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Showing 1 to 20 of 121 for “"strain induced"”.
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Strain-induced crystallization of crosslinked polyethylene
The kinetics of strain-induced crystallization of ultra high molecular weight polyethylene (UHMWPE) in both the dry and swollen states have been studied using a digital imaging technique coupled with dynamometry. Polymer fibers obtained by spinning a gel of polyethylene in paraffin oil were lightly …
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Mechanochromism and Strain-Induced Crystallization in Thiol-yne-derived Stereoelastomers
<p>Most elastomers undergo strain-induced crystallization (SIC) under tension; as individual chains are held rigidly in a fixed position by an applied strain, their alignment along the strain field results in a shift from strain-hardening (SH) to SIC, a sub-type of SH. A similar degree of …
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Strain induced mobility enhancement in monolayer two dimensional molybdenum disulfide
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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Mechanics of strain-induced transformation toughening in metastable austenitic steels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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The mechanics of strain-induced crystallization in poly(ethylene terephthalate)
… PET exhibits the capability of undergoing strain-induced crystallization during processing, the result of which is increased stiffness and hardness as well as better dimensional stability. An experimental study of the strain rate, strain state, and temperature dependencies of the …
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Strain-induced self-rolled-up semiconductor micro/nanotubes: Fabrication and characterization
Strain-induced self-rolled-up semiconductor nanotubes are a new type of building block for three-dimensional architectures. Semiconductor nanotubes (SNTs) take advantage of the lattice mismatch between different layers and are formed when the strained semiconductor layers are released from the …
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Engineering strain-induced self-rolling semiconductor tubes through geometry and patterning
… investigates the effect of the geometry of the strained bilayer mesa on the physical shape of semiconductor nanotubes, which is essential for precise positioning and uniform large area assembly. Experimental and simulation results of the rolling behavior of tubes are discussed for various …
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Measurement dynamic strain induced by balloon-expandable endovascular stents in arterial walls
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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The Effects of Strain Induced Softening on the Load Carrying Capability of Components
… strength in a few hundred cycles at post yield strain ranges. In most practical instances, though, significant stress reversals in components only occur in localized regions, suggesting that the use of the enhanced strength characteristics would be acceptable.
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Overcoming the limits of strain-induced martensitic transformation in metastable face-centered cubic alloys
… phase transformations activated by plastic straining are considered as one of the most effective pathways to promote strength while preserving desirable ductility. The resultant transformation-induced plasticity effect has enabled great success in advancing steels, titanium alloys, and more …
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Optical Studies of Iii-V Quantum Wires Grown by Strain-Induced Lateral Ordering (Silo) Process
A characterization technique is developed to estimate the extent and shape of the spontaneously created composition modulation. The technique, based on resonant Raman spectroscopy, is general and can be utilized to map out composition regions in any semiconductor microstructure. Computer …
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Optical studies of III-V quantum wires grown by strain induced lateral ordering (SILO) process
… to carefully study the quantum wires grown via strain induced lateral ordering (SILO) which is a bulk thermodynamics driven self-ordering process. Fourier transform photoluminescence (FTPL) measurements have been employed to study the polarization anisotropy in the emission from these …
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Polymer structure and property studies in elongational rheology, spherulite deformation, and biaxial strain induced crystallization
… and immiscible at 120,000 molecular weight. Strain hardening and the level of strain induced crystallization which occurred in the biaxial deformation of poly(lactic acid) blend films were found to be contingent on the concentration of optically active poly(L-lactic acid). Temperature, …
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Fabrication of quantum wire heterostructures and short wavelength photonic devices using the strain-induced lateral-layer ordering process
Research is currently underway on a variety of approaches to improve semiconductor laser performance. The use of quantum size effects has been studied for over 25 years. It has been predicted and shown that the incorporation of one-dimensionally confined quantum wells into laser devices can …
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Experimental investigation and constitutive modeling of the large deformation behavior of anisotropic steel sheets undergoing strain-induced phase transformation
The strain-induced phase transformation from austenite to martensite is responsible for the high strength and ductility of TRansformation-Induced Plasticity (TRIP)- assisted steels. The large deformation behavior of conventional steels is governed by crystallographic slip. In the case of TRIP …
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Investigating Mechanical Strain-Induced Phenotypic Changes on Prostate Cancer Cell Toward Metastasis Using a Three-Dimensional <i>In-Vitro</i> Model
… <i>in-vitro</i> model to investigate mechanical strain-induced phenotypic changes in prostate cancer (PC3) cells, progressing cells toward metastasis. A novel mechanical loading platform, the UNIcycler, was developed to apply 1% uniaxial stretch to 3D collagen encapsulated PC3 constructs. In this …
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Characterization of Stresses and Strains Involved in the Martensitic Phase Transformations
Transformation-induced plasticity (TRIP) steels are an example of steels used in the automotive industry, where strain-induced martensitic transformations, associated plasticity and work hardening, enhance both the strength and ductility of the material. This has enhanced both the passenger safety …
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Indium Gallium Arsenide-Gallium Arsenide-Aluminum Gallium Arsenide Strained-Layer Lasers and Laser Arrays
… separate confinement heterostructure strained-layer quantum well lasers are investigated in this work. The main implications of strain are examined briefly, including the importance of a critical layer thickness, strain-induced changes of the band structure, and their effects on laser …
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Elastocaloric properties of Natural Rubber for Solid-State Cooling Technologies
… synergistic contribution of thermoelasticity and strain-induced crystallization. Nevertheless, research on the refrigeration potential of natural rubber is still in its infancy, and not all parameters influencing the elastocaloric behaviour of this material are fully understood. In particular, …
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Concentric-core optical fiber sensors
… describes the implementation of a mechanical strain sensor which uses concentric core optical fiber waveguide as the sensing element. When this particular type of fiber is strained, a transfer of optical power occurs between propagating modes in the two concentric cylindrical cores of the …
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