Sökning: "Crack shapes"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Crack shapes.

1. 1. Adhesive modelling in multi-material structures : Evaluating the strength and fatigue life of adhesive joints

   Master-uppsats, Linköpings universitet/Mekanik och hållfasthetslära

   Författare :Nitin Narayanaswamy; [2020]
   Nyckelord :Adhesive Joints Strength Calculation J Integral Method Energy Release Rate Theory Crack Finite Element Analysis Multi Material Structures Automotive;

   Sammanfattning : Advancements in material science and manufacturing techniques are enabling the use of lightweight metal alloys and polymer composites in several combinations and shapes for producing more efficient and lightweight structures for automotive applications without compromising strength, stiffness and/or durability. When evaluating the strength of the structure, the joints are of importance. LÄS MER

3. 2. Finite element modelling of strained nanowire heterostructures

   Kandidat-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

   Författare :Alexander Grape Wyke; [2019]
   Nyckelord :Strain; nanowire; heterostructure; physics; nanophysics; COMSOL; simulation; lattice; Physics and Astronomy;

   Sammanfattning : When two materials with different lattice constants are grown together, this generates stress between them, and therefore strain. This strain causes them to have different thermal and electrical properties, and this is especially important on the nanoscale where changes have large impacts. LÄS MER

4. 3. Investigation of factors affecting cracking during forming of truck cab body parts

   Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

   Författare :Evelina Salomonsson; [2018]
   Nyckelord :;

   Sammanfattning : Sheet metal forming is a technique widely used in todays industries as it enables fast transformation of metal sheets into parts of various shapes and sizes. Volvo GTO EBM in Umeå uses sheet metal forming in their production of truck cab body parts, and a challenge common for all industries using this technique is to avoid cracking in the formed metal. LÄS MER

5. 4. Stress Analysis of Different Shaped Holes on a Packaging Material

   Master-uppsats, Blekinge Tekniska Högskola/Institutionen för maskinteknik

   Författare :Venkata Naga Sai Krishna Janardhan Parimi; Vamsi Eluri; [2016]
   Nyckelord :ABAQUS; Crack Initiation; EPFM; Geometric function; Hole shapes; LDPE; LEFM; Mode I tensile loading;

   Sammanfattning : In packaging industries, the demand for usage of Low Density Poly Ethylene foil is of profound interest. In the past, research was carried out on finite and infinite plates with varying crack lengths but having constant crack width. In this thesis, a detailed analysis on crack initiation is carried out on finite plates by varying width of the hole. LÄS MER

7. 5. Fracture Mechanical Trouser Taer Testing of thin polymer films

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Nasir Mehmood; Tan Mao; Gaurav Bhupati; [2012]
   Nyckelord :Key Words: PP; Mode I ; Mode III; Tensile test; ABAQUS simulation; Crack shapes; Tearing behavior; EWF; Polarized light; SEM microscope.;

   Sammanfattning : Tensile and Trouser tear tests of thin packaging polymer films have been done successfully in this research thesis. Two different polymers (PP and LDPE) are used. Mode I and Mode III fracture tests have been used for crack propagation analysis. Several experiments are performed to calculate the material parameters. LÄS MER