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// relaxed.fe
// Test of relaxed_elastic energy
space_dimension 5 // 2 extra for unstrained reference coordinates
quantity stretchy energy method relaxed_elastic global
quantity stretchy1 info_only method relaxed_elastic1 global
quantity stretchy2 info_only method relaxed_elastic2 global
define facet attribute poisson_ratio real
define vertex attribute ref_coord real[2]
constraint 1 formula: x4 = ref_coord[1]
constraint 2 formula: x5 = ref_coord[2]
vertices
1 0 0 0 0 0 constraint 1,2 ref_coord 0 0
2 1 0 0 1 0 constraint 1,2 ref_coord 1 0
3 0 1 0 1 1 constraint 1,2 ref_coord 0 1
edges
1 1 2
2 2 3
3 3 1
faces
1 1 2 3
read
set facet poisson_ratio 0.8
set facet tension 0.0
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