Test 1.2 Flat Truss

Verification of the LIRA-SAPR software / Test 1.2 Flat Truss / Analytical solution: M. Laredo, Résistance des matériaux, Paris, Dunod, 1970, p. 579.



Analytical solution: M. Laredo, Résistance des matériaux, Paris, Dunod, 1970, p. 579.

Geometry:

Q=300; А1=1.41 x 10-3 м2; А2=2.82 x 10-3 м2.

Material characteristics: Isotropic elastic, Е=2.1 х 1011 Pa, coefficient of thermal expansion α = 10-5 С-1.

Boundary conditions: uA=vA = 0; vB = vl c = 0.

Loads:

vA = -0.02 м; vВ = -0.03 м; v = -0.015 м.
FE = -150 кН; FF = -100кН.
All rods are heated to temperature 1500С.

CALCULATION RESULTS:

Point

The desired value

Analytic solution

Calculation results (LYRA)

Infelicity,%

BD

Longitudinal force, Н

43633

43633

0

D

                                                 Relocation

vD, м

-0,01618

-0,01618

0

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