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Established with the surface membrane structure finite element analysis theory
An unbalanced force :: {= H Hill 1R} -l even mountain r-+ e · HV (13) l ten v eliminate f; the process is the equilibrium iteration process. To speed up the convergence process , also used the orange Chi factor : O r2) to determine whether the wrinkles of the unit (1 ) If the three points 2> 0 , no wrinkles (2 ) if a point 0, then the unit wrinkles and to the point of the r direction as a unit of one-way direction of tension change the stress-strain relationship matrix c. (4) If 2 or 3 points appear one-way tension state ,
tory burch outlet, if the direction of tension are the same, the direction for the entire unit of the one-way direction of tension if the tension in a different direction but the difference is small,
mac cosmetics wholesale, then averaged for the entire unit , one-way direction of tension if the tension direction of the difference is too large , according to unit failure handling . treated in accordance with the stress state and stress-strain relationship to calculate the tangent matrix c stiffness matrix and the unbalanced force vector . VII Conclusion in this paper, a more reasonable from a mechanical perspective and more accurate curved mask unit to replace the previous flat mask unit widely used theory and detailed derivation of the theoretical formula proposed numerical calculation of specific programs. from the actual count down the results,
mbt shoes ireland, two theories are different, because of space limitations, will in future series of articles discussed in detail in the numerical example and model experiments.
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