The application of fiberglass profiles brings into play a very broad scope. When speaking about advantages given by fiberglass pultruded profiles both at high and medium load-bearing capacity, are part of many solutions, among which the choice of custom-made fiberglass profiles is included.
To give details on peculiarities in a clear manner, in this case we get into the field of railway infrastructure, considering the importance of installing safe electrical conduits, sustainable from an economic point of view and long lasting. Speaking about advantages given by the use of custom-made fiberglass profiles to produce electrical conduits, it means to remember first of all a low electrical conductivity, as well as lightness and stability.
These features represent a remarkable turning point in comparison with steel performance, a material which is still widely used within the private building, but also when it comes to production of electrical conduitsfor rail transport infrastructure and not only.
It is possible to make a qualitative leap with custom-made fiberglass profiles –cut with diamond blades to obtain the required sizes from time to time – and appreciate significant improvements of electrical insulation, but also from the point of view of corrosion resistance and atmospheric agents.
Therefore, custom-made fiberglass profiles are not only a guarantee of security for the entire electrical system, but also a solution allowing you to save more money, thanks to a useful life of the main material which is absolutely inconceivable, if you use steel.
Personalization of fiberglass profiles offers added value of which is impossible to ignore. When speaking about infrastructures of large sizes is essential to have the opportunity to work, taking into account details and customize elements of the electrical system, such as conduitsthat can be appreciated for their really interesting final result, when they are made of fiberglass profiles.
Producing grates in large sizes in the best possible way, it means taking into account the use of materials other than steel. There are certainly many advantages of using steel, but far fewer than those found thanks to the use of fiberglass.
Molded fiberglass gratings with non-slip finish represent a solution which is becoming increasingly central among designers choices. Why? First of all, because fiberglass is a material resistant to the atmospheric agents and to acid and base attacks. This makes the choice of molded fiberglass gratings – perfectly tailor-made – a congenial option, when it comes to produce grates exposed to the outside for the most part of their extension.
Another advantage of this choice on molded fiberglass gratings with non-slip finish concerns the fact that fiberglass, though it is very light in weight, is able to withstand high load capacities that may reach about 50 quintals.
Due to its lower relative density, it is definitely stronger than steel at equal weight. We previously have referred to as moulding process represents the perfect solution for those who would like to have a perfect production according to their needs, with the possibility of customizing the end product and making it economically advantageous from the point of view of immediate costs and sustainable in the long term. Fiberglass, as already specified, is extremely resistant to corrosion and has become synonymous with a longer useful life of products.
Ease of assembly, lightness of the entire structure, long-term maintenance savings: these and many other benefits of molded fiberglass gratings with non-slip finish, sustainable and technically advanced solutions for grates in large sizes that can be produced with a technical perfection, which is unthinkable by steel.
[To be continued…]
The overall mechanical behavior shows elastic-brittle features until reaching an ultimate strength and, therefore, a sudden collapse without further deformative contributions.
Figure 1 – A comparative stress-strain graph (www.saimex.it)
Features and advantages:
- high mechanical resistance;
- thermal insulation/thermal break;
- recommended maximum operating temperature 60°÷90° (using high-performance resins);
- maximum temperature range – 40°C ÷ 180°C;
- corrosion resistance;
- profiles based on customer’s drawings.
If the temperature range is low, the pultruded material doesn’t show any decay of mechanical performance; on the contrary it is possible observe an increase in the strength parameters.
The material leaves a wide margin of designing in relation to its thermal and electrical properties; the longitudinal extension in the direction of fibers is limited, whereas the same doesn’t happen along the two transverse directions. The material takes on a similar behaviour, even when the thermal conductivity is concerned with small changes depending on the fiber used. The response to electromagnetic stresses is on the whole good, although it is rather moderate against the carbon fiber composite materials.
Hereunder you find a comparative table of the key features of Pultruded Materials and of the major competitive materials:
|Tensile strength [MPa]
||350 – 400
||370 – 500
||200 – 400
||40 – 60
|Pull elongation [%]
||1.5 – 2.0
||13 – 35
||5 – 35
||10 – 80
|Flexural strength [MPa]
||400 – 450
||330 – 500
||200 – 400
||70 – 100
|Elastic modulus [103 MPa]
||25 – 30
||2.8 – 3.3
[103 MPa]15 – 20210702.8 – 3.3Impact resistance [MPa/m2]20040020085 – 95Thermal conductivity [W/m°C]0.25 – 0.35100 – 230100 – 2300.15 – 0.25Coefficient of thermal expansion [106 MPa/m°C]5 – 2010 – 1420 – 2550-100Dielectric capacity [KV/mm]5 – 15–40 – 50Volume resistivity [wcm]1010 – 10140.2 – 0.80.028> 1016
Table 1 – comparative table of mechanical features of materials under consideration (www.saimex.it)
[Coming up ‘Tests performed at the Technical University of Milan’]