公开(公告)号：US08433549B2

公开(公告)日：2013-04-30

申请号：US12502951

申请日：2009-07-14

申请人： Thomas Güll ,  Stephan Fell ,  Valentin Schultheis

发明人： Thomas Güll ,  Stephan Fell ,  Valentin Schultheis

IPC分类号： G06G7/48

CPC分类号： G06F17/5018 ,  G06F17/5095 ,  G06F2217/42

摘要： A method for calculating multi-directional composites in FEM simulations for designing a high pressure tank. The method starts by reading data for the simulation including fiber orientation and composite material properties. Then, for every FEM element, the method calculates the stiffness of directional plies and converts the calculated stiffness into a local coordinate system for each ply. The method then calculates the stiffness of packets of fiber orientations as a layer set-up. The method then calculates engineering constants for the layer set-up and the equivalents for the stress limit for the layer set-up. The method then uses the engineering constants to calculate the stresses on the FEM elements and determines whether the calculated stress is above a predetermined stress limit for each element. If the calculated stress is above the stress limit, then the algorithm switches to a complex calculation of stress that calculates the stress for each ply.

摘要翻译： 一种用于设计高压罐的有限元模拟中多向复合材料的计算方法。 该方法从阅读数据开始，包括纤维取向和复合材料性质。 然后，对于每个FEM元素，该方法计算方向层的刚度，并将计算的刚度转换为每个层的局部坐标系。 然后，该方法计算纤维取向的包的刚度作为层设置。 然后，该方法计算层设置的工程常数和层设置的应力限制的等效值。 然后，该方法使用工程常数来计算FEM元件上的应力，并确定计算的应力是否高于每个元件的预定应力极限。 如果计算出的应力超过应力极限，则算法切换到计算每个层的应力的应力的复杂计算。