Finite Element Simulation of Creep Deformation for Gr. 91 Steel at 600 °C Using Garofalo Model

The present paper provides predictive creep deformation model for Gr. 91 steel at 600 °C. To cover primary-secondary creep regions, two types of creep models, i.e. Garofalo’s and RCC-MRx models were considered in the present study, where the parameters of Garofalo’s model were characterized based on experiment results, and the parameters of RCC-MRx model were determined by the values given in the RCC-MRx code. Furthermore, each creep model were developed based on CREEP (user creep subroutine invoked in ABAQUS) codes for applying to finite element (FE) simulations using commercial code. Then, FE analyses for creep deformation were performed by using the developed CREEP codes (for Garofalo’s and RCC-MRx models), and the results were compared with experiment data. As results, Garofalo’s model provides more accurate results than RCC-MRx model.

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Effects of Creep Deformation Model of Gr. 91 Steel at 600°C on Creep Fracture Mechanics Parameters

Volume 6A: Materials and Fabrication ◽

10.1115/pvp2017-65689 ◽

2017 ◽

Cited By ~ 1

Author(s):

Min-Gu Won ◽

Nam-Su Huh ◽

Hyeong-Yeon Lee ◽

Woo-Gon Kim ◽

Jae-Boong Choi

Keyword(s):

Finite Element ◽

Fracture Mechanics ◽

Creep Deformation ◽

Creep Model ◽

Deformation Model ◽

Secondary Creep ◽

Creep Fracture ◽

Reference Stress ◽

Creep Region ◽

Omega Model

The present paper investigates the effect of creep deformation model of Gr. 91 Steel at 600 °C on creep fracture mechanics parameters. Three types of creep deformation model were considered, i.e. Garofalo’s model and RCC-MRx model for primary-secondary creep region, and modified omega model for primary-secondary-tertiary creep region. The parameters for each creep deformation model were characterized from experiment results. Reference Stress (RS) method was used to estimate creep fracture mechanics parameters, C(t)-integral and COD rate for each creep model. Furthermore, elastic-creep finite element (FE) analyses were carried out to verify the results of RS method. Finally, the effect of creep deformation model was investigated by comparing the results of C(t)-integral and COD rate.

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Finite Element Simulation for Creep Response of Strengthened Wood/PVC Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.747.261 ◽

2013 ◽

Vol 747 ◽

pp. 261-264 ◽

Cited By ~ 1

Author(s):

T. Pulngern ◽

K. Preecha ◽

Narongrit Sombatsompop ◽

V. Rosarpitak

Keyword(s):

Finite Element ◽

Finite Element Simulation ◽

Power Law ◽

High Carbon Steel ◽

Creep Model ◽

Element Analysis ◽

Creep Response ◽

Element Simulation ◽

Before And After ◽

Power Law Creep

This paper investigates the finite element simulation to predict the creep response of Wood/PVC (WPVC) composite members before and after strengthening by using high carbon steel (HCS) flat bar strip adhered to the tension side. The creep parameters based on power law models of WPVC composites and the HCS flat bars were determined experimentally. Then, the nonlinear finite element analysis (FEA) software of ABAQUS was applied to predict the creep behaviors of composite members using the obtained experimentally creep parameters of individual component of WPVC composites and HCS flat bars. Good correlation between finite element simulation and experimental results are obtained for all cases. ABAQUS software with power law creep model show good potential for prediction the creep response of WPVC composites before and after strengthening.

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Leveraging the Strengths of Commercial Finite Element Modeling Codes and Custom Engineered Software to Solve Atypical Rotordynamic Problems

Volume 5: Structures and Dynamics, Parts A and B ◽

10.1115/gt2008-50363 ◽

2008 ◽

Cited By ~ 1

Author(s):

David Ransom

Keyword(s):

Finite Element ◽

Finite Element Modeling ◽

Finite Element Simulation ◽

Three Dimensional ◽

Problem Solution ◽

Element Modeling ◽

Element Simulation ◽

Commercial Code ◽

The Many ◽

User Friendly

Commercial finite element modeling codes have evolved over the past few decades into very user friendly environments, easily handling the many complications of finite element simulation. The significant steps of model generation (preprocessing), problem solution (analysis) and results viewing (post-processing) are easily handled for most of the typical finite element problems. However, there are still occasions when the necessary solution requirements fall outside the capabilities of any single finite element code. In this case, it is beneficial to the engineer to use some of the features of the commercial code, filing in the gaps with custom engineered software. This is especially true for the field of rotordynamics. In this paper, several of the complications involved in the finite element simulation of rotordynamics are discussed, and methods for leveraging the strengths of both commercial and custom engineered software are provided. The objective is to assist the practical engineer in the simulation of more complicated rotordynamic systems, including transient non-linear systems and three-dimensional coupled rotor-structure interaction systems.

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