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Showing 1 to 10 of 10 for “"threshold strain"”.
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Development of the Strain-To-Fracture Test to Study Ductility-Dip Cracking in Austenitic Alloys
The strain to fracture test has been developed as a robust testing technique for ductility-dip cracking (DDC) and other elevated temperature cracking phenomenon. Samples are tested over a range of temperature and strain, producing temperature-strain cracking envelopes. Threshold strain for fracture …
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Investigation of Weldability in High-Cr Ni-base Filler Metals
… from alloy 52MSS in the new molds. A decrease in strain rate most likely accompanies the decrease in cooling rate which would allow increased time for the flow of fluid to enable crack healing in alloys which exhibit a sufficient fraction eutectic. The solidification cracking susceptibility in the …
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A Quantitative Study of the Weldability of Inconel 718 Using Gleeble and Varestraint Test Methods
… and compared to Haynes 230 using Gleeble and Varestraint mechanical test methods. Hot cracking susceptibility was examined in either alloy using a sub-scale Varestraint test method at 5 augmented strain levels: 0.25%, 05.%, 1%, 2%, and 4%. Maximum crack length, total crack length, and number of …
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Piezo-induced fatigue of solder joints
… results are derived for the plastic shear strain at the free edges of such a specimen using a shear lag model. Results are also presented for the strain energy release rate for steady state crack growth. Experimental results and observations are presented for the damage processes in …
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Influence of some particle characteristics on the small strain response of granular materials
The key parameters representing the small strain response of geomaterials are the very small strain shear modulus, Gmax, shear modulus degradation G/Gmax, and damping ratio. These are also important parameters in the design of foundations where only small deformation takes place. A review of the …
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Assessment of the Cyclic Strain Approach for the Evaluation of Initial Liquefaction
… evaluation procedures include the stress-based, strain-based, and energybased based approaches. The existence of a volumetric threshold shear strain, γtv, under which there is no development of excess pore pressures, and the unique relationship between pore pressure ratio and cyclic shear strain, …
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Rate Effects in Fine Grained Soils
The strain rate dependent behaviour of fine grained soils is an important aspect of geotechnical engineering. During dynamic or rapid events such as earthquakes and rapid pile testing, a fine grained soil will display significantly different behaviour than may be observed over the long life span of …
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Reactive infiltration processing and compression creep of NiAl and NiAl composites
… were also captured. Composite primary creep strains were predicted to be significant at high applied composite stresses and for high fiber volume fraction composites, while the composite primary time was uniquely related to the composite steady-state creep-rate by a power-law at a given …
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Multiscale characterization of mechanochemical reactions in mechanophore-crosslinked polymers under shear loading
… fluorescence imaging is used to determine the threshold stress and strain required for activation as a function of strain rate and polymer architecture, both of which have a significant effect on mechanochemical activity of spiropyran in the bulk polymer. Increasing the strain rate leads to an …
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Nonlinear macroscopic description of liquid crystalline elastomers in external fields
… material. This leads to compressive and dilative strain deformations. Finally, we study the specific stress-strain behavior of nematic SCLSCEs. It has been found for nematic SCLSCEs stretched perpendicularly to the initial director orientation that their director reorients towards the stretching …