Example 207
!  TWO-DIMENSIONAL TRUSS, DIRECT ENERGY METHOD
!  N_G_DOF = 2, NOD_PER_EL = 2, N_SPACE = 2, N_LP_FLO = 7      5
!  ELEMENT REAL PROPERTIES: 
!  (1) = AREA,      (2) = MODULUS OF ELASTICITY,
!  (3) = TEMP RISE, (4) = COEF THERMAL EXPANSION,
!  (5) = WEIGHT DENSITY
      
DATA SET 1
     2       4        5    Meek's Example 7.2 truss
     *--(10)-*--(11)-*     E = 30,000 ksi,  A = 1 in^2
     |\(4)  /|\(7)  /|     Two 10 inch bays
     |  \ /  |  \ /  |     Max vertical deflection @ 3
   (3)   X  (6)  X  (9)    is -4.4013E-03 inches
     |  / \  |  / \  |
     |/(5)  \|/(8)  \|     Reactions are 5K each at 1, 6
   1 #--(1)--*--(2)--o 6
   Pin      3|       Roller
             v P=10K

DATA SET 2
 Logan Example 15.1, Fixed bar with temperature rise
   1        2       3
    *--(1)--*--(2)--*     E = 30,000 ksi,  A = 4 in^2
  L = 4 ft = 48 inches, alpha = 7e-6, rise = 50 F
  Reactions are 42,000 lb, stress = 10,500 psi
  End points 1 & 3 fixed, solution is null

DATA SET 3
 Logan Example 15.3, 2-D Truss with temperature rise
 occuring in bar (1) only
   1 o  Y_Roller        E = 30,000 ksi,  A = 2 in^2
     | \                8 ft high, 6 ft wide (96 by 72)
    (1) (2)             alpha = 7e-6, rise = 75 F
     |     \            Y_1 = 0.0333 inch
   2 *       * 3     Stress: -5,333, + 6,666 psi
   Pin       Pin

DATA SET 4 
 Logan Example 3.9, 2-D Truss with inclined support
   2,X_Roller  3,Roller_at_45
  P->o--(2)--o    E = 210 GPA, A_1 = A_2 = 6e-4 m^2
     |      /     A_3 = 8.485 m^2, 1 m high, 1 m wide 
    (1)  (3)      P = 1e3 kN, alpha = 0, rise = 0   
     |  /         DX_2 = 11.9e-3 m. F_1_Y = -500 kN
   1 */      Note: (1) is a zero force member
   Pin 

DATA SET 5
Elastic linear bar patch test