study on cyclic constitutive model and ultra low cycle
Study on cyclic constitutive model and ultra low cycle fracture prediction model of duplex stainless steel X. Chang , L. Yang , L. Zong , Menghan Zhao , F. Yin Materials Science
Jun 11, 2020 · The ultra-low cycle fatigue is generally characterized by very few load reversals (typically less than 100, i.e. N f < 100) that cause large local plastic strains leading to the ductile fracture initiation. A Unified Viscoplastic Model for High Temperature Low Jan 07, 2014 · The material model is successfully applied to the characterisation of the high temperature low cycle fatigue behavior of a service-aged P91 material, including isotropic (cyclic) softening and nonlinear kinematic hardening effects, across a range of temperatures and strain-rates.
An energy-based model, which considers the effects of both stress triaxiality and cyclic loading on the critical fracture strain energy, is proposed. Coupled with the new model, finite element analyses of the round notched specimens can predict the equivalent plastic strain and the number of fatigue cycles to fracture within a scatter band of 1.5. Constitutive Modelling for Plastic Monotonic and Cyclic Jun 16, 2018 · Coffin, L. F. (1954). A study of the effects of cyclic thermal stresses on a ductile metal. Martinez, X., Oller, S., Barbu, L. G., Barbat, A. H., & de Jesus, A. M. P. (2015). Analysis of ultra low cycle fatigue problems with the Barcelona plastic damage model and a new isotropic hardening law. Constitutive model for cyclic response of
Experiments of 17 high strength aluminum alloy (7A04) specimens were conducted to investigate the constitutive relationship under cyclic loading. The monotonic behavior and hysteretic behavior were focused on and the fracture surface was observed by scanning electron microscope (SEM) to investigate the microfailure modes. Based on Ramberg-Osgood model, stress-strain skeleton curves under Experimental Study of Composite Members in Spatial Grid Jan 22, 2020 · Gui-bo et al. [11, 12] conducted an experimental study on the spatial hysteresis performance of circular steel tubes and developed a material constitutive model that considered damage accumulation. The researchers applied the material damage model to
Feb 18, 2021 · Hysteretic Constitutive Model. The cyclic constitutive model is composed of cyclic skeleton curve and hysteresis criterion (Shi et al. 2011). Among them, the reloading criterion is shown in Fig. 19. The slope of the reloading curve is between the unloading stiffness E s at the starting point A and the secant stiffness E k at the ending point B. Improvement of Cyclic Void Growth Model for Ultra-Low Abstract:The cyclic void growth model (CVGM) is a micro-mechanical fracture model that has been used to assess ultra-low cycle fatigue (ULCF) of steel structures in recent years. However, owing to the stress triaxiality range and contingency of experimental results, low goodness of t is
The cyclic void growth model (CVGM) is a micro-mechanical fracture model that has been used to assess ultra-low cycle fatigue (ULCF) of steel structures in recent years. However, owing to the stress triaxiality range and contingency of experimental results, low goodness of fit is sometimes obtained when calibrating the model damage degradation parameter, resulting in poor prediction. Large scale validation of a new isotropic hardening law The results of the numerical analyses will be compared to experimental ones. The constitutive model used for the simulation of Ultra Low Cycle Fatigue (ULCF) loading and the hardeningsoftening law used are only briefly touched upon. Special emphasis is put on the correlation between the failure mode and the internal pressure applied.
Stanford Libraries' official online search tool for books, media, journals, databases, government documents and more. Liang Zong - Google ScholarStudy on cyclic constitutive model and ultra low cycle fracture prediction model of duplex stainless steel X Chang, L Yang, L Zong, MH Zhao, F Yin Journal of Constructional Steel Research 152, 105-116 ,
Nov 19, 2015 · Low-cycle fatigue (LCF) and strain ratcheting responses of long and short radius elbows are studied experimentally and analytically. Elbow piping components are widely used in piping systems, however, the prediction of their low-cycle fatigue and ratcheting responses remain a challenge. Mechanical Characterization and Modeling of Cyclic The objective of this work is to study the stress-strain responses of ultra high molecular weight polyethylene (UHMWPE) under uniaxial and biaxial cyclic loading through systematically conducting experiments and model simulations. Experiments involved prescribing axial, strain and stress controlled, cycles to the specimens of UHMWPE. Since the ratcheting strain and its accumulation rate are
This book covers the development of innovative computational methodologies for the simulation of steel material fracture under both monotonic and ultra-low-cycle fatigue. The main aspects are summarised as follows:i) Database of small and full-scale testing data covering the X52, X60, X65, X70 and X80 piping steel grades. The Key Stratum Structure Morphology of Longwall Aug 28, 2020 · Longwall mechanized top coal caving mining (LMTCCM) in extra-thick coal seams has its own characteristics. The law of mining pressure and overlying strata failure height in extra-thick coal seams are much larger than those of medium-thick and thick coal seams. The key stratum structure morphology also has an important influence on the law of overlying strata movement and stability of
In this study, a new ultra-low cycle fatigue (ULCF) damage model was proposed based on the concept that ULCF damage consists of ductile damage under tensile loading and cyclic damage under cyclic loading, which combines stress modified critical strain model, linear Miners damage accumulation rule in ductile damage and nonlinear damage accumulation rule in cyclic damage.