A correlation study of methods of matrix structural analysis by Richard H Gallagher; Rattinger Ivan.; John S Archer; North

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By Richard H Gallagher; Rattinger Ivan.; John S Archer; North Atlantic Treaty Organization. Advisory Group for Aeronautical Research and Development. Structures and Materials Panel

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Extra info for A correlation study of methods of matrix structural analysis : report to the 14th Meeting, Paris, France, July 6, 1962

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0^0" sheet. > o Γ3 q Π^ ' UÜ U) J1 r > > d Ω H H H > o 1/3 W H M O ö Model material - 606I-T6 Aluminum. 040" sheet. For internal structure across 1" support width, see details of Model 2 (Figure II). SECTION A-A 53 Fig. 13. Model 5—Geometry and details. 00 in. 50 in. wide flanges. The central spar of each wing consisted of two such channels, placed back-to-back; all other internal members were single channels. 063 in. thick. 125 in. thick. The skins and internal members were riveted together. 75 x 106 psi, μ = 1/3 2.

0 M S CD 03 1 1 h il h η H n η Γ Ί LJ—il r-'g t I Oi CO «Sog q VJ1 Γ 1 o Γ3 ^ °ϋ © - Ê- i CES: Model m a t e r i a l -6θ6ΐ-τ6 Aluminum. OUO" sheet. 07" Γ Fig. 11. Model 3—Geometry and details. PLANFOBM li jS^Wide Support (Full Span) NOTES: s I to o o 1-3 SI°s In ] _L Γ Ί P s* a> H . Ci ! ΗΗη Π ,„l Ffi H· CD H* O ω ? o V2 T~ o ±_|pL-Ji T~ o Model material - 6θ6ΐ-τ6 Aluminum. All internal members formed of 0 . 0 W sheet. O O IM UJ „. q ill s *. o M O H H C/J 2 o w » H c C/i Y-Y Axis JU. tu μ 1 j | π rr - jn U I ai ■ί1 û !

29 M E T H O D S OF MATRIX S T R U C T U R A L ANALYSIS Reference 22 has shown that an alternative relationship for deriving an element stiffness coefficient is : d2U *« = *n* w When formalized as a sequence of operations leading to the complete stiffness matrix, Eq. (42) will have the form of Eq. (34c). The illustrative example of the present section will not be pursued to the development of a single explicit stiffness matrix, due to the complexity of inverting the [B] matrix. Rather, it is presented as the product of the matrices shown in Fig.

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