Sökning: "non-linear spring"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden non-linear spring.

  1. 1. Test Equipment for the LUCAS Chest Compression System: Incorporating Biomechanical Insights for Future Design Enhancements

    Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Ester Pörtfors; Malin Svärdling; [2024]
    Nyckelord :Mechanical CPR; Cardiopulmonary Resuscitation; LUCAS Chest Compression System; Test Equipment; Chest Biomechanics; Chest Stiffness; Technology and Engineering;

    Sammanfattning : The LUCAS Chest Compression System is a market leading mechanical cardiopulmonary resuscitation device, assisting medical professionals worldwide when treating patients with sudden cardiac arrest. The objective of this master thesis project was to develop a new, adjustable test equipment for the LUCAS device, allowing for tests on varying chest heights and stiffness levels. LÄS MER

  3. 2. CAE modelling of cast aluminium in automotive structures

    Master-uppsats, Linköpings universitet/Mekanik och hållfasthetslära

    Författare :Subrat Singh; Sreehari Veditherakal Shreedhara; [2019]
    Nyckelord :Material failure model; LS- Dyna; Non-linear Finite Element analysis; Cast aluminium; Explicit FEA; LS-DYNA; Drop tower; Spring tower; Strut Tower; FEM; CrachFEM; ANSA;

    Sammanfattning : In the automobile industry, there is a big push for the automotive car manufacturers to base engineering decisions on the results of Computer Aided Engineering (CAE) solutions, and to transform the prototyping and testing, from a costly iterative process to a final verification and validation step. The variability in components material properties and environmental conditions together with the lack of knowledge about the underlying physics of complex systems often make it impractical to make reliable predictions based on only deterministic CAE models. LÄS MER

  4. 3. Nytt fjäderkoncept för babysitter: progressiv styvhet genom icke-linjärt material

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Raphael Andreolli; Rickard Frumerie; [2019]
    Nyckelord :;

    Sammanfattning : I denna rapport användes beräkningsverktyget ANSYS tillsammans med stöd av experiment på prototyper för att ta fram ett nytt gungningskoncept till företaget BabyBjörns babysitter. Utmaningen låg i att försöka uppnå ett progressivt styvhetsbeteende hos konstruktionen och därmed minska gungningsfrekvenserna för större barn men samtidigt bevara gungningsfrekvenserna för mindre barn. LÄS MER

  5. 4. Non-Linear FE-Analysis of a Composite Action Girder with Coiled Spring Pins as Shear Connectors

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Simon Stahlin; [2019]
    Nyckelord :composite bridge; composite action; shear connector; coiled spring pins; finite element modeling; samverkansbro; samverkan; skjuvförbindare; spiralbult; finita element modellering;

    Sammanfattning : For bridges to cope with increased requirements such as increased loads, strengthening work can be carried out. In cases where older steel-concrete bridges do not have a composite action, an alternative is to create composite-action to achieve a higher flexural strength. It is introduced by post-installing shear connectors. LÄS MER

  7. 5. Advanced bushing script program in MSC ADAMS

    Master-uppsats, KTH/Fordonsdynamik

    Författare :Rahul Gowthaman; Suhail Jagwani; [2018]
    Nyckelord :MSC ADAMS Car; rubber bushing; Computer Aided Engineering; stiness; measured data; force hysteresis; dynamic loading;

    Sammanfattning : The thesis focuses on investigating and optimizing a bushing script implemented as a tool in MSC ADAMS/Car. The study provides an insight on the representation of a rubber bushing and identify parameters which can be used to define the properties of a bushing in a simulation environment such as ADAMS/Car. LÄS MER