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Fig. 7. (A) Franc2d anterior model, a 2-D model of the x–y
plane of the 3-D experiments. Grey outline of deformed mesh is shown with
maximum displacement (
max) and half-length of crack
(a) indicated. Scale bar, 1 mm; magnification factor, 1. (B) Change
in maximum displacement in the anterior model as the crack is extended
a at each tip. The dotted line at 0.0047 m indicates the
measured distance from the worm's body to the lateral edge of the crack (data
not shown).