MIL-HDBK-17-3F Volume 3.Chapter 1 General Information value of parameter at time t X,y,Z general coordinate system Σ total.or summation 0 initial or reference datum () format for indicating specific,temperature associated with term in parentheses.RT-room temperature(21C,70F);all other temperatures in F unless specified. 1.3.1.4 Superscripts The following superscript notations are considered standard in MIL-HDBK-17. b -bending br -bearing -(1)compression -(2)creep cc compressive crippling cr -compressive buckling e -elastic filament g glass scrim cloth IS interlaminar shear (i) -ith ply or lamina lim -limit,used to indicate limit loading m matrix ohc -open hole compression oht -open hole tension 0 -plastic pl -proportional limit rup rupture -shear scr -shear buckling sec -secant(modulus) SO offset shear T temperature or thermal t tension tan tangent(modulus) ultimate -yield -secondary(modulus),or denotes properties of H/C core when used with subscript c CAI compression after impact 1.3.1.5 Acronyms The following acronyms are used in MIL-HDBK-17. AA -atomic absorption AES Auger electron spectroscopy AIA -Aerospace Industries Association ANOVA analysis of variance ARL -US Army Research Laboratory ASTM -American Society for Testing and Materials BMI bismaleimide BVID -barely visible impact damage CAI compression after impact CCA composite cylinder assemblage CFRP carbon fiber reinforced plastic 1-10MIL-HDBK-17-3F Volume 3, Chapter 1 General Information 1-10 t - value of parameter at time t x, y, z - general coordinate system ∑ - total, or summation o - initial or reference datum ( ) - format for indicating specific, temperature associated with term in parentheses. RT - room temperature (21°C,70°F); all other temperatures in °F unless specified. 1.3.1.4 Superscripts The following superscript notations are considered standard in MIL-HDBK-17. b - bending br - bearing c - (1) compression - (2) creep cc - compressive crippling cr - compressive buckling e - elastic f - filament g - glass scrim cloth is - interlaminar shear (i) - ith ply or lamina lim - limit, used to indicate limit loading m - matrix ohc - open hole compression oht - open hole tension p - plastic pl - proportional limit rup - rupture s - shear scr - shear buckling sec - secant (modulus) so - offset shear T - temperature or thermal t - tension tan - tangent (modulus) u - ultimate y - yield ' - secondary (modulus), or denotes properties of H/C core when used with subscript c CAI - compression after impact 1.3.1.5 Acronyms The following acronyms are used in MIL-HDBK-17. AA - atomic absorption AES - Auger electron spectroscopy AIA - Aerospace Industries Association ANOVA - analysis of variance ARL - US Army Research Laboratory ASTM - American Society for Testing and Materials BMI - bismaleimide BVID - barely visible impact damage CAI - compression after impact CCA - composite cylinder assemblage CFRP - carbon fiber reinforced plastic