Delamination and First Ply Failure Study of Composite Conoidal Shells
Journal Title: Bonfring International Journal of Industrial Engineering and Management Science - Year 2012, Vol 2, Issue 4
Abstract
Interlaminar and intralaminar failure modes of composite conoidal shells are investigated in this paper using finite element as the mathematical tool. One of the prerequisites for confidently applying the composite shells in practical civil engineering is to have a comprehensive idea about the shell behavior under different loading conditions. The static bending and free vibration responses of laminated composite conoidal shells are now well known as a good number of technical papers have been published by different researchers. But for these materials which are weak in transverse shear failure may initiate at any inner lamina or interface and may remain undetected and unattended. Such latent damages may progress gradually and lead to a sudden total ply failure. Due to fabrication problems or overloading, delamination defect may occur and remain hidden within the lamina. Hence it is imperative to have knowledge of the first ply failure load and the load at which delamination initiates. To explore this area, in this paper, a simply supported shell is considered loaded by concentrated load. Lamination and the load position are varied to investigate the first ply failure characteristics of the composite shell. Well accepted failure theories like maximum stress, Hoffman, Tsai-Wu and Tsai-Hill are used in the current formulation to obtain failure loads. While obtaining the failure loads, each lamina is considered to be under plane stress condition i.e. no transverse stresses are considered to act on any lamina. Comparison of failure loads obtained from both the failure modes are also presented to get the minimum failure load which will govern the shell design.
Authors and Affiliations
Kaustav Bakshi , Dipankar Chakravorty
Keywords
Related Articles
- EP ID EP87261
- DOI 10.9756/BIJIEMS.1658
- Views 141
- Downloads 0
Enhancement of Turbulent Heat Transfer Using Copper Twisted Tape
Augmentation of turbulent flow heat transfer in a horizontal tube by means of twisted tape inserts with air as the working fluid. In order to reduce excessive pressure drops associated with full width twisted tape insert...
Defluoridation of Groundwater using Low Cost Adsorbent like Bagasse Dust, Aluminium Treated Bagasse Flyash, Bone Powder and Shell Powder
Excessive fluoride concentrations have been reported in groundwaters of more than 20 developed and developing countries including India where 19 states are facing acute fluorosis problems. Various technologies are being...
DPIRS Framework for Sustainable Development of Coastal Areas
Presently 21% of the world population lives within 30 kms of the coastal areas. Coastal zones are therefore of great importance as zones of settlement and play a vital role in the economic well-being of many nations. Ind...
Almost Unbiased Modified Linear Regression Estimators for Estimation of Population Mean
The present paper deals with a class of modified linear regression type estimators which are almost unbiased. We have derived their variances together with the values for which the proposed class of estimators perform b...
A Comparative Study on Removal of Toluene by Batch Reactor using Different Fungal Culture Isolated from Municipal Sewage Water
The increasing rate of polluted gases in the atmosphere raises some of the major environmental and human health related problems that was recently suspected; hence the comparative study on removal of toluene by batch rea...