Analysis of Non-Uniform Expansion Behavior of Injected EVA

We construct a wavelet-based almost-sure uniform approximation of fractional Brownian motion (FBM) (Bt(H))_t∈[0,1] of Hurst index H ∈ (0, 1). Our results show that, by Haar wavelets which merely have one vanishing moment, an almost-sure uniform expansion of FBM for H ∈ (0, 1) can be established. The convergence rate of our approximation is derived. We also describe a parallel algorithm that generates sample paths of an FBM efficiently.

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Studies on the Volumetric Stability and Mechanical Properties of Cement-Fly-Ash-Stabilized Steel Slag

Materials ◽

10.3390/ma14030495 ◽

2021 ◽

Vol 14 (3) ◽

pp. 495

Author(s):

Mingkai Zhou ◽

Xu Cheng ◽

Xiao Chen

Keyword(s):

Mechanical Properties ◽

Fly Ash ◽

Steel Slag ◽

Critical Issue ◽

Expansion Behavior ◽

Strength Tests ◽

Road Materials ◽

Base Course ◽

The Stability ◽

Aggregate Base

The stability of steel-slag road materials remains a critical issue in their utilization as an aggregate base course. In this pursuit, the present study was envisaged to investigate the effects of fly ash on the mechanical properties and expansion behavior of cement-fly-ash-stabilized steel slag. Strength tests and expansion tests of the cement-fly-ash-stabilized steel slag with varying additions of fly ash were carried out. The results indicate that the cement-fly-ash-stabilized steel slag exhibited good mechanical properties. The expansion rate and the number of bulges of the stabilized material reduced with an increase in the addition. When the addition of fly ash was 30–60%, the stabilized material was not damaged due to expansion. Furthermore, the results of X-CT, XRD and SEM-EDS show that fly ash reacted with the expansive component of the steel slag. In addition, the macro structure of the stabilized material was found to be changed by an increase in the concentration of the fly ash, in order to improve the volumetric stability. Our study shows that the cement-fly-ash-stabilized steel slag exhibits good mechanical properties and volumetric stability with reasonable additions of fly ash.

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Thermal stability and thermal expansion behavior of FeCoCrNi2Al high entropy alloy

Advanced Powder Technology ◽

10.1016/j.apt.2020.12.019 ◽

2021 ◽

Author(s):

Mahesh S. Jadhav ◽

Disna Sahane ◽

Amit Verma ◽

Sheela Singh

Keyword(s):

Thermal Stability ◽

Thermal Expansion ◽

High Entropy Alloy ◽

Thermal Expansion Behavior ◽

High Entropy ◽

Expansion Behavior

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Anomalous thermal expansion behaviors of wood under dry and low-temperature conditions

Holzforschung ◽

10.1515/hf-2013-0103 ◽

2014 ◽

Vol 68 (5) ◽

pp. 567-574 ◽

Cited By ~ 3

Author(s):

Tsunehisa Miki ◽

Hiroyuki Sugimoto ◽

Yuzo Furuta ◽

Ichinori Shigematsu ◽

Kozo Kanayama

Keyword(s):

Thermal Expansion ◽

Linear Thermal Expansion ◽

Longitudinal Direction ◽

Mechanical Analysis ◽

Solid Wood ◽

Compression Pressure ◽

Thermal Expansion Behavior ◽

Expansion Behavior ◽

Dry Conditions ◽

Anomalous Thermal Expansion

Abstract The thermal expansion behavior of dry solid wood was investigated by dynamic dilatometry and thermal mechanical analysis. Anomalous thermal expansion behavior was observed concerning the displacement change under a constant compression pressure, which was not previously reported. Wood submitted to temperatures below 0°C under dry conditions exhibited a large increment in the linear thermal expansion coefficient (CLTE) and a sudden drop in the CLTE around 50°C as well as above 130°C during heating. In subsequent cooling/heating processes, these anomalous behaviors remained at temperatures below 100°C, although less pronounced, and disappeared at temperatures above 100°C. These behaviors were clearly perceptible in the radial and tangential directions but not in the longitudinal direction. The CLTE depended strongly on the heat and moisture history of the samples and the effects are species-specific.

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