... three elbows and is subjected to quasi-static end-displacement excitation. Global deformation and local strain measurements are obtained, indicating significant strain ratcheting at critical locations of the elbows. The piping system failed under low-cycle fatigue undergoing through-thickness cracking...

...R. Karimi; M. Shariati This paper investigates ratcheting behavior of SS316 L thin-walled steel pipes subjected to cyclic internal pressure experimentally and numerically. Numerical simulations were performed using abaqus software, and nonlinear isotropic/kinematic hardening model. According...

... which is very adjacent to limit load boundary regardless the changes in geometry so that the shakedown limit boundary should replace the ratchet limit boundary. Therefore, allowable loading should be selected by maintaining enough margins below the elastic shakedown limit boundary. With decreasing...

.... This incremental plastic deformation called ratcheting may lead to failure of the piping systems. There is no numerical method available to evaluate this accumulated strain in the piping system using response spectrum as input. In the literature, incremental hinge technique is available to predict the failure...

...S. Vishnuvardhan; G. Raghava; P. Gandhi; M. Saravanan; D. M. Pukazhendhi; Sumit Goyal; Suneel K. Gupta; Vivek Bhasin; K. K. Vaze “Ratcheting” is a phenomenon which leads to reduction in fatigue life of a structural component by loss of ductility due to cycle by cycle accumulation of plastic strain...

...R. Adibi-Asl; W. Reinhardt A simple and systematic procedure is proposed for shakedown analysis using a combination of linear and nonlinear finite element analysis (FEA). The method can identify the boundary between the shakedown and ratcheting domains directly and does not require a cyclic...

... are applied to the same type of specimen. In the second test series, pressurized HDPE piping was subject to oscillating bending stresses. Ratcheting of the hoop strains in the pipe occurs. Results show that these strains follow the constitutive relationships of linear viscoelasticity and experimental results...