Effective stress of triangular pattern perforated plates

Kasahara, Naoto; Takasho, Hideki*

For design analysis of perforated plates, axi-symmetric models with equivalent solid plates are conventionally adopted to simplify perforated geometries. ASME Sec.III Appendix A-8000 provides elastic constants for equivalent solid plates. However, no design codes give inelastic material properties of equivalent plates. This study reveals that perforated plates have their own effective stress ratio (ESR), which is a function of geometry and is independent from their materials. ESR enables the general determination method of non-linear equivalent material properties for perforated plates.