Keywords: Finite element method, explicit form of FEM, FDM, dynamics of structures, high performance computing, distributed systems, cloud computing, GPGPU, computer network, TCP/IP, C/C++.

The latest trends in distributed computing in many industrial and scientific areas increasingly leads to the use of new capabilities which are now provided by cloud systems as a source of high performance hardware. It applies to processing of a big amount of data known under the name of ”Big Data”. The respective data are processed in a cloud system composed from a big amount of workstations suitably virtualized by the particular provider of a cloud system for example Amazon EC2/AWS, Microsoft Azure or Google Cloud Platform, respectively. The new technology of clouds is tightly interlinked with the use of so-called microservices which in a certain way is a rebranding the already known SOA (Service Oriented Application) often used in enterprise systems like PDM(Product DataManagement) or ERP (Enterprise Resource Planning). Aforementioned technologies are built on the computer network stack which is here the core for interprocess communication. Thus a similar system could be composed in a form of interconnected ordinary workstations, which is the usual state of computer equipment in many engineering offices. Such a system can then be capable to solve some special engineering issues.

The problems of impact of various bodies belongs to the set of engineering issues under the consideration. It is the case especially in automotive industry. This applies to numerical simulation of massive car crash tests. The respective process is usually driven by autonomous Lagrangian from a mathematical-physical point of view. This paper presents a distributed system. It is also capable to work in dynamically changing environment usually provided by the Internet.

The presented hybrid-parallel solver, the FEXP (Finite [E]lement [E]XPlicit), is based on the finite element method (FEM) and the explicit integration of equations of motion. It is the first version of this explicit FEM solver which is now provided as a new open-source project directly focused on distributed and high performance computing. In this paper the basic form of a hybrid-parallel computation algorithm is also presented. The core of this is the domainlevel decomposition method. Some important C++ codes and schemas are also contained in this paper. Finally the simulation test of the designed FEXP solver applied to structures assembled from shells is considered to be close to those from the automotive industry.

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