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.
Results
Showing 1 to 8 of 8 for “"slow crack growth"”.
-
Slow crack growth and associated plastic deformation in linear medium-density polyethylene
Since the introduction of polyethylene (PE) pipe for use in natural gas distribution about twenty years ago, nearly one billion feet of various grades have been installed in North America. Now more than 80% of all pipe installed for natural gas distribution is made of PE, and this percentage is …
-
Hydrogen Transport and Hydrogen Embrittlement in Stainless Steels (Diffusion, Permeation, Solubility, Slow Crack Growth)
… the kinetics of gaseous hydrogen-induced slow crack growth (SCG) in metastable austenitic stainless steels, hydrogen permeation and/or cracking velocity were measured and compared for three types of stainless steels. These included austenitic, ferritic, and duplex ((gamma)/(alpha)) alloys. …
-
High temperature fatigue and creep deformation behavior under static and cyclic loading in ceramics containing a viscous grain boundary phase
… At high stresses, fracture was dictated by slow growth of a single dominant flaw along the grain boundaries; at low stresses fracture occurred due to the nucleation, growth and linkage of multiple macrocracks. In the stress range used in the fatigue experiments, fracture under cyclic loading …
-
An assessment of the fracture toughness of two cast and wrought stainless steels
The crack-tip displacement concept has been applied to austenitic steels at 25°C and in the temperature range 400-800°C. The measurement of a maximum load crack-tip displacement in a notch bend test, provided a good indication of fracture-toughness since it included a portion of slot: crack-growth. …
-
Life prediction of fiber-reinforced composites: macro- and micro-mechanical modeling
… is controlled by damage associated with a single crack while that of non-homogenous materials is the result of a distributed damage state. The life prediction of composite materials is thus carried out using damage mechanics two common approaches of which are, macro- and micro-mechanical modeling. …
-
The Ductile to Brittle Transition in Polycarbonate
… two different critical energies per unit area of crack growth exist in glassy polymers. A higher energy state is associated with ductile failure (slow crack growth), while a lower energy state is associated with brittle failure (fast crack growth). The model is formulated so that as rate or stress …
-
Mechanics and subcritical cracking of FRP-concrete interface
… for the FRP-strengthened RC beams. Small cracks usually exist within the FRP-concrete interface, making fracture mechanics a more appropriate tool to evaluate the integrity of the FRP-concrete interface. Analytical solutions of energy release rate (ERR) and its phase angle at the tip of a …
-
Lomové chování trubkových polyolefinů
Práce se zabývá studiem lomového chování trubkových typů vysokohustotního polyetylénu (HDPE). V první části byla provedena podrobná studie současného stavu poznání. Byla zaměřena na používané typy plastů pro trubkové aplikace, mezní stavy plastových trubek a klíčové parametry ovlivňující lomové …