Mathematical Problems in Engineering / 2015 / Article / Tab 4

Research Article

Improved Genetic Algorithm with Two-Level Approximation Method for Laminate Stacking Sequence Optimization by Considering Engineering Requirements

Table 4

Practical optima of composite panels.

Laminate 
Ex: exterior part 
In: interior part
PliesWeight, kg (B/A)Critical buckling factor (B/A)

Case 0/45/−45/0/−45/45/0/45/−45/0/−452s (Ex)—240.8258/0.82580.76/0/76
90/45/902s(In)—08

Case 0/45/0/45/−45/0/−45/0/−45/0/−45/45s (Ex)—240.8343/0.82580.73/0.72
−45/90/−45/90s(In)—08

Case 02/45/−45/0/45/−45/02/45/−45/0s (Ex)—240.8258/0.82580.74/0.74
90/45/−45/90s(In)—08

Case 0/45/−45/0/45/−45/02/45/−45/0/45s (Ex)—240.8774/0.87740.77/0.77
−45/90/−45/45/90s(In)—10

Case 0/−45/0/45/−45/0/45/−45/0/−45/0/−45s(Ex)—240.8774/0.87740.78/0.78
−45/45/90/−45/90s(In)—10

Reference [26](−45/45)2/45/0/−45/05s (Ex)—240.8258
90/−45/45/90s(In)—08

A: after rounding, B: before rounding; #: critical buckling factor in reference, and ##: value given by Nastran.

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