Experimental characterization and numerical modeling of the thermomechanical behavior at high temperature composite materials reinforced by fibers
Composite materials, such as cement or polymers matrix reinforced with fibers (carbon, glass or other material, …) are often used to repair and / or strengthening the structural elements (slab, beam, column ) in civil works. These composite materials may also be used as support elements in new structures. In case of fire in a civil engineering structure (bridge, building, tunnel, …) high temperature (up to 1200°C) and the various generated smokes can result in severe socio-economic consequences humans, goods and environment. When structures reinforced composite materials are subjected to a fire, the composite materials are simultaneously subjected to mechanical loads and high temperatures (potentially up to 1200°C). So far, the thermomechanical behavior at high temperature composite materials reinforced by fibers is still little studied. The scientific progress on this thesis topic will improve the fire stability of the structures that are reinforced with composite materials. This subject will contribute to significant social and economic interests in civil engineering in the world in general and Vietnam in particular.
My research of the thesis concerns the experimental characterization and numerical modeling of the thermomechanical behavior at high temperature of composite materials reinforced with fibers. The experimental characterization in this thesis is to achieve high-temperature tests, potentially up to 1200°C, on composite materials. These tests requires high-tech equipment. LMC2 (Laboratory of Composite Materials for Construction) is equipped with a highly modern thermo machine to simultaneously generate thermal loads (up to 1200°C) and mechanical stress on the sample tested. This machine is also capable of measuring, during the high temperature test, the sample deformation by a laser sensor and the force and temperature applied to the sample. The digital part of this thesis is to perform modeling, using the finite element method, thermomechanical behavior of composite materials reinforced with fibers, especially microscale (concrete matrix, fiber, matrix / fiber interface). The results obtained in the experiment part will be used to validate the results of numerical modeling part of this thesis.
- Emmanuel FERRIER
- Xuan Hong VU
Beginning and end of the PhD thesis
01/10/2016 – 30/09/2020