A numerical approach to evaluate temperature-dependent peridynamics damage model for destructive atmospheric entry of spacecraft

Abstract

The evaluation of the on-ground casualty risk assessments due to a controlled or uncontrolled re-entry is highly sensitive to the accurate prediction of fragmentation events during an atmospheric re-entry. The main objective of this study is an investigation into the use of peridynamics (PD) to improve the analysis of fragmentation during atmospheric re-entry with respect to currently adopted semi-empirical approaches. The high temperatures characterising such scenarios may substantially impact fragmentation, which requires appropriate modelling of the damage process within the PD method. The damage models in PD require experimentally determined fracture mechanical properties that are unavailable as a function of temperature. This work proposes a numerical methodology to estimate the PD damage parameters changes with temperature to enable the study of fragmentation during atmospheric re-entry. Initially, tensile-testing simulation experiments are performed in peridynamics to calibrate material parameters for steel and aluminium alloys as a function of temperature. Then, a parametric study is carried out to evaluate the temperature-dependent damage model parameters for the same materials. The applicability of the proposed methodology is showcased using a re-entry test case scenario.

Untitled

“…To simulate the behavior of debris entering the atmosphere by using peridynamics, the temperature parameters of steel and aluminum alloy were calibrated by the tensile test. A calculation method for estimating PD damage parameters as a function of temperature was proposed and verified by experiments [41]. Utilized the Lagrangian formalism to derive the governing equations of Dual Horizon PD formulation which is for thermal diffusion analysis (Figures 1&2).…”

Study on Damage and Failure Mechanism of Steel Structure Affected by Temperature

“…To simulate the behavior of debris entering the atmosphere by using peridynamics, the temperature parameters of steel and aluminum alloy were calibrated by the tensile test. A calculation method for estimating PD damage parameters as a function of temperature was proposed and verified by experiments [41]. Utilized the Lagrangian formalism to derive the governing equations of Dual Horizon PD formulation which is for thermal diffusion analysis (Figures 1&2).…”