MT-1620 al.2002 This gives 21 independent (at most) engineering constants Total 3 En 6vnm 3 Gm 18n nm Indp't. 3 21 Now that we have defined the terms we wish to write the engineering stress-strain equations Recall compliances inp pq and consider only the first equation 11110511+511022+3113033 +2S123023+2 113013+2S 1112012 (we'lI have to use contracted notation, so.) E1=S101+S1202+S133+S1404+S1505+S1606 (Note: 2's disappear!) Paul A Lagace @2001 it 5-p. 9MIT - 16.20 Fall, 2002 This gives 21 independent (at most) engineering constants: Total 3 En 6νnm 3 Gm 18ηnm 6 ηnm ↓ ↓ ↓ ↓ ↓ Indp’t.: 3 3 3 9 3 = 21 --> Now that we have defined the terms, we wish to write the “engineering stress-strain equations” Recall compliances: εmn = Smnpq σpq and consider only the first equation: ε11 = S1111 σ11 + 2S1123 ε1 = S11 σ1 + Paul A. Lagace © 2001 + S1122 σ22 + S1133 σ33 σ23 + 2S1113 σ13 + 2S1112 σ12 (we’ll have to use contracted notation, so…) S12 σ2 + S13 σ3 + S14 σ4 + S15 σ5 + S16 σ6 (Note: 2’s disappear!) Unit 5 - p. 9