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Force.m
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Force.m
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function [f] = Force(nnel,shape,P,ielem,load_elem,loadType)
%--------------------------------------------------------------------------
% Purpose :
% Determines the force vector for the element 'iel'
% Synopsis :
% [f] = Force(nnel,shape,P)
% Variable Description:
% f - element force vector
% nnel - number of nodes per element
% shape - Shape functions for the element
% P - applied transverse pressure
%--------------------------------------------------------------------------
fef = shape*P ; % distributed pressure is converted into nodal forces, ...
...forces is applicable to transverse direction only i.e. related to w only
% Case 0) Uniform Transverse Load
if loadType == 0
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
% Case 1) One Patch load
elseif loadType == 1
if load_elem(ielem) == 1
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
else
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = 0 ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
end
% Case 2) Two Patch loads
elseif loadType == 2
if load_elem(ielem) == 1
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
elseif load_elem(ielem) == 2
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
else
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = 0 ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
end
% Case 3) Three Patch Loads
elseif loadType == 3
if load_elem(ielem) == 1
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
elseif load_elem(ielem) == 2
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
elseif load_elem(ielem) == 3
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
else
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = 0 ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
end
% Case 4) Four Patch Loads
elseif loadType == 4
if load_elem(ielem) == 1
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
elseif load_elem(ielem) == 2
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
elseif load_elem(ielem) == 3
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
elseif load_elem(ielem) == 4
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = fef(1) ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
else
for i = 1:nnel
i1=(i-1)*3+1;
i2=i1+1;
i3=i2+1;
f(i1,1) = 0 ;
f(i2,1) = 0 ;
f(i3,1) = 0 ;
end
end
end
end