/*
                                                                              
                    O+++++++++++++++++++++++++++++++++++++++O                 
                  ++ ++                                      +                
                 +     +                                      +               
               ++       +                                      +              
              +          ++                                    +O             
             +             +                                 ++  +            
           ++               ++                            +++     ++          
          +                   +                         ++          +         
        ++                     ++                     ++             +        
       +                         +                 +++                ++      
     ++                           +              ++                     +     
    +                              ++         +++                        +    
   +                                 +      ++                            ++  
 ++                                   ++  ++                                + 
O+++++++++++++++++++++++++++++++++++++++O+                                   O

*/

problem description
title="Logan Sample Problem 6-25-1 p. 260" nodes=6 elements=7

nodes
1  x=0 y=0 z=0 constraint=pin
2  x=10 y=15 z=0 constraint=free force=seat
3  x=20 y=0 z=0
4  x=30 y=15 z=0 force=handlebars
5  x=32 y=11.25 z=0
6  x=38 y=0 z=0 constraint=roller

beam elements
1  nodes=[1,2]   material=steel_1    
2  nodes=[2,3]   material=steel_2345    
3  nodes=[1,3]   
4  nodes=[2,4]   
5  nodes=[3,5]   
6  nodes=[4,5]   material=steel_678    
7  nodes=[5,6]   

material properties
steel_1  E=3e+07 A=0.1 Ix=0.01 Iy=0 Iz=0 J=0 G=0 nu=0 t=0 rho=0.1*3.4/12 kappa=0
steel_2345  E=3e+07 A=0.15 Ix=0.02 Iy=0 Iz=0 J=0 G=0 nu=0 t=0 rho=0.15*3.4/12 kappa=0
steel_678  E=3e+07 A=0.3 Ix=0.1 Iy=0 Iz=0 J=0 G=0 nu=0 t=0 rho=0.3*3.4/12 kappa=0

constraints
pin  tx=c ty=c tz=u rx=u ry=u rz=u
free  tx=u ty=u tz=u rx=u ry=u rz=u
roller  tx=u ty=c tz=u rx=u ry=u rz=u

forces
seat  Fx=0 Fy=-125 Fz=0 Mx=0 My=0 Mz=0
handlebars  Fx=0 Fy=-25 Fz=0 Mx=0 My=0 Mz=0

end