Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"essential work of fracture"”.
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Morphological properties of poly (ethylene terephthalate) (PET) nanocomposites in relation to fracture toughness.
The effect of incorporation of montmorillonite layered silicate (MLS) on poly (ethylene terephthalate) (PET) matrix was investigated. MLS was added in varying concentration of 1 to 5 weight percent in the PET matrix. DSC and polarized optical microscopy were used to determine the crystallization …
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The steady-state work density gradient: A new parameter and strategies for characterizing crack propagation in thin ductile sheets
… for characterizing the crack growth resistance of thin ductile sheets: the steady-state work density gradient. The steady-state work density gradient describes the stress necessary to drive crack propagation in the late stages of mode I crack growth as the crack tip approaches a specimen edge …
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Viscoelastic and fracture behaviour of polyolefin based nanocomposites
… it has been widely proven that the introduction of very small amounts of inorganic nanoparticles in polymeric matrices can lead to noticeable improvements of their mechanical properties, in terms of elastic modulus and tensile properties at yield and at break. Linear low density polyethylene …
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Morphologie und Bruchverhalten von Block- und Multipfropfcopolymeren
… Untersuchungen erfolgten unter Anwendung der „Essential Work of Fracture“- (EWF-) Methode, welche als Konzept der „Post-Yield“-Bruchmechanik innerhalb der Fließbruchmechanik für duktile nanostrukturierte polymere Materialien sehr gut anwendbar ist und Aussagen zur Bruchzähigkeit der Materialien …
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Preparation and properties of micro- and nanocomposites based on high density polyethylene
The primary objectives of this thesis were to investigate and compare the fracture and creep behaviour of micro- and nanocomposites based on polyethylene (PE) produced by melt mixing. To achieve these objectives, different fillers were considered: micrometric copper particles, nanometric carbon …