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STRESS ANALYSIS

Analysis of torsional stresses in airplane wings, by A- Kartveli and E. Chagnaird. Aviation engineering, East Stroudsburg,

Pa., June 1929, v. 11, no. 6, p. 7-14, 20. diagrs.

The Allowable stress in tubes subjected to torsion. Washington, U.S. Govt. print. off., 1929.    5 p. diagrs. (Air corps In

formation circular no. 641)

Sonie aspects of torsion in multispar eantilever wings. Washington, TJ.S. Govt. print. off., 1929.    8 p. illus. (Air corps In

formation circular no. 627)

Torsional rigidity of cantilever wings with constant spar and rib sections, by Giuseppe Gabrieli!. Washington, 1929.    39 p.

diagrs. (N.A.CoA. Technical memoranduras no. 520) (From Luftfahrtforschung, MUnchen und Berlin, June 26, 1928 and L*Aerotecnica, Pisa, 1928, v. 8, no. 1, p. 3-46)

The Torsional strength of wings, by C. P. Burgess. Washington,

U.S. Govt. print. off., 1929.    13 p. diagrs., tables.

(N.A.CoA. Report no. 329)

Application of usual formulas for torsional stress to non-circular beams, by J.L. Bates and W.B. Newton. Marinę engineering,

New York, July 1928, v. 33, p. 397. diagrso

4

Optical determination of axial stresses in long rectangular plates under torsion, by I.A. Balinkin. Physical review, New York, Oct. 1927, v. 30, p. 520-26.

La Flesso-torsione, di C. Passaąuindici. Industria, Milano, Apr. 15, 1927, v. 41, no. 7, p. 172-79. diagrso

Contribution a l^fetude de la torsion des pieces droites prisma-tiques,^par E. Gysen. Bulletin techniąue de l^fAssociation des ingenieurs sortis de l^TlScole poły techniąue de Bruxe.lles, 1926-1927, v. 22-23, no. 2; 1, p. 68-75; 3-12.

Die Ermittlung der drehspannungen in geraden zylindrischen stciben, von H. Sellentin. Z.A.M.M., Berlin, Apr. 1926, v. 6, no. 2, p. 159-73. diagrs.

Der Durchlaufende balken auf torsionsfesten unterzUgen, von H. Cramer. Der Bauingenitur, Berlin, Nov. 27, 1925, v. 6, no. 34, p. 954-58. illus.

Torsion of hollow oval prisms, by M.S. Ah:ned. Philosophical maga-zine, London, Nov. 1925, ser. 50, p. 1033-48.

Beanspruehung eines tragers auf biegung und verdrehen, von L.

Foppl. Der Bauingenieur, Berlin, June 25, 1925, v. 6, no. 12, p. 455-63. illus.