Mechanisms of Damage and Fracture in Trip Assisted Multiphase Steels

2008 ◽  
pp. 819-820 ◽  
Author(s):  
G. Lacroix ◽  
Q. Furnemont ◽  
P. J. Jacques ◽  
T. Pardoen
Keyword(s):  
Damage And Fracture ◽  
Multiphase Steels

scholarly journals Damage and fracture of biological and biomedical materials

2021 ◽  
Vol 241 ◽  
pp. 107067
Author(s):  
Vadim V. Silberschmidt ◽  
Jose Manuel Garcia Aznar
Keyword(s):  
Biomedical Materials ◽  
Damage And Fracture

scholarly journals A Modified Phase-Field Damage Model for Metal Plasticity at Finite Strains: Numerical Development and Experimental Validation

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Jelena Živković ◽  
Vladimir Dunić ◽  
Vladimir Milovanović ◽  
Ana Pavlović ◽  
Miroslav Živković
Keyword(s):  
Phase Field ◽  
Damage Evolution ◽  
Deformation Gradient ◽  
Damage Model ◽  
Steel Structures ◽  
Plasticity Model ◽  
Metal Plasticity ◽  
Damage And Fracture ◽  
Von Mises ◽  
Von Mises Plasticity

Steel structures are designed to operate in an elastic domain, but sometimes plastic strains induce damage and fracture. Besides experimental investigation, a phase-field damage model (PFDM) emerged as a cutting-edge simulation technique for predicting damage evolution. In this paper, a von Mises metal plasticity model is modified and a coupling with PFDM is improved to simulate ductile behavior of metallic materials with or without constant stress plateau after yielding occurs. The proposed improvements are: (1) new coupling variable activated after the critical equivalent plastic strain is reached; (2) two-stage yield function consisting of perfect plasticity and extended Simo-type hardening functions. The uniaxial tension tests are conducted for verification purposes and identifying the material parameters. The staggered iterative scheme, multiplicative decomposition of the deformation gradient, and logarithmic natural strain measure are employed for the implementation into finite element method (FEM) software. The coupling is verified by the ‘one element’ example. The excellent qualitative and quantitative overlapping of the force-displacement response of experimental and simulation results is recorded. The practical significances of the proposed PFDM are a better insight into the simulation of damage evolution in steel structures, and an easy extension of existing the von Mises plasticity model coupled to damage phase-field.

scholarly journals Effect of Porosity on Deformation, Damage, and Fracture of Cast Steel

2013 ◽  
Vol 44 (12) ◽  
pp. 5316-5332 ◽  
Author(s):  
R. A. Hardin ◽  
C. Beckermann
Keyword(s):  
Cast Steel ◽  
Damage And Fracture

Internal and surface damage of multiphase steels and pure iron after electrochemical hydrogen charging

2011 ◽  
Vol 53 (10) ◽  
pp. 3166-3176 ◽  
Author(s):  
D. Pérez Escobar ◽  
C. Miñambres ◽  
L. Duprez ◽  
K. Verbeken ◽  
M. Verhaege
Keyword(s):  
Pure Iron ◽  
Surface Damage ◽  
Hydrogen Charging ◽  
Multiphase Steels

Topology-Optimized Intermediate Casing of Aero Engine and Comparative Evaluation of Titanium and Composite Architecture in Terms of Load Capacity and Weight Reduction

2008 ◽  
Author(s):  
Markus Kober ◽  
Olaf Lenk ◽  
Thomas Klauke ◽  
Arnold Ku¨hhorn
Keyword(s):  
Topology Optimization ◽  
Failure Criterion ◽  
Load Capacity ◽  
Specific Power ◽  
Fracture Plane ◽  
Fiber Reinforced ◽  
Specific Mass ◽  
Fiber Fracture ◽  
Damage And Fracture ◽  
Aero Engine

From Aero Engines of the future it is demanded to provide more power, while the fuel consumption and the mass should decrease. In order to reach the goal of an increasing specific power or a decreasing specific mass, respectively, structural optimization methods, like the topology optimization, find their way into the design process to a greater extent. Additionally one is going to consider more and more fiber reinforced composites as a substitute for titanium alloys in the “cold” structure of the engine. Composite materials offer significant advantages especially concerning the specific mass and the adjustability of their stiffness properties. Unfortunately it is very difficult to predict damage and fracture of such orthotropic materials. The presentation will show the results of a topology optimization of the titanium intermediate-casing of a Rolls-Royce aero engine. Further on the material of the casing will be substituted by a carbon fiber reinforced composite. The fiber orientations and layer thicknesses of the composite are optimized under certain strength constraints, which are described by a modern fracture plane based failure criterion (NASA LaRC04 criterion [6]). Such a failure criterion has a lot of advantages compared to classical ones like Tsai-Hill, Tsai-Wu, ..., which e.g. do not distinguish between fiber and inter-fiber fracture and are therefore not able to predict the type of inter-fiber fracture. Finally the results of the optimization with the current material titanium will be compared to the results of the composite-made intermediate casing in terms of their load capacity and weight.

Microstructure and properties of hot-rolled high strength multiphase steels for automotive application

2002 ◽  
Vol 73 (9) ◽  
pp. 392-402 ◽  
Author(s):  
Igor Y. Pyshmintsev ◽  
Christophe Mesplont ◽  
Sigrid Jacobs ◽  
Bruno C. De Cooman
Keyword(s):  
High Strength ◽  
Automotive Application ◽  
Microstructure And Properties ◽  
Hot Rolled ◽  
Multiphase Steels
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