Internal stress storage in shape memory polymer nanocomposites
| Autor: | Yiping Liu, Ken Gall, Goran Stefanic, Davor Balzar, Martin L. Dunn |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
silicon compounds
filled polymers particle reinforced composites shape memory effects nanocomposites nanoparticles internal stresses stress-strain relations recovery lattice constants Shape-memory polymer Materials science Compressive strength Lattice constant stomatognathic system Physics and Astronomy (miscellaneous) Rietveld refinement Nanoparticle Compression (geology) Deformation (engineering) Composite material Dispersion (chemistry) |
| Zdroj: | Applied Physics Letters. 85:290-292 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.1769087 |
| Popis: | We examine the storage and release of internal stresses in shape memory polymers reinforced with a dispersion of nanometer-scale SiC particles. A quantitative Rietveld analysis of diffraction peaks was used to measure changes in the lattice parameter of the SiC particles after permanent deformation at 25 °C, and subsequent shape recovery induced by heating to 120 °C. Under 50% compression of the composite material, the nanoparticles store a finite compressive stress, which is almost completely released during heated strain recovery. The values of the stored internal stresses in the particles are compared to values based on micromechanic calculations. |
| Databáze: | OpenAIRE |
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