Topic
Elastic modulus
About: Elastic modulus is a research topic. Over the lifetime, 33153 publications have been published within this topic receiving 810247 citations.
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TL;DR: In this article, polypropylene (PP) was injection molded several times to mimic the effect of recycling procedures and the influence of the recycling was studied by following changes in chemical structure, melt viscosity, crystallisation behavior, and tensile and fracture properties.
Abstract: Polypropylene (PP) was injection moulded several times to mimic the effect of recycling procedures. The influence of the recycling was studied by following changes in chemical structure, melt viscosity, crystallisation behaviour, and tensile and fracture properties. The main effect of recycling is the lowering of the melt viscosity, which is attributed to molecular weight decrease. Recycled PP exhibits greater crystallisation rate, higher crystallinity and equilibrium melting temperature than those measured for virgin PP. Elastic modulus and yield stress increase with the number of recycling steps. However, elongation at break and fracture toughness decrease.
160 citations
TL;DR: In this article, a simplified and linearized version of a theory proposed by Steigmann-Ogden to capture curvature-dependence of surface energy is proposed, and the curvature dependence is analyzed in terms of the effective elastic modulus of nanostructures.
Abstract: At small length scales, several size-effects in both physical phenomena and properties can be rationalized by invoking the concept of surface energy. Conventional theoretical frameworks of surface energy, in both the mechanics and physics communities, assume curvature independence. In this work we adopt a simplified and linearized version of a theory proposed by Steigmann–Ogden to capture curvature-dependence of surface energy. Connecting the theory to atomistic calculations and the solution to an illustrative paradigmatical problem of a bent cantilever beam, we catalog the influence of curvature-dependence of surface energy on the effective elastic modulus of nanostructures. The observation in atomistic calculations that the elastic modulus of bent nanostructures is dramatically different than under tension – sometimes softer, sometimes stiffer – has been a source of puzzlement to the scientific community. We show that the corrected surface mechanics framework provides a resolution to this issue. Finally, we propose an unambiguous definition of the thickness of a crystalline surface.
160 citations
TL;DR: The adopted voxel-based FE approach is found to be a robust method to predict the linear elastic properties of human cancellous bone, provided segmentation of the microCT reconstructions is carefully calibrated, tissue modulus is known a priori and the entire region of interest is included in the analysis.
160 citations
TL;DR: This work describes a new technique to process curves to distinguish structures of different stiffness buried into the bulk of the sample, verified by finite element models and successfully applied to living cells.
159 citations
Journal Article•
TL;DR: In this article, the influence of four coarse aggregate types available in Northern California on the compressive strength and elastic behavior of a very high-strength concrete mixture was investigated, and it was found using diabase and limestone aggregates produced concretes with significantly higher strength, and elastic modulus than those using granite and river gravel.
Abstract: An experimental study investigated the influence of 4 coarse aggregate types available in Northern California on the compressive strength and elastic behavior of a very high-strength concrete mixture. Using identical materials and similar mix proportions, it was found using diabase and limestone aggregates produced concretes with significantly higher strength and elastic modulus than those using granite and river gravel. The mineralogical differences in the aggregate types are considered to be responsible for this behavior.
159 citations