A micro mechanical study on DP600 steel under tensile loading using Lemaitre damage model coupled with combined hardening

2020 ◽  
Vol 772 ◽  
pp. 138774 ◽  
Author(s):  
Manizheh Aghaei ◽  
Saeid Ziaei-Rad
Keyword(s):  
Damage Model ◽  
Tensile Loading ◽  
Mechanical Study ◽  
Combined Hardening ◽  
Lemaitre Damage Model

Progressive damage characteristics of screwed single-lap CFRPI-metal joint subjected to tensile loading at RT and 350°C

2021 ◽  
pp. 002199832098559
Author(s):  
Yun-Tao Zhu ◽  
Jun-Jiang Xiong ◽  
Chu-Yang Luo ◽  
Yi-Sen Du
Keyword(s):  
Damage Model ◽  
Tensile Loading ◽  
Tensile Tests ◽  
Displacement Curve ◽  
Progressive Damage ◽  
Damage Characteristics ◽  
Metal Joint ◽  
Static Tensile ◽  
Strength And Stiffness ◽  
Progressive Damage Model

This paper outlines progressive damage characteristics of screwed single-lap CFRPI-metal joints subjected to tensile loading at RT (room temperature) and 350°C. Quasi-static tensile tests were performed on screwed single-lap CCF300/AC721-30CrMnSiA joint at RT and 350°C, and the load versus displacement curve, strength and stiffness of joint were gauged and discussed. With due consideration of thermal-mechanical interaction and complex failure mechanism, a modified progressive damage model (PDM) based on the mixed failure criterion was devised to simulate progressive damage characteristics of screwed single-lap CCF300/AC721-30CrMnSiA joint, and simulations correlate well with experiments. By using the PDM, the effects of geometry dimensions on mechanical characteristics of screwed single-lap CCF300/AC721-30CrMnSiA joint were analyzed and discussed.

Damage Evolution and Failure Modeling in Unidirectional Graphite/Epoxy Composite

2001 ◽  
Author(s):  
G. P. Tandon ◽  
R. Y. Kim
Keyword(s):  
Damage Evolution ◽  
Failure Modes ◽  
Epoxy Composite ◽  
Damage Model ◽  
Tensile Loading ◽  
Unidirectional Composite ◽  
Concentric Cylinder ◽  
Failure Modeling ◽  
Stress Levels

Abstract A study is conducted to examine and predict the micromechanical failure modes in a unidirectional composite when subjected to tensile loading parallel to the fibers. Experimental observations are made at some selected stress levels to identify the initiation and growth of micro damage during loading. The axisymmetric damage model of a concentric cylinder is then utilized to postulate and analyze some failure scenarios.

IMPLEMENTATION OF THE LEMAITER DAMAGE MODEL IN ANSYS FINITE ELEMENT COMPLEX

2020 ◽  
pp. 30-48
Author(s):  
D.A. Kosov ◽  
◽  
D.I. Fedorenkov ◽  
A.V. Tumanov ◽  
◽  
...  
Keyword(s):  
Finite Element ◽  
Numerical Experiment ◽  
Numerical Experiments ◽  
Damage Accumulation ◽  
Cylindrical Specimen ◽  
Damage Model ◽  
Finite Element Calculation ◽  
Element Calculation ◽  
Lemaitre Damage Model ◽  
Calculation Software

In this work, the simplified Lemaitre damage model was integrated into the ANSYS finite element calculation software. The model is implemented as a dynamically linked library of custom material for 2D problems. The model was tested on a cylindrical specimen with an annular cut. The stages of damage accumulation in the numerical experiment coincide with similar numerical experiments known in the literature.

A Multi-Level Superelement Technique for Damage Analysis

2002 ◽  
Author(s):  
J. P. Fan ◽  
C. Y. Tang ◽  
C. L. Chow
Keyword(s):  
Damage Model ◽  
Tensile Loading ◽  
Volume Element ◽  
Damage Analysis ◽  
Two Dimensional ◽  
Element Computation ◽  
Isotropic Damage ◽  
Multi Level ◽  
Abaqus Code ◽  
Finite Element Computation

A multi-level superelement technique is applied to model the effects of circular voids on the effective elastic properties of a material. A two-dimensional representative volume element with a circular void in its center is initially modeled by a superelement. Using this superelement, a thin planar material with circular voids is constructed. The finite element computation is then conducted to estimate the effective Young’s modulus, Poisson’s ratio and the shear modulus of the material using the ABAQUS code for different void sizes. The values of the isotropic damage variables, DE and DG, under various degree of damage are hence determined. These values are compared with those calculated by using a conventional micromechanics damage model. A new isotropic damage model is proposed based on the results of this analysis. To demonstrate the applicability of this damage model, an example case of a notched cylindrical bar under tensile loading is investigated.

scholarly journals Meso Mechanical Study of Cracking Process in Concrete Subjected to Tensile Loading

2018 ◽  
Vol 59 (1) ◽  
pp. 13-29 ◽  
Author(s):  
Mathias Flansbjer ◽  
Jan Erik Lindqvist
Keyword(s):  
Acoustic Emission ◽  
Digital Image Correlation ◽  
Tensile Loading ◽  
Experimental Methods ◽  
Image Correlation ◽  
Critical Parameters ◽  
Small Scale ◽  
Mechanical Study ◽  
Measuring Techniques ◽  
Cracking Process

Abstract This project focused on how the cracking process in concrete is influenced by both the micro and meso structures of concrete. The aim was to increase knowledge pertaining to the effect of critical parameters on the cracking process and how this is related to the material’s macroscopic properties. A methodology based on the combination of different experimental methods and measuring techniques at different scales was developed. Crack propagation during tensile loading of small-scale specimens in a tensile stage was monitored by means of Digital Image Correlation (DIC) and Acoustic Emission (AE). After testing, crack patterns were studied using fluorescence microscopy.

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