Appendix A A.0 glossary A.1 abbreviations

a	— Amplitude; crack or flaw dimension; measure of flaw size, inches.
a_c	— Critical half crack length.
a_o	— Initial half crack length.
A	— Area of cross section, square inches; ratio of alternating stress to mean stress; subscript “axial”; A basis for mechanical-property values (see Section 1.4.1.1 or Section 9.1.6); “A” ratio, loading amplitude/mean load; or area.
A_e	— Strain “A” ratio, strain amplitude/mean strain.
A_i	— Model parameter.
AD	— Anderson-Darling test statistic, computed in goodness-of-fit tests for normality or Weibullness.
AISI	— American Iron and Steel Institute.
AMS	— Aerospace Materials Specification (published by Society of Automotive Engineers, Inc.).
Ann	— Annealed.
AN	— Air Force-Navy Aeronautical Standard.
ASTM	— American Society for Testing and Materials.
b	— Width of sections; subscript “bending”.
br	— Subscript “bearing”.
B	— Biaxial ratio (see Equation 1.3.2.(h)); B-basis for mechanical-property values (see Section 1.4.1.1 or Section 9.1.6).
Btu	— British thermal unit(s).
BUS	— Individual or typical bearing ultimate strength.
BYS	— Individual or typical bearing yield strength.
c	— Fixity coefficient for columns; subscript “compression”.
cpm	— Cycles per minute.
C	— Specific heat; Celsius; Constant.
CEM	— Consumable electrode melted.
CRES	— Corrosion resistant steel (stainless steel).
C(T)	— Compact tension.
CYS	— Individual or typical compressive yield strength.
d	— Mathematical operator denoting differential.
D or d	— Diameter, or Durbin Watson statistic; hole or fastener diameter; dimpled hole.
df	— Degrees of freedom.
e	— Elongation in percent, a measure of the ductility of a material based on a tension test; unit deformation or strain; subscript “fatigue or endurance”; the minimum distance from a hole, center to the edge of the sheet; Engineering strain.
e_e	— Elastic strain.
e_p	— Plastic strain.
e/D	— Ratio of edge distance (center of the hole to edge of the sheet) to hole diameter (bearing strength).
E	— Modulus of elasticity in tension or compression; average ratio of stress to strain for stress below proportional limit.

MIL-HDBK-5J APPENDIX A

Appendix A A.0 glossary A.1 abbreviations

MIL-HDBK-5J APPENDIX A