Reinforced plastic symmetrical

These values, for example, might correspond to a roving-reinforced panel employing an intermediate TS polyester plastic. When the orthotropic material is balanced, the longitudinal and transverse properties are the same, that is, Ei= Ej and Vu- = Vji. The properties are symmetrical about the 45° angle, as shown in Figure 8.25 in which the following values were used ... 

The criterion for solving the problem of the plastic design of two-way reinforced cap is the minimum redistribution criterion . In the case of a fixed ended circular cap subjected to a symmetrical pressure load, the most stressed points are its centre and the unit elastic radial and annular moments are maxima. Let... 

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