Traumatic eye injuries as a result of blunt impact: computational issues

18th APS-SCCM; 24th AIRAPT

Clemente, C.^1 ; Esposito, L.^2 ; Bonora, N.^1,3 ; Limido, J.^4 ; Lacome, J.L.^4 ; Rossi, T.^5

Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino

I-03043, Italy^1

Pa.L.Mer. - Scientific and Technology Park of Southern Lazio, Ferentino

I-03013, Italy^2

Techdyn Engineering, Rome

I-00199, Italy^3

IMPETUS-AFEA, Grenade sur Garonne

F-31330, France^4

Ophthalmic Hospital of Rome, Rome

I-00136, Italy^5

关键词: Biological soft tissue;    Computational results;    Deformation and fracture;    Enucleated porcine eye;    Experimental investigations;    Non-linear finite elements;    Non-uniform rational B-splines;    Physical and mechanical properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/10/102003/pdf
DOI  :  10.1088/1742-6596/500/10/102003

来源: IOP

【 摘 要 】

The detachment or tearing of the retina in the human eye as a result of a collision is a phenomenon that occurs very often. Reliable numerical simulations of eye impact can be very useful tools to understand the physical mechanisms responsible for traumatic eye injuries accompanying blunt impact. The complexity and variability of the physical and mechanical properties of the biological materials, the lack of agreement on their related experimental data as well as the unsuitability of specific numerical codes and models are only some of the difficulties when dealing with this matter. All these challenging issues must be solved to obtain accurate numerical analyses involving dynamic behavior of biological soft tissues. To this purpose, a numerical and experimental investigation of the dynamic response of the eye during an impact event was performed. Numerical simulations were performed with IMPETUS-AFEA, a new general non-linear finite element (FE) software which offers non uniform rational B-splines (NURBS) FE technology for the simulation of large deformation and fracture in materials. IMPETUS code was selected in order to solve hourglass and locking problems typical of nearly incompressible materials like eye tissues. Computational results were compared with the experimental results on fresh enucleated porcine eyes impacted with airsoft pellets.