英语翻译Note that the stress distribution is strongly influenced

英语翻译
Note that the stress distribution is strongly influenced by the application of boundary conditions at both ends of the
canoe.However,the accurate prediction of the stresses in these areas would have required a much more detailed finite element model than the one used here and probably different element formulations.That is the reason why these stress distributions have not been discussed here.However,experimental work was performed to estimate the value of the stresses in the support areas and the results of this study are presented in Section 6.2.
The ribs play a vital role in stiffening the canoe transversally.The fourth rib located 2 m from the stern (see Fig.2),location where the canoe’s cross-sectional area changes suddenly,sustains the higher stress value (2.5 MPa).Due to their high modulus of elasticity and relative size,the ribs considerably reduce the opening of the canoe.Also,the ribs stiffness is such that zones are created between each of them.Each zone is delimited by two ribs in the longitudinal direction.To illustrate this aspect,the minimal principal stress calculated on the inner surface of the canoe is plotted in Fig.8.The color of the arrows shown in this figure indicates the magnitude of the stress whereas its orientation corresponds to the direction of the minimum principal stress.Recall that the minimum principal stress is the lowest normal stress that prevails at a point.Although not shown in Fig.8,one can easily imagine the direction of the maximum principal stress,which is perpendicular to the arrows shown in this figure.The analysis of the maximum value of the minimum principal stress reveals that between rib #1 and #2 the maximum principal stress is in the longitudinal direction.On the other hand,between rib #3 and #4 as well as between rib #4 and the stern,the maximum principal stress is in the transversal direction.