https://doi.org/10.1140/epjp/s13360-024-05818-4
Regular Article
Fracture failure behavior of Al2O3 fabric under the combined interaction of high-temperature heat flow and tensile load
Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, 110159, Shenyang, China
Received:
7
February
2024
Accepted:
16
March
2024
Published online:
17
December
2024
The aircraft will be subjected to severe aerodynamic and thermal effects during the reentry of the spacecraft into the earth’s atmosphere. Flexible woven structure plays an important role in thermal protection of aircraft surface, and Al2O3 fiber fabric is an important candidate material in weaponry, aerospace and other fields, which puts forward higher requirements for the prediction of mechanical properties at high temperature. In this paper, the extreme environment faced by the thermal protection structure during the high-speed entry/reentry of spacecraft is simulated by using the self-built loading and testing system of oxygen–methane high-temperature heat flow and mechanical stretching. Based on the experimental data, the finite element model of Al2O3 fabric was constructed. Combined with the stress–strain relationship and physical parameters of the material, the fracture process of Al2O3 fiber fabric under the combined action of high-temperature heat flow and tensile load was simulated. The results show that due to the poor high-temperature stability of amorphous SiO2 phase in Al2O3 fiber under high-temperature heat flow, the surface defects of the fiber surface increase due to hot corrosion, which reduces the mechanical properties of the fabric. The breaking strength, elongation at break, elastic modulus and strength limit of Al2O3 fabric at 1300 °C were 0.318 kN/cm, 9.108%, 319 MPa, 51.1 MPa (plain) and 0.412 kN/cm, 3.356%, 720 MPa, 58.44 MPa (twill), respectively. Due to the different forms of fabric structure, warp yarns exhibit varying degrees of buckling. Under the action of tensile load, the warp yarn is from buckling to straightening, so that the stress–strain relationship of Al2O3 fabric has nonlinear characteristics. The nonlinear Ogden model can well simulate the deformation process of Al2O3 fabric under high-temperature heat flow.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
