Abstract
While analyzing the safety of nuclear plants, special attention should be paid to the problem of projectile impacts on certain structures. In some cases, the strains undergone by these structures can be important enough to perforate them. The Finite Element Method is a well suited tool to take into account the complexity of the geometries, the non linear behaviour laws, the contact modelling in the study of such problems. The Lagrangian algorithm is in its essence relatively simple and well suited for impact problems between solids. But it has drawbacks when the mesh is subject to large deformations and distorsions. One or various remeshing are thus required during the computation. The Eulerian or Euler-Lagrange formulation helps avoid these large distorsions but is more difficult to set up and present difficulties when the boundary conditions are of Lagrangian kind (for example a free surface). To solve these problems frequently encountered during collision between two structures, a new algorithm was developed in the PLEXUS code of Castem system: this algorithm enables to treat solid/solid or solid/fluid contacts, using for one body an updated lagrangian formulation, the other one being represented by a `marble cluster` the cohesion of which is ensured by an
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Citation Formats
Bung, H, Galon, P, Lepareux, M, and Combescure, A.
A new method for the treatment of impact and penetration problems.
France: N. p.,
1993.
Web.
Bung, H, Galon, P, Lepareux, M, & Combescure, A.
A new method for the treatment of impact and penetration problems.
France.
Bung, H, Galon, P, Lepareux, M, and Combescure, A.
1993.
"A new method for the treatment of impact and penetration problems."
France.
@misc{etde_10123283,
title = {A new method for the treatment of impact and penetration problems}
author = {Bung, H, Galon, P, Lepareux, M, and Combescure, A}
abstractNote = {While analyzing the safety of nuclear plants, special attention should be paid to the problem of projectile impacts on certain structures. In some cases, the strains undergone by these structures can be important enough to perforate them. The Finite Element Method is a well suited tool to take into account the complexity of the geometries, the non linear behaviour laws, the contact modelling in the study of such problems. The Lagrangian algorithm is in its essence relatively simple and well suited for impact problems between solids. But it has drawbacks when the mesh is subject to large deformations and distorsions. One or various remeshing are thus required during the computation. The Eulerian or Euler-Lagrange formulation helps avoid these large distorsions but is more difficult to set up and present difficulties when the boundary conditions are of Lagrangian kind (for example a free surface). To solve these problems frequently encountered during collision between two structures, a new algorithm was developed in the PLEXUS code of Castem system: this algorithm enables to treat solid/solid or solid/fluid contacts, using for one body an updated lagrangian formulation, the other one being represented by a `marble cluster` the cohesion of which is ensured by an interaction law acting on the cluster particles. The motion of the different particles is no longer hindered by the mesh distorsion: the marble connectivity is calculated throughout the computation according to the local state of the structure.}
place = {France}
year = {1993}
month = {Dec}
}
title = {A new method for the treatment of impact and penetration problems}
author = {Bung, H, Galon, P, Lepareux, M, and Combescure, A}
abstractNote = {While analyzing the safety of nuclear plants, special attention should be paid to the problem of projectile impacts on certain structures. In some cases, the strains undergone by these structures can be important enough to perforate them. The Finite Element Method is a well suited tool to take into account the complexity of the geometries, the non linear behaviour laws, the contact modelling in the study of such problems. The Lagrangian algorithm is in its essence relatively simple and well suited for impact problems between solids. But it has drawbacks when the mesh is subject to large deformations and distorsions. One or various remeshing are thus required during the computation. The Eulerian or Euler-Lagrange formulation helps avoid these large distorsions but is more difficult to set up and present difficulties when the boundary conditions are of Lagrangian kind (for example a free surface). To solve these problems frequently encountered during collision between two structures, a new algorithm was developed in the PLEXUS code of Castem system: this algorithm enables to treat solid/solid or solid/fluid contacts, using for one body an updated lagrangian formulation, the other one being represented by a `marble cluster` the cohesion of which is ensured by an interaction law acting on the cluster particles. The motion of the different particles is no longer hindered by the mesh distorsion: the marble connectivity is calculated throughout the computation according to the local state of the structure.}
place = {France}
year = {1993}
month = {Dec}
}