Modares Mechanical Engineering

Modares Mechanical Engineering

Numerical simulation of a composite Rupture disc by considering the nonlinear strain path

Document Type : Original Research

Authors
Morteza Mohebbi
Valiollah Panahizadeh
Mohammad Hoseinpour
Shahid Rajaee Teacher Training University, Lavizan, Tehran, Iran
Abstract
Cold work hardening and nonlinear strain path, cause the failure strain change. Therefore, it is necessary to consider the created cold-work hardening and its distribution for predicting and simulating the behavior of products. The composite rupture disc cold-work hardened during manufacturing and burst and release pressure in a pressure commensurate with this hardening. In this case, the sheet metal undergoes a nonlinear strain path during forming and after slotting during the burst test. In this paper, the burst pressure of a composite Rupture disc estimated by using finite element simulation in Abaqus-implicit and explicit and by considering the strain hardening during bulge forming before the slotting process. The burst pressure is estimated according to the maximum plastic failure strain that changed due to nonlinear strain path and work hardening. The burst pressure predictions were compared and validated by experimental tests. In this paper, the effect slotting pattern, investigated by using FEM simulations and experiments. In the prepared samples for this paper, by slotting after bulge forming, the burst pressure reduces more than 80%. The simulation with this method predicts this pressure reduction with an error of about 3%.
Keywords
Nonlinear strain path
Composite Rupture disc
Finite Element Method (FEM)
Predicting burst pressure

Subjects

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Modares Mechanical Engineering
Volume 21, Issue 7
July 2021
Pages 469-478