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182 I? BONACUSE AND S. KALLURI

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Appendix : NOMENCLATURE
Elastic Modulus
Shear Modulus

Number of cycles to failure for first load level
Number of cycles to failure for second load level
Number of cycles imposed during first load level
Actual number of cycles to failure during second load level
Imposed strain ranges for load levels 1 and 2
Total measured axial strain range
Plastic axial strain range

Equivalent plastic strain range
Plastic shear strain ranges for load levels 1 and 2
Plastic shear strain range
Total measured shear strain range
Axial stress range
Axial stress ranges for load levels 1 and 2
Axial mean stresses for load levels 1 and 2
Shear stress range
Shear stress ranges for load levels 1 and 2
Mean shear stresses for load levels I and 2