Blar i UiS Brage på forfatter "Regassa, Yohannes"

Viser treff 1-8 av 8

    • Bio-inspired design trends for sustainable energy structures 

      Regassa, Yohannes; Dabasa, T.; Amare, G.; Lemu, Hirpa G. (Peer reviewed; Journal article, 2023)
      Researchers and engineers are constantly looking to nature for design inspiration as they work to create novel and effective energy conversion structures. Engineers are developing durable and resilient materials to survive ...

    • Burst strength analysis of composite overwrapped pressure vessel using finite element method 

      Regassa, Yohannes; Lemu, Hirpa G.; Sirhabizu, Belete (Peer reviewed; Journal article, 2021)
      The purpose of this numerical study was to investigate the burst performance of a type III composite overwrapped pressure vessel (COPV) using finite element methods. An Aluminum overwrapped composites pressure vessel was ...

    • Composite Overwrapped Pressure Vessel Design Optimization Using Numerical Method 

      Regassa, Yohannes; Gari, Jema; Lemu, Hirpa Gelgele (Journal article; Peer reviewed, 2022-08-05)
      Composite Overwrapped Pressure Vessels (COPVs) are widely used in fields including aeronautics and by companies such as SpaceX to hold high pressure fluids. They are favored for these applications because they are far ...

    • Investigation of the mechanical properties of Acacia tortilis fiber reinforced natural composite 

      Dawit, Jonathan B.; Lemu, Hirpa Gelgele; Regassa, Yohannes; Akessa, Adugna Deressa (Peer reviewed; Journal article, 2020-10)
      The work presented in this paper is motivated by the fact that use of natural fiber materials for structural and non-structural applications have increased within the last two decades. In addition to the known benefits of ...

    • Literature review on thin-walled and cellular structure designs for energy absorption 

      Dabasa, Tamana; Lemu, Hirpa G.; Regassa, Yohannes (Peer reviewed; Journal article, 2023)
      Bio-inspired structure is a topic of immense interest to researchers worldwide. In order to maximize energy absorption through biomimetic structures, this article presents bio-inspired structure particularly, thin walled ...

    • Property characterization of acacia tortilis for natural fiber reinforced polymer composite 

      Dawit, Jonathan B.; Regassa, Yohannes; Lemu, Hirpa G. (Peer reviewed; Journal article, 2019-12)
      Eco-friendliness and availability of green fiber reinforced based composites attracted many as a potential replacement for non-biodegradable synthetic fiber. Green composites are biodegradable and less susceptible to health ...

    • Studies on the Geometrical Design of Spider Webs for Reinforced Composite Structures 

      Regassa, Yohannes; Lemu, Hirpa Gelgele; Sirabizuh, Belete; Rahimeto, Samuel (Peer reviewed; Journal article, 2021-02)
      Spider silk is an astonishingly tough biomaterial that consists almost entirely of large proteins. Studying the secrets behind the high strength nature of spider webs is very challenging due to their miniature size. In ...

    • Trends of using polymer composite materials in additive manufacturing 

      Regassa, Yohannes; Lemu, Hirpa G.; Sirabizuh, Belete (Peer reviewed; Journal article, 2019)
      Additive manufacturing (AM) technology is nowadays one of the advanced manufacturing technologies used to convert three dimensional product data to physical objects without any special tooling. The emergence of the technology ...