Glass, materials strength

It has been shown that the maximum strength depends on the material composition, the strongest material being associated with quartz glass materials (Figure 5.8). 

Strength and thermal load play an important role in metals, glass materials, and oxide ceramics, so that limits to adhesive technology do become apparent here. 

Loop strength tenacity The tenacity or loop strength value obtained by pulling two loops against each other that can cause the fibrous (particularly glass) material to be cut and/ or crushed. 

In terms of fire resistance considerations, as E-glass fibers and a polyester resin were used, a filled, low viscosity, and self-extinguishing polyester resin was adopted that further showed low flammabihty and medium smoke formation. As fire is an accidental action, the partial load factors could be reduced to 1.0 in the structural design according to the Swiss code. A consideration in the stmctural design of fire situation was that a surface of 2.0 m x 2.0 m of the lower face sheets could fail without collapse of the roof stmcture. This further took into account the reduction of 50% in material strength and stiffness for a 1.0 m wide strip around this surface [19]. 

Fiber-reinforced composite materials are particularly sensitive when exposed to high temperatures, that is, as in the case of fire. When the room temperature is higher than the glass transition temperature (or higher than the melting temperature in the case of senficrystalline materials), strength and stiffness of the FRP system are dramatically impacted. 

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