scholarly journals The prediction of crack growth in bonded joints under cyclic-fatigue loading II. Analytical and finite element studies

2003 ◽  
Vol 23 (6) ◽  
pp. 463-471 ◽  
Author(s):  
H. Hadavinia ◽  
A.J. Kinloch ◽  
M.S.G. Little ◽  
A.C. Taylor
Keyword(s):  
Finite Element ◽  
Crack Growth ◽  
Fatigue Loading ◽  
Cyclic Fatigue ◽  
Bonded Joints

Three-Dimensional Finite Element Prediction of Machining-Induced Stresses

Manufacturing ◽  
2003 ◽  
Author(s):  
T. D. Marusich ◽  
S. Usui ◽  
R. J. McDaniel
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Metal Cutting ◽  
Three Dimensional ◽  
Constitutive Models ◽  
Fatigue Loading ◽  
Cyclic Fatigue ◽  
Fem Model ◽  
Machined Parts ◽  
Three Dimensional Finite Element

Controlling residual stress in machined workpiece surfaces is necessary in situations where service requirements subject structural members to cyclic fatigue loading. It is desirable to have a predictive capability when attempting to optimize machined parts for cost while taking into account residual stress considerations. One such method of machining modeling is application of the finite element method (FEM). A three-dimensional FEM model is presented which includes fully adaptive unstructured mesh generation, tight thermo-mechanically coupling, deformable tool-chip-workpiece contact, interfacial heat transfer across the tool-chip boundary, momentum effects at high speeds and constitutive models appropriate for high strain rate, finite deformation analyses. The FEM model is applied to nose turning operations with stationary tools. To substantiate the efficacy of numerical and constitutive formulations used, metal cutting tests are performed, residual stress profiles collected, and validation comparison is made.

An Experimental Technique for Studying Mixed-Mode Fatigue Crack Growth in Solder Joints

1996 ◽  
Vol 118 (2) ◽  
pp. 45-48 ◽  
Author(s):  
Daping Yao ◽  
Z. Zhang ◽  
J. K. Shang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Crack ◽  
Crack Growth ◽  
Mixed Mode ◽  
Solder Joints ◽  
Fatigue Loading ◽  
Mixed Mode Loading ◽  
Element Analysis ◽  
Solder Layer

Failures of solder joints often result from development of cracks under complex mixed-mode loading conditions. In this study, a flexural peel technique was developed to investigate the growth of cracks at the interface between solder and Cu substrate. The technique was based on a tri-layer solder/Cu joints, with the solder layer sand-wiched between two Cu layers of desired thicknesses. Finite element analysis was used to calculate the mixed-mode condition at the crack tip as a function of the thicknesses of Cu outerlayers and the solder interlayer. The application of this technique to studying interface crack growth under fatigue loading is demonstrated for eutectic solder joints.

Crack growth in adhesively bonded joints subjected to variable frequency fatigue loading

2003 ◽  
Vol 79 (12) ◽  
pp. 1161-1182 ◽  
Author(s):  
A. H. Al-Ghamdi ◽  
I. A. Ashcroft ◽  
A. D. Crocombe ◽  
M. M. Abdel-Wahab
Keyword(s):  
Crack Growth ◽  
Fatigue Loading ◽  
Variable Frequency ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints

Debonding Under Fatigue Loading at Polymer/Inorganic Interfaces

2004 ◽  
Vol 821 ◽  
Author(s):  
Bree M. Sharratt ◽  
Reinhold H. Dauskardt
Keyword(s):  
Crack Growth ◽  
Growth Rates ◽  
Interfacial Crack ◽  
Load Ratio ◽  
Fatigue Loading ◽  
Cyclic Fatigue ◽  
Crack Growth Behavior ◽  
Bisphenol F ◽  
Passivated Silicon ◽  
Crack Growth Rates

AbstractThe mechanisms associated with cycle-by-cycle damage accumulation resulting in fatigue crack propagation between a highly constrained polymer layer and an adjacent elastic substrate are explored. Specifically, cyclic fatigue-induced crack growth between a bisphenol F model epoxy system and a passivated silicon substrate under Mode I loading is reported. Preliminary findings regarding the effects of fatigue load ratio on interfacial crack growth rates are presented. While intermediate crack growth rates were significantly accelerated under cyclic loading, the near-threshold crack growth behavior under cyclic and monotonic loading was surprisingly similar.

scholarly journals Fatigue Delamination Crack Growth in GFRP Composite Laminates: Mathematical Modelling and FE Simulation

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Hassan Ijaz ◽  
Waqas Saleem ◽  
Muhammad Zain-ul-abdein ◽  
Aqeel Ahmad Taimoor ◽  
Abdullah Salmeen Bin Mahfouz
Keyword(s):  
Finite Element ◽  
Crack Growth ◽  
Composite Laminates ◽  
Damage Model ◽  
Fatigue Loading ◽  
Mechanical And Thermal Properties ◽  
Delamination Crack ◽  
Finite Element Software ◽  
Gfrp Composite ◽  
Experimental Findings

Glass fibre-reinforced plastic (GFRP) composite laminates are used in many industries due to their excellent mechanical and thermal properties. However, these materials are prone to the initiation and propagation of delamination crack growth between different plies forming the laminate. The crack propagation may ultimately result in the failure of GFRP laminates as structural parts. In this research, a comprehensive mathematical model is presented to study the delamination crack growth in GFRP composite laminates under fatigue loading. A classical static damage model proposed by Allix and Ladevèze is modified as a fatigue damage model. Subsequently, the model is implemented in commercial finite element software via UMAT subroutine. The results obtained by the finite element simulations verify the experimental findings of Kenane and Benzeggagh for the fatigue crack growth in GFRP composite laminates.

Nonlinear Viscoelastic Finite Element Analysis of Adhesive Joints

1988 ◽  
Vol 16 (3) ◽  
pp. 146-170 ◽  
Author(s):  
S. Roy ◽  
J. N. Reddy
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Viscoelastic Behavior ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Element Analysis ◽  
Adhesively Bonded Joints ◽  
Nonlinear Viscoelastic ◽  
Structural Failures ◽  
Updated Lagrangian

Abstract A good understanding of the process of adhesion from the mechanics viewpoint and the predictive capability for structural failures associated with adhesively bonded joints require a realistic modeling (both constitutive and kinematic) of the constituent materials. The present investigation deals with the development of an Updated Lagrangian formulation and the associated finite element analysis of adhesively bonded joints. The formulation accounts for the geometric nonlinearity of the adherends and the nonlinear viscoelastic behavior of the adhesive. Sample numerical problems are presented to show the stress and strain distributions in bonded joints.

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