Unified Constitutive Modeling towards Enhanced Structural Integrity

Tasnim Hassan; Raasheduddin Ahmed; Paul R. Barrett; Nazrul Islam; Machel L. Morrison

doi:10.4028/www.scientific.net/AMM.853.127

Paper Titles

Experimental Studies on Deformation Behaviors of Rubbery Materials under Cyclic Loading
p.106

Ratcheting Simulation of Z2CN18.10 Austenitic Stainless Steel under Pre-Strain Conditions
p.112

A Novel Unified Dislocation-Density Based Model for Hot Deformation Behavior of a Nickel-Based Superalloy
p.117

Research on High Temperature Compression and Creep Properties of Porous Copper Alloy
p.122

Unified Constitutive Modeling towards Enhanced Structural Integrity
p.127

Cohesive Zone Modeling for 3D Ductile Crack Propagation
p.132

A Comparative Study on the Cyclic Behavior of Austenite/Ferrite Phases Characterized by the Nanoindentation
p.137

Three Dimensional Criterion for Creep Crack Propagation in C(T) Specimen
p.142

Long Time High Temperature Stress Rupture Strength Behavior and Structure Stability Study on Ni-Base Superalloy Nimonic 80A
p.148

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 853Unified Constitutive Modeling towards Enhanced...

Unified Constitutive Modeling towards Enhanced Structural Integrity

Abstract:

Design and analysis of critical components in energy (nuclear, solar and fossil power), aerospace, automobile and chemical industries based on detailed inelastic analysis can enhance structural integrity and thereby economy. Especially for the components exposed to very high temperature thermomechanical fatigue loading, unified inelastic analysis based life prediction may enhance accuracy. A unified constitutive model (UCM) with features of strain rate-dependence, static recovery, mean-stress evolution, strain range-dependence, and finally creep damage is developed. The modified UCM is validated against simulating a broad set of strain-controlled isothermal and anisothermal fatigue and fatigue-creep responses, and stress-controlled creep responses of Haynes 230. Some of these results are presented to demonstrate improved simulations by the modified UCM. Importance of damage parameters in improving simulations in the tertiary creep regime is observed.

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Periodical:

Applied Mechanics and Materials (Volume 853)

Pages:

127-131

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.853.127

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Online since:

September 2016

Authors:

Tasnim Hassan*, Raasheduddin Ahmed, Paul R. Barrett, Nazrul Islam, Machel L. Morrison

Keywords:

Creep, Creep-Fatigue, Low-Cycle Fatigue, Relaxation, Unified Constitutive Model

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