Multiscale and Multiphysics Computational Mechanics

Laboratory

Multiscale and Multiphysics Computational Mechanics

Multiscale and Multiphysics Computational Mechanics Lab aims at developing novel design methodologies and theories in order to simulate various problems based on the demands of automotive, aerospace and defense industries. Main focus is placed on key areas of fiber reinforced composites and additively manufactured metals.

 

Variable stiffness composite design: involves development of a novel method to find optimum fiber angles at each ply of a composite laminate for any given load case.

 

Figure 1 Fiber angles for of a fixed plate having  with a uniform pressure load for minimum compliance.

 

 

Crystal plasticity finite element method and its applications: primary focus is on modeling of mechanical behavior of additively manufactured metals with intense morphological and crystallographic texture. The crystal plasticity tools developed in this field targets metal forming applications of automotive and aerospace industry.

 

Figure 2 Crystal plasticity finite element modeling of a polycrystal aluminum.

 

 

Computational Fluid Dynamics:

Inverse finite element method (iFEM): Involves development of robust and efficient iFEM methodologies to perform real-time monitoring of full-field and three-dimensional structural deformations and stress states of a structure via a network of in situ strain sensors. This field of research is essential for structural health monitoring of any type of material/structures including fiber reinforced composite materials and sandwich structures.

 

 

 Figure 3 (a) The iFEM Methogology (b) Real-time displacements of a stiffened cylinder

 

 

Refined zigzag theory (RZT): Investigates modelling and development of structural design algorithms based on RZT for finite element analysis of thin/thick composite and/or sandwich beams/plates/shells. The RZT takes into consideration the discrete nature of individual laminae as well as the varying stiffness properties of the core, thus represents a viable, computationally efficient, and highly accurate single-layer theory.

 

 

Figure 4 Structural analysis of a curved cracked panel.

 

 

Isogeometric analysis (IGA): Involves development of various IGA-based computational frameworks for performing structural analysis of complex and curved geometries such as marine propellers, rims, wave energy devices, aerospace wing models, and wind turbine blades. The IGA serves an exact representation of computational geometry no matter how coarse the discretization, provides high order continuity basis functions, and finally knits the mesh generation process within CAD systems.

 

Figure 5 Isogeometric analysis of a sinusoidal plate.

 

 

Impact / high strain rate problems: Design of impact resistant fiber reinforced composite panels for automotive, aerospace and defense industry.

 

Figure 6 High strain rate testing and characterization of materials at high deformation rates.

 

 

Crashworthiness: Investigates on crash performance of composite and metallic materials for transportation safety research mainly for automotive and aerospace industries.

 

Figure 7 Crashworthiness analysis for transportation safety problems.

 

 

High Performance Computing Center (HPC) that is established within Sabancı University Integrated Manufacturing Technologies Research and Application Center (SU-IMC), considering the needs for computational mechanics, simulation-based engineering science, material science, big-data and image processing, data analytics, artificial intelligence, augmented and virtual reality, deep-learning, numerical methods, parallel high- performance programming and programming languages, optimization, user interfaces and human- computer-robot interaction, Internet-of-Things, and the applications requiring high computational power such as industry 4.0 practices.

Named after TULPAR (@tulpar), a mythological being, known for its wisdom, conscience, strength and speed, the system will serve as baseline for an ever-growing infrastructure hosting both CPUs and GPUs supported with infiniband network technology.

 

 

OUTPUTS

In Computational Mechanics Laboratory novel modeling tools for a wide variety of problems including variable stiffness design of composite structures to metal additive modeling have been developed. The lab offers simulation services to wide variety of industrial problems including static design cases to dynamic crash simulations that could be achieved by using various commercially available software based on customers needs. A detailed report of the results including important conclusions of the simulations such as critical constraints, improvements on the design will be presented as the major output.  To sum up, the outputs of the lab include model development, simulation services, and an analysis report.

 

 

TARGET SECTORS/AREAS

  • Automotive
  • Aerospace
  • Railway
  • Marine
  • Aeronautics and Astronautics
  • Defense industries
  • Energy

 

 

EQUIPMENTS

  • HP Z840 Workstation (x1)
  • Intel Xeon E5-2650v4 2.2 2400 12C 1stCPU
  • Intel Xeon E5-2650v4 2.2 2400 12C 2ndCPU
  • 256GB DDR4-2400 (16x16GB) 2CPU RegRAM