Bolt fixings in toughened glass
(2005) VSM820Structural Mechanics
Civil Engineering (M.Sc.Eng.)
- Abstract
- Research needs:
Glass has been used for a long time, mostly in the window and packaging industry, but lately architects and design engineers have become more and
more interested in glass as a load-bearing (building) material. It has become a challenge to use less other materials in the glass-structures or at least not to let it show too much. One area of big interest is bolt fixings. Design engineers are now interested in getting a design tool concerning bolt fixed glass that makes it easy to decide distances both between the holes and from the hole to the edge.
Objectives:
The purpose with this master’s thesis is to investigate and bring forth possible relations between the strength and the design parameters regarding holes in... (More) - Research needs:
Glass has been used for a long time, mostly in the window and packaging industry, but lately architects and design engineers have become more and
more interested in glass as a load-bearing (building) material. It has become a challenge to use less other materials in the glass-structures or at least not to let it show too much. One area of big interest is bolt fixings. Design engineers are now interested in getting a design tool concerning bolt fixed glass that makes it easy to decide distances both between the holes and from the hole to the edge.
Objectives:
The purpose with this master’s thesis is to investigate and bring forth possible relations between the strength and the design parameters regarding holes in glass/bolt fixed glass. Later these relations may be used to establish a simple design tool.
Method:
To identify the loads working on the glass fixing a simple finite element modelling of a glass balustrade was done with a line-load placed at right
angles to the upper edge. The result from this helped to come up with a suitable way to perform practical tests to decide the strength of the glass around the hole. The practical tests were also analysed in detail with the finite element method-based (FEM-based) program ABAQUS to be able to compare the calculations with the real tests and in that way confirm any given relations so that the program can be used to simulate the reality and give analytical connections.
Conclusions:
Glass is a strong material and can take far higher tensile stresses than most design data is indicating, but that concerns glass exposed only to
pressure or tensile stress. Glass exposed to bending leads to a moment at the fixing too big for the glass with only one bolt to handle. To receive a better statistical basis to establish a trustable design tool, more sets of testing has to be performed. Glass has numerous defects very difficult for the human eye to detect, why further testing is quite important for the determination of the strength. The finite element analyses (FE-analyses) for the compression test corresponds pretty well to the experimental test, whereas the bending test analysis should be calibrated more accurately if it is going to be used as a tool of comparison between different parameters. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/3566789
- author
- Bength, Camilla
- supervisor
- organization
- course
- VSM820
- year
- 2005
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Toughened laminated float glass, tensile strength, Young’s Modulus, bolt fixings, FEM, ABAQUS
- report number
- TVSM-5136
- ISSN
- 0281-6679
- language
- English
- id
- 3566789
- date added to LUP
- 2013-08-05 14:48:49
- date last changed
- 2013-09-19 14:37:16
@misc{3566789,
abstract = {{Research needs:
Glass has been used for a long time, mostly in the window and packaging industry, but lately architects and design engineers have become more and
more interested in glass as a load-bearing (building) material. It has become a challenge to use less other materials in the glass-structures or at least not to let it show too much. One area of big interest is bolt fixings. Design engineers are now interested in getting a design tool concerning bolt fixed glass that makes it easy to decide distances both between the holes and from the hole to the edge.
Objectives:
The purpose with this master’s thesis is to investigate and bring forth possible relations between the strength and the design parameters regarding holes in glass/bolt fixed glass. Later these relations may be used to establish a simple design tool.
Method:
To identify the loads working on the glass fixing a simple finite element modelling of a glass balustrade was done with a line-load placed at right
angles to the upper edge. The result from this helped to come up with a suitable way to perform practical tests to decide the strength of the glass around the hole. The practical tests were also analysed in detail with the finite element method-based (FEM-based) program ABAQUS to be able to compare the calculations with the real tests and in that way confirm any given relations so that the program can be used to simulate the reality and give analytical connections.
Conclusions:
Glass is a strong material and can take far higher tensile stresses than most design data is indicating, but that concerns glass exposed only to
pressure or tensile stress. Glass exposed to bending leads to a moment at the fixing too big for the glass with only one bolt to handle. To receive a better statistical basis to establish a trustable design tool, more sets of testing has to be performed. Glass has numerous defects very difficult for the human eye to detect, why further testing is quite important for the determination of the strength. The finite element analyses (FE-analyses) for the compression test corresponds pretty well to the experimental test, whereas the bending test analysis should be calibrated more accurately if it is going to be used as a tool of comparison between different parameters.}},
author = {{Bength, Camilla}},
issn = {{0281-6679}},
language = {{eng}},
note = {{Student Paper}},
title = {{Bolt fixings in toughened glass}},
year = {{2005}},
}