Applicability of effective stress concept to structural design of tubesheets

Kasahara, Naoto*; Takasho, Hideki*; Kawasaki, Nobuchika ; Ando, Masanori 

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. To extend applicable area of equivalent solid plates to inelastic analysis, the general determination method of non-linear equivalent material properties for perforated plates was proposed based on the effective stress ratio (ESR). This study examined applicability of effective stress concept to structural design of plat and spherical tubesheet structures.