Ductile fracture simulations by damage model and finite cover method

2016 ◽  
Vol 2016.29 (0) ◽  
pp. 4_210
Author(s):  
Hirofumi SUGIYAMA ◽  
Kazumi MATSUI ◽  
Takahiro YAMADA
Keyword(s):  
Ductile Fracture ◽  
Damage Model ◽  
Finite Cover ◽  
Finite Cover Method

A new microvoid-damage model for ductile fracture

1986 ◽  
Vol 25 (3) ◽  
pp. 377-384 ◽  
Author(s):  
Wei Hua Tai ◽  
Bing Xian Yang
Keyword(s):  
Ductile Fracture ◽  
Damage Model

Numerical Investigation of Ductile Fracture in Pipelines Under Complex Loading Using a Phenomenological Damage Model

2021 ◽  
Author(s):  
Iago S. Santos ◽  
Diego F. B. Sarzosa
Keyword(s):  
Ductile Fracture ◽  
Mechanical Response ◽  
Numerical Study ◽  
Damage Model ◽  
Stress Triaxiality ◽  
Numerical Procedure ◽  
Complex Loading ◽  
Experimental Tests ◽  
Compact Tension ◽  
Axial Tensile

Abstract This paper presents a numerical study on pipes ductile fracture mechanical response using a phenomenological computational damage model. The damage is controlled by an initiation criterion dependent on the stress triaxiality and the Lode angle parameter, and a post-initiation damage law to eliminate each finite element from the mesh. Experimental tests were carried out to calibrate the elastoplastic response, damage parameters and validate the FEM models. The tested geometries were round bars having smooth and notched cross-section, flat notched specimens under axial tensile loads, and fracture toughness tests in deeply cracked bending specimens SE(B) and compact tension samples C(T). The calibrated numerical procedure was applied to execute a parametric study in pipes with circumferential surface cracks subjected to tensile and internal pressure loads simultaneously. The effects of the variation of geometric parameters and the load applications on the pipes strain capacity were investigated. The influence of longitudinal misalignment between adjacent pipes was also investigated.

Ductile Tearing Simulation of Circumferential Cracked Pipe Under Cyclic Loading Using Damage Criteria Determined by Monotonic Pipe Test Data

2018 ◽  
Author(s):  
Jin-Ha Hwang ◽  
Gyo-Geun Youn ◽  
Naoki Miura ◽  
Yun-Jae Kim
Keyword(s):  
Fracture Toughness ◽  
Cyclic Loading ◽  
Ductile Fracture ◽  
Test Data ◽  
Strain Energy ◽  
Fracture Strain ◽  
Damage Model ◽  
Fracture Toughness Test ◽  
Ductile Tearing ◽  
Damage Criteria

To evaluate the structural integrity of nuclear power plant piping, it is important to predict ductile tearing of circumferential cracked pipe from the view point of Leak-Before-Break concept under seismic conditions. CRIEPI (Central Research Institute of Electric Power Industry) conducted fracture test on Japanese carbon steel (STS410) circumferential through-wall cracked pipes under monotonic or cyclic bending load in room temperature. Cyclic loading test conducted variable experimental conditions considering effect of stress ratio and amplitude. In the previous study, monotonic fracture pipe test was simulated by modified stress-strain ductile damage model determined by C(T) specimen fracture toughness test. And, ductile fracture of pipe under cyclic loading simulated using damage criteria based on fracture strain energy from C(T) specimen test data. In this study, monotonic pipe test result is applied to determination of damage model based on fracture strain energy, using finite element analysis, without C(T) specimen fracture toughness test. Ductile fracture of pipe under variable cyclic loading conditions simulates using determined fracture energy damage model from monotonic pipe test.

A void evolution-based damage model for ductile fracture of metallic materials

2019 ◽  
Vol 04 (04) ◽  
pp. 1950008
Author(s):  
He Gong ◽  
Changhong Chen ◽  
Yao Yao
Keyword(s):  
Ductile Fracture ◽  
Damage Mechanics ◽  
Damage Model ◽  
Continuum Damage Mechanics ◽  
Metallic Materials ◽  
Numerical Predictions ◽  
Void Evolution ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

A modified damage model is developed for describing ductile fracture of metallic materials by introducing damage variables with respect to porosity. Based on the geometric characteristics of the void deformation process, modified governing equations of void evolution are proposed to reduce the dependence of micro parameters. A transformed variable is introduced to incorporate the porosity into continuum damage mechanics. The numerical predictions are compared with experimental results for AISI-1095, AISI-1090 and AISI-1045 steel.

scholarly journals DEVELOPMENT OF FRACTURE SIMULATION BY THE FINITE COVER METHOD USING INTERFACE ELEMENT

2005 ◽  
pp. 213-225 ◽  
Author(s):  
Tateki ISHII ◽  
Kenjiro TERADA ◽  
Takashi KYOYA ◽  
Yuji KISHINO
Keyword(s):  
Interface Element ◽  
Finite Cover ◽  
Fracture Simulation ◽  
Finite Cover Method
Sign in / Sign up

Export Citation Format

Share Document