Documents published in Scipedia

• D3.2 (WP3): Adaptation of the training material

  B. Diep, C. García, E. Sanz

  prodPhD OA (2023). 1

  
  

  Abstract

  This document presents the trained material IPAG has adapted from its existing material following the needs and expectations collected and analysed by WP1 and the specifications of WP3’s task T3.1. The overall goal of the adapted training material is to provide PhD students with the necessary and sufficient knowledge and skills to reflect on entrepreneurship and possible start and run their business, be they aspiring or confirming entrepreneurs. The different courses are therefore designed to allow them to tackle each of the business model template widely used to design businesses in terms of offering, customers, infrastructure and finances. That represent ten hard skills to be addressed. In addition, seven soft skills deemed as crucial for business success are proposed. All the materials will be proposed under PowerPoint format.

  Abstract
  This document presents the trained material IPAG has adapted from its existing material following the needs and expectations collected and analysed by WP1 and the specifications [...]

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• Influence of boundary conditions on oxygen distribution in an organ-on-a-chip platform

  V. Carvalho, N. Rodrigues, R. Rodrigues, M. Bañobre, R. Lima, S. Teixeira

  eccomas2022.

  
  

  Abstract

  Organ-on-a-chip (OoC) platforms have revolutionized the drug development process by offering an effective alternative to animal models. These advanced microfluidic platforms mimic the organ functions at a microscale, and they can be produced at a large scale and at a lower price. Despite the variety of OoC models developed up to now, the combination of numerical simulations with experimental procedures has been of paramount importance in the development of more realistic and effective OoC devices. In addition, a better understanding of the physical phenomena happening in OoC can be obtained. In the present work, fluid flow numerical simulations were carried out in an OoC aiming to evaluate the influence of imposing different inlet velocities on the oxygen distribution along the device. This is of great importance to understand if the oxygen that reaches the cells is adequate for their culture. The results showed that for the geometry tested, with four organ models in parallel, by increasing the inlet velocity, the dissolved oxygen where cells are cultured also increases. This proves the importance of using numerical simulations for improving the performance of the experimental tests and optimizing the flow conditions. 

  Abstract
  Organ-on-a-chip (OoC) platforms have revolutionized the drug development process by offering an effective alternative to animal models. These advanced microfluidic platforms [...]

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• A method for communication between user materials during runtime in ABAQUS®

  P. Rose, L. Münch, M. Linke, P. Middendorf

  eccomas2022.

  
  

  Abstract

  The application of the Finite Element Method (FEM) has developed considerably in recent decades. While in the early days of the FEM only linear-elastic material models were available in commercial Finite Element (FE) programs, today non-linear and also damage-considering material models are offered. But even these are often not capable of correctly representing the complex material behaviour of modern composite materials. Therefore, FE programs often provide the users with the option of integrating their own material models into the simulation. These programs, often called "user subroutines" or "user materials", represent an intensively researched area in the simulation of material behaviour, which is reflected in the large number of publications on such developments (exemplarily see [1-14]). These material models often require a large amount of data values if they are introduced within the simulation model by finite elements [2]. Especially in the field of composites there is a need to use a separate "user material" for each constituent material. Since there is a mutual interaction between the components in real composites, it is obvious that this interaction must also be represented The 8th European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS Congress 2022 5 – 9 June 2022, Oslo, Norway PHILIP F. ROSE, LUKAS MÜNCH, MARKUS LINKE AND PETER MIDDENDORF 2 between the material models within a simulation in order to make accurate predictions about the material behaviour. To enable such an interaction between different material models in a simulation, a communication during runtime is required in which additionally needed data from the surrounding elements is exchanged between the user materials. In this paper, a method is presented to enable such information exchange during simulation runtime in the commercial FE software ABAQUS/CAE 2019 (Dassault Systèmes, Vélizy-Villacoublay, France) using external databases as well as structured global arrays and some built-in functions of the software. This allows the simultaneous application of several advanced user material models within one simulation and enable them to communicate during runtime, resulting in the possibility of making high accurate simulations of composite materials.

  Abstract
  The application of the Finite Element Method (FEM) has developed considerably in recent decades. While in the early days of the FEM only linear-elastic material models were [...]

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• Impact performance of out of die UV cured pultruded profiles for vessel structures

  I. Eguino, I. Saenz-Dominguez, I. Tena, A. Arruti, M. Sarrionandia, J. Aurrekoetxea

  This presentation was made at the 20th European Conference on Composite Materials (ECCM20) on 29 June 2022.

  
  

  Abstract

  The main objective of FIBRE4YARDS project is to maintain European global leadership in ship building and ship maintenance, through implementation of the Shipyard 4.0 concept in which advanced and innovative FRP manufacturing technologies are successfully introduced. This project has received funding from European Union's Horizon 2020 research and innovation programme under grant agreement n°101006860.

  Abstract
  The main objective of FIBRE4YARDS project is to maintain European global leadership in ship building and ship maintenance, through implementation of the Shipyard 4.0 concept [...]

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• On the existence of compression-only discrete force networks that support assigned sets of nodal forces

  A. Amendola, O. Mattei, A. Fortunato, P. Seppecher, F. Fraternali, G. Milton

  eccomas2022.

  
  

  Abstract

  We formulate a linear programming approach to the limit analysis of discrete element models of masonry structures. Numerical results show the ability of the given procedure to predict the limit value of the multiplier of variable horizontal forces, which are applied to masonry walls in association with a fixed vertical loading.

  Abstract
  We formulate a linear programming approach to the limit analysis of discrete element models of masonry structures. Numerical results show the ability of the given procedure [...]

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• Intelligent Initiatives to Reduce CO2 Emissions in Construction

  L. Farahzadi, M. Kioumarsi

  eccomas2022.

  
  

  Abstract
  Global warming is one of the most important environmental issues that threatens the living on this globe so far.

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• Seismic performance of dissipative automated rack supported warehouses

  A. Natali, F. Morelli

  eccomas2022.

  
  

  Abstract

  In this paper, performance of dissipative reduced-section diagonals implemented in Automated Rack Supported Warehouses (ARSWs) is analysed. ARSWs are storage systems where the steel racks traditionally used to store goods only, constitute also the primary system of the building. Given the lack of a reference design code to design these structures as seismicresistant, and starting from a critical analysis of the current design approaches, a proper design strategy for these structures has been developed, which is based on the possibility to dissipate seismic energy in the bracings. However, the design of an over-resistant connection that would allow the yielding of the bracings is quite tricky due to the very low thickness of the elements usually adopted for these structures and is only possible by reducing the cross section of the profile. A wide experimental campaign is preformed to validate the behaviour of these diagonals, to be later implemented in the global numerical model of the structure to measure the effective performances of the case study ARSWs, both at local and global level.

  Abstract
  In this paper, performance of dissipative reduced-section diagonals implemented in Automated Rack Supported Warehouses (ARSWs) is analysed. ARSWs are storage systems where [...]

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• Seismic performance of an innovative dissipative replaceable components bracing steel frame (DRBrC)

  S. Caprili, F. Mattei, W. Salvatore

  eccomas2022.

  
  

  Abstract

  The structural performance of a steel Concentrically Braced Frame (CBF) equipped with replaceable dissipative seismic components, called DRBrC, is presented. X-diagonal CBFs are an efficient structural solution for buildings in seismic prone areas, being conceived to dissipate the energy stored during the earthquake through plastic deformation of bracing elements; all the other components remain in the elastic field thanks to opportune design criteria. Of course, structural damages, even if voluntarily located in specific regions, need to be repaired after the seismic event to restore the functionality of the building, leading to relevant economic (and time) effort since the full replacement of damaged dissipative components is necessary after irreversible plastic deformations. Recently, research activities have been widely carried out to provide repairability of steel buildings by means of easily replaceable dissipative components. The Research Fund for Coal and Steel (RFCS) of European Commission, for instance, promoted and funded the research project DISSIPABLE Fully dissipative and easily reparable device for resilient buildings with composite steel-concrete structure', with the aim of designing, producing, optimizing and testing several dissipative components for steel structures having, as fundamental feature, the full repairability after the earthquake without impacting on other components. In the present paper, the seismic performance of a steel braced frame equipped with a specific typology of dissipative replaceable device at the ends of braces is presented by means of nonlinear analyses.

  Abstract
  The structural performance of a steel Concentrically Braced Frame (CBF) equipped with replaceable dissipative seismic components, called DRBrC, is presented. X-diagonal CBFs [...]

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• Comparing three calculation methods of load distribution in radial bearings

  M. Ricci

  eccomas2022.

  
  

  Abstract

  There are two basic methods for radial external load distribution calculation on rolling elements in a rolling element bearing: the discrete method and the integral method. Solving the discrete equilibrium equation using the Newton-Raphson scheme, more accurate results are derived than those based on the integral method, with small theoretical and computational efforts. The Sjövall's radial integral factors, as well as some approximations proposed in the literature, for lineand point-contacts, are given. Numerical approximations for the Sjövall's radial integrals are proposed. The approximations' errors with respect to the Sjövall's radial integral's numerical integration are shown.

  Abstract
  There are two basic methods for radial external load distribution calculation on rolling elements in a rolling element bearing: the discrete method and the integral method. [...]

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• Investigation of parameter-dependent material characteristics of additively manufactured specimens for data-driven part optimization

  D. Zettel, P. Breitkopf, P. Nicolay, R. Willmann

  eccomas2022.

  
  

  Abstract

  Direct Metal Laser Sintering (DMLS) is a complex production process including hosts of parameters and a multitude of physical phenomena, which make the simulation and modeling quite challenging. This work investigates the impact of modified printing parameters (e.g., hatch distance, laser power) on correlating material properties (e.g., Young's modulus, temperature gradient) of hardened aluminum specimens. The ultimate goal is to create a data model that enables data-driven and multi-physical optimization of mechanical components fabricated via DMLS.

  Abstract
  Direct Metal Laser Sintering (DMLS) is a complex production process including hosts of parameters and a multitude of physical phenomena, which make the simulation and modeling [...]

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