- TITLE:
STACKING SEQUENCE OPTIMIZATION WITH FAILURE CRITERIA
- AUTHOR(S):
F. KARACAM, T. TIMARCI
- ABSTRACT:
Optimum stacking sequences of laminated composite beams are investigated for minimum
normal and shear stresses by the use of two different failure criteria for different boundary
conditions. The stacking sequence optimization is carried out by genetic algorithm (GA) optimization
technique. Fiber orientation angles are used as the design parameters. During the optimization
process, Tsai-Wu and Tsai-Hill failure criteria are both used as a control mechanism in the
algorithm for each generation. Since the minimization of bending stress parameters and failure
analysis are performed at the same time, convergence and reliability of the optimum stress values
are improved respectively.
- PAGES:
STACKING SEQUENCE OPTIMIZATION WITH FAILURE CRITERIA
- DOWNLOAD:
66-69-min.pdf
- TITLE:
RELIABILITY OF PIPES WITH A DEFECT IN THE VOLUMETRIC HYDRAULIC SYSTEMS
- AUTHOR(S):
N. Stefanov, K. Ormandzhiev, I. Iliev
- ABSTRACT:
There has been composed a methodology for evaluating the reliability of oval section tubes in the
presence of a flat elliptical defect in terms of fluctuations of temperature and pressure.
Given methods allow quantitative to value residual longevity of the pipes with developing fatigue
crack.
The model based on the criterion of the critical crack opening.
The calculation results on the model are in accordance with the experimental data obtained by
other autors investigating the fracture of pipes and pressure vessels with longitudinal surface cracks.
- DOWNLOAD:
RELIABILITY OF PIPES WITH A DEFECT IN THE VOLUMETRIC HYDRAULIC SYSTEMS
- TITLE:
PROVIDING MECHANICAL CHARACTERISTICS OF WELDING-SOLDERED THINWALLED STRUCTURES OF FIVE-COMPONENT HEAT-RESISTANT ALLOYS
- AUTHOR(S):
E. Lashko, O. Salenko, I. Gusarova
- ABSTRACT:
The main task of the research is to establish the regularities of the formation of a non-detachable
compound of thin-walled elements from the Ni-20Cr-6Al-1Ti-1Y2O3 alloy and to determine the
functional condition of the influence of soldering modes on the physical-mechanical characteristics
of the compound. It has been shown the modeling of temperature fields in ANSYS 18.1. It has been
established that the process of vacuum soldering should take place at a temperature of 1350°C for
15-20 min; the strength of the resulting compound is 390-420 MPa when the sample is stretched. The
obtained information can be used as a theoretical basis for the development of the manufacturing
process of the elements of the spaceship heat-shielding system
- DOWNLOAD:
PROVIDING MECHANICAL CHARACTERISTICS OF WELDING-SOLDERED THINWALLED STRUCTURES OF FIVE-COMPONENT HEAT-RESISTANT ALLOYS
- TITLE:
MATERIAL SELECTION IN DETERMINATION OF POSITION AND SIZE FOR ARTIFICIAL ORGANS
- AUTHOR(S):
S. ERSOY, İ. ERTUĞRUL, O. ÜLKİR, İ. TEMİZ
- ABSTRACT:
The lack of a limb and function may adversely affect human life. This removal of acids in the
treatment of medical intervention, repair or remedy possible. However, the human body and system
in the human body anatomical differences in the standard prosthesis produced differences in the
structure of harmony and repetition of the problems that may arise on the settlement of the
transaction, can lead to movement in human life and health. In addition, this prosthesis, but the
adjustment process after the placement process can be monitored. In this process, the most common
problems can emerge as a good physician and operations despite sinking prosthesis prosthesis over
the slightest slip uncomfortable situations based on location. Physician experience is very important
for the placement of the prosthesis. However, if a physician's experience in achieving a higher
number of subjects studied it is inevitable. Total joint replacement, adding that changing the
damaged joint surfaces of artificial materials with function again gain stability and aims to eliminate
the existing pain. Thanks to the support of the design and modelling success during assembling
prostheses to be made available to increase the percentage increase in our study, the cost of these
works to eliminate the risk of failure and contributes to better quality of human life. Experience and
intuitive approach of physicians able to offer insight into the process as well bite the positive
approach in science as we define additional targets.
In this study, 3 steps have been applied to place a special prosthesis. Firstly, the choice of
material for the appropriate prosthesis. In the second step, the size and position of the prosthesis that
will be specially needed will be scanned and produced. Finally, placement of the prosthesis in the
body was carried out. As the first step in this article, the selection of the right material in denture
production has been examined.
- DOWNLOAD:
MATERIAL SELECTION IN DETERMINATION OF POSITION AND SIZE FOR ARTIFICIAL ORGANS
- TITLE:
S. ERSOY, İ. ERTUĞRUL, O. ÜLKİR, İ. TEMİZ
- AUTHOR(S):
S. ERSOY, İ. ERTUĞRUL, O. ÜLKİR, İ. TEMİZ
- ABSTRACT:
The lack of a limb and function may adversely affect human life. This removal of acids in the
treatment of medical intervention, repair or remedy possible. However, the human body and system
in the human body anatomical differences in the standard prosthesis produced differences in the
structure of harmony and repetition of the problems that may arise on the settlement of the
transaction, can lead to movement in human life and health. In addition, this prosthesis, but the
adjustment process after the placement process can be monitored. In this process, the most common
problems can emerge as a good physician and operations despite sinking prosthesis prosthesis over
the slightest slip uncomfortable situations based on location. Physician experience is very important
for the placement of the prosthesis. However, if a physician's experience in achieving a higher
number of subjects studied it is inevitable. Total joint replacement, adding that changing the
damaged joint surfaces of artificial materials with function again gain stability and aims to eliminate
the existing pain. Thanks to the support of the design and modelling success during assembling
prostheses to be made available to increase the percentage increase in our study, the cost of these
works to eliminate the risk of failure and contributes to better quality of human life. Experience and
intuitive approach of physicians able to offer insight into the process as well bite the positive
approach in science as we define additional targets.
In this study, 3 steps have been applied to place a special prosthesis. Firstly, the choice of
material for the appropriate prosthesis. In the second step, the size and position of the prosthesis that
will be specially needed will be scanned and produced. Finally, placement of the prosthesis in the
body was carried out. As the first step in this article, the selection of the right material in denture
production has been examined.
- DOWNLOAD:
S. ERSOY, İ. ERTUĞRUL, O. ÜLKİR, İ. TEMİZ
