The following information was submitted:
Transactions: INTERNATIONAL JOURNAL of MATHEMATICS AND COMPUTERS IN SIMULATION
Transactions ID Number: 19-822
Full Name: Ricardo Simoes
Position: Professor
Age: ON
Sex: Male
Address: Institute for Polymers and Composites, Campus de Azurem, 4800-058 Guimaraes
Country: PORTUGAL
Tel: 253510320
Tel prefix: 351
Fax: 253510339
E-mail address: rsimoes@dep.uminho.pt
Other E-mails: rsimoes@ipca.pt
Title of the Paper: Estimating local part thickness in midplane meshes for finite element analysis
Authors as they appear in the Paper: Vanio Ferreira, Luis Paulo Santos, Markus Franzen, Omar O. Ghouati, Ricardo Simoes
Email addresses of all the authors: rsimoes@dep.uminho.pt
Number of paper pages: 8
Abstract: Within the development of motor vehicles, crash safety (e.g. occupant protection, pedestrian protection, low speed damageability), is one of the most important attributes. In order to be able to fulfill the increased requirements in the framework of shorter cycle times and rising pressure to reduce costs, car manufacturers keep intensifying the use of virtual development tools such as those in the domain of Computer Aided Engineering (CAE). For crash simulations, the explicit finite element method (FEM) is applied. The accuracy of the simulation process is highly dependent on the accuracy of the simulation model, including the midplane mesh. One of the roughest approximations typically made is the actual part thickness which, in reality, can vary locally. However, almost always a constant thickness value is defined throughout the entire part due to complexity reasons. On the other hand, for precise fracture analysis within FEM, the correct thickness consideration i!
s one key enabler. Thus, availability of per element thickness information, which does not exist explicitly in the FEM model, can significantly contribute to an improved crash simulation quality, especially regarding fracture prediction. Even though the thickness is not explicitly available from the FEM model, it can be inferred from the original CAD geometric model through geometric calculations. This paper proposes and compares two thickness estimation algorithms based on ray tracing and nearest neighbour 3D range searches. A systematic quantitative analysis of the accuracy of both algorithms is presented, as well as a thorough identification of particular geometric arrangements under which their accuracy can be compared. These results enable the identification of each technique's weaknesses and hint towards a new, integrated, approach to the problem that linearly combines the estimates produced by each algorithm.
Keywords: Automotive crash simulations, Structural modelling, Finite element analysis, Thickness estimation, Ray tracing
EXTENSION of the file: .pdf
Special (Invited) Session: Estimating Local Thickness for Finite Element Analysis
Organizer of the Session: 638-165
How Did you learn about congress: rui.soares@centimfe.com, chaves.filipe@fe.up.pt, amb@dep.uminho.pt, dmatos@ipca.pt, pontes@dep.uminho.pt
IP ADDRESS: 188.81.32.117
