750

1,875

1,250

875

025

300

375

250

188

125

MABORBONESES

327

345

304

382

400

418

435

473

491

309

SN Curve

Cycles Stress(MPA)

10

100

1,000,000

10,000,000

800

800

175

175

Stress MPA

1,000

300

10

100

SN Diagram

300,000

1,000,000 10,000,000