Click for new scientific resources and news about Corona[COVID-19]

Paper Information

Journal:   MODARES TECHNICAL AND ENGINEERING   Summer 2003 , Volume - , Number 12; Page(s) 43 To 56.
 
Paper: 

A SEQUENTIAL LINEAR PROGRAMMING METHOD FOR DELAMINATION GROWTH MODELING IN LAMINATED COMPOSITES

 
 
Author(s):  JAVIDRAD F.*
 
* Department of Aerospace Engineering, Airforce Academy of Shahid Sattari, Tehran, Iran
 
Abstract: 

In this paper, a novel automated method for modeling 2D and 3D planar delamination growth in laminated composites under mode-I, mode II and mixed model-I/II displacement components is introduced. The method is based on minimizing the difference between strain energy release rate value/distribution (G) at/along the crack front and interlaminar fracture toughness. The method consists of the virtual crack closure technique for calculation of G and a moving mesh algorithm embedded in an optimization solution procedure. The standard sequential linear programming (SLP) performs the solution of the optimization problem. It has already been shown that the SLP method has good convergence and stability behavior in general engineering optimization problems. To further increase the performance of the SLP method in G-gradients calculation, a technique based on the difference of elemental stiffness has been developed. This technique enables calculation of G-gradients in the postprocessor part of the solution, without imposing a large amount of numerical calculation efforts. The efficiency and performance of the technique has been investigated by solving three case studies. In all three cases, good performance and acceptable numerical efficiency have been achieved.

 
Keyword(s): DELAMINATION FRACTURE, COMPOSITE, SEQUENTIAL LINEAR PROGRAMMING, FINITE ELEMENT, CRACK GROWTH MODELING
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 82
 
Latest on Blog
Enter SID Blog