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Figure 47: Stress Distribution ofthe AUV Propeller
In Figure 47, the areas near the hub have the higher stress, and these areas are needed to
be seriously considered to make sure the propeller is strong enough. Stress on the
propeller will ultimately cause deflections, which is also important when considering a
propeller's acceptability. High deflection on a propeller will change the flow around the
propeller and loads on it. Low deflection is desirable for a propeller design.
CosmosWorks can output the displacements related to the stresses generated by the
fluidlblade interaction. Deflections were briefly reviewed and seen to be minimal but the
simulation values for stress and deflection should be studied in more detail in a further
study. The analytical results should be validated through experimental work, which has
been recommended in the conclusions of this thesis. Figure 48 displays the deflection of
the AUV propeller.
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