Calibration method of ductile damage model based on hybrid experimental-numerical analysis of uniaxial tensile and hole-expansion tests

2018 ◽  
Vol 200 ◽  
pp. 218-233 ◽  
Author(s):  
Hela Soussi ◽  
Abdelkader Krichen
Keyword(s):  
Numerical Analysis ◽  
Damage Model ◽  
Calibration Method ◽  
Ductile Damage ◽  
Uniaxial Tensile ◽  
Hole Expansion ◽  
Model Based

Experimental Prediction and Numerical Modeling of Ductile Damage and Failure Modeling of Aluminium Sheet Metal Specimen

2016 ◽  
Vol 852 ◽  
pp. 369-374
Author(s):  
M. Nalla Mohamed ◽  
A. Praveen Kumar ◽  
A. Adil Malik
Keyword(s):  
Numerical Analysis ◽  
Sheet Metal ◽  
Damage Model ◽  
Material Model ◽  
Material Behavior ◽  
Ductile Damage ◽  
Rolled Sheet ◽  
Anisotropic Behavior ◽  
Aluminium Sheet ◽  
Failure Modeling

Aluminium sheet metal is nowadays used to fabricate lighter, crashworthy, fuel efficient and environment friendly vehicles. Ductile damage of sheet metals affects significantly the crashworthiness, as it naturally exhibits anisotropic behavior due to the grain orientation. Johnson-Cook (J-C) damage model is widely used in numerical simulation for assessing the failure modeling of crash component in particular at high strain rate. The Johnson-Cook material model available in literature is meant for isotropic material behavior which cannot be used directly for anisotropic behavior of materials. To characterize the plastic anisotropy of the rolled sheet, the modified Johnson-Cook material model should be developed. In this research the combination of experimental work and numerical analysis with clear and simpler calibration strategy for damage model is demonstrated. It aims to reduce laboratory tests using advanced numerical analysis to predict failure in order to save overall cost and development time.

Micromechanical Analysis of SiC/Al Metal Matrix Composites: Finite Element Modeling and Damage Simulation

2015 ◽  
Vol 07 (02) ◽  
pp. 1550023 ◽  
Author(s):  
Hai Qing ◽  
Tianliang Liu
Keyword(s):  
Metal Matrix ◽  
Damage Model ◽  
Ductile Failure ◽  
Maximum Principal Stress ◽  
Uniaxial Tensile ◽  
Matrix Composites ◽  
Stress Criterion ◽  
Model Based ◽  
Aluminum Metal Matrix Composite ◽  
Damage Simulation

The influence of interface strengths and microstructures on the strength and damage of SiC particle reinforced aluminum Metal Matrix Composite (MMC) is investigated under uniaxial tensile, simple shear, biaxial tensile and combined tensile and shear loadings. An algorithm to generate automatically the microstructural models of MMCs with random distribution of particle shapes, dimensions, orientations and locations is proposed and implemented within Matlab. A damage model based on the stress triaxial indicator is developed to simulate the ductile failure of metal matrix, the other damage model based on the maximum principal stress criterion is developed to simulate the brittle failure of SiC particles, and 2D cohesive element is utilized to describe interface decohesion between matrix and particles. A series of numerical experiments are performed to study the macroscopic stress–strain relationships and microscale damage evolution in MMCs under different loading conditions.

Statistical micromechanical damage model for SH-SFRC under tensile load considering the interfacial slip-softening and matrix spalling effects

2021 ◽  
pp. 105678952110112
Author(s):  
Hehua Zhu ◽  
Xiangyang Wei ◽  
J Woody Ju ◽  
Qing Chen ◽  
Zhiguo Yan ◽  
...  
Keyword(s):  
Strain Hardening ◽  
Steel Fiber ◽  
Damage Model ◽  
Fiber Reinforced Concrete ◽  
Uniaxial Tensile ◽  
Interfacial Slip ◽  
Fiber Reinforced ◽  
Micromechanical Damage ◽  
The Impact ◽  
Micromechanical Damage Model

Strain hardening behavior can be observed in steel fiber reinforced concretes under tensile loads. In this paper, a statistical micromechanical damage framework is presented for the strain hardening steel fiber reinforced concrete (SH-SFRC) considering the interfacial slip-softening and matrix spalling effects. With a linear slip-softening interface law, an analytical model is developed for the single steel fiber pullout behavior. The crack bridging effects are reached by averaging the contribution of the fibers with different inclined angles. Afterwards, the traditional snubbing factor is modified by considering the fiber snubbing and the matrix spalling effects. By adopting the Weibull distribution, a statistical micromechanical damage model is established with the fracture mechanics based cracking criteria and the stress transfer distance. The comparison with the experimental results demonstrates that the proposed framework is capable of reproducing the SH-SFRC’s uniaxial tensile behavior well. Moreover, the impact of the interfacial slip-softening and matrix spalling effects are further discussed with the presented framework.

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