/*

                    O                                      +O                 
                  ++ ++                                  ++  +                
                 +     +                               ++     +               
               ++       +                            ++        +              
              +          ++                       +++          +O             
             +             +                    ++           ++  +            
           ++               +                 ++          +++     ++          
          +                  ++            +++          ++          +         
        ++                     +         ++           ++             +        
       +                        +      ++          +++                ++      
     ++                          ++  ++          ++                     +     
    +                              O+         +++                        +    
   +                                ++      ++                            ++  
 ++                                   ++  ++                                + 
O+++++++++++++++++++++++++++++++++++++++O+                                   O

*/

problem description
title="Logan Sample Problem 6-25-2 p.260" nodes=7 elements=8

nodes
1  x=0 y=0 z=0 constraint=pin
2  x=10 y=15 z=0 constraint=free force=seat
3  x=17.333 y=4 z=0
4  x=20 y=0 z=0
5  x=30 y=15 z=0 force=handlebars
6  x=32 y=11.25 z=0
7  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=[1,4]   
4  nodes=[3,5]   
5  nodes=[4,6]   
6  nodes=[5,6]   material=steel_678    
7  nodes=[6,7]   
8  nodes=[3,4]   

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 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 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 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
