Energy absorption of aluminum panels subjected to gelatin projectile impact
AUTOR(ES)
Li, D.
FONTE
Lat. Am. j. solids struct.
DATA DE PUBLICAÇÃO
29/07/2019
RESUMO
Abstract Digital image correlation (DIC) method has been widely used on dynamical experiments. This full-field and real-time method can fill in the gap of traditional point-based measurements of typical structures subjected to soft body impact such as bird strike. In order to get further understandings of soft body impact process, the present study analyzed the time-dependent energy exchange during impact experiments. The dynamic responses of the aluminum target panels were obtained using 3D digital image correlation method so that their displacement and strain field histories can be tracked. By introducing the material properties of the targets, their time-dependent stress state and consequently the strain energy can be calculated. With the help of time-dependent profiles of target panels, their energy absorption properties were theoretically analyzed, including the exchange of kinetic energy and plastic work. The results showed that when the impact loadings were increased, the plastic work generated by radial membrane force became the major source of energy dissipation. The transverse movements consumed more kinetic energies than rotatory moments. This research may provide a further application of DIC results and help to better understand the soft body impact process on targets with large deformations.
Documentos Relacionados
- Numerical Study on the Projectile Impact Resistance of Multi-Layer Sandwich Panels with Cellular Cores
- Stacking sequence optimisation of composite panels subjected to slamming impact loads using a genetic algorithm
- High Order Impact Elastic Analysis of Circular Thick Cylindrical Sandwich Panels Subjected to Multi-mass Impacts
- Experimental study of impact energy absorption in aluminium square tubes with thermal triggers
- Improved high-order bending analysis of double curved sandwich panels subjected to multiple loading conditions