Wrinkles are commonly observed in stretched thin sheets and membranes. This paper presents a numerical study on stretch-induced wrinkling of hyperelastic thin sheets based on nonlinear finite element analyses. The model problem is set up for uniaxial stretching of a rectangular sheet with two clamped ends and two free edges. A two-dimensional stress analysis is performed first under the plane-s...

Horizontal strain at the bottom of asphalt concrete due to repeated traffic loads is the most critical parameter in characterizing fatigue performance of flexible pavement. The study of horizontal strain is thus very important to understand the strain behavior, predict the fatigue life and implement in design and analysis. A total of twelve Horizontal Asphalt Strain Gages (HASGs), six gages ori...

The Non-Linear Strain Energy Equivalence Theory, a semi-empirical model, is utilized to predict longterm creep from short-term compressive stress-strain experiments conducted at different strain rates. Stress-strain experiments in uni-axial compression are performed at strain rates of 3 and 0.03 %/minute to predict creep behavior and stress-strain data at several strain rates for an immiscible ...

Ti-47 at.%Ni alloy films were prepared by magnetron sputtering followed by 460°C for 40 minutes heat-treatment. The strain fields between B2 phase matrix and G.P. zone were mapped by a combination of high-resolution transmission electron microscopy and geometric phase analysis method. It was found that there is a compressive strain region parallel to the longitudinal axis of G.P. zone with 2 nm...

Mechanical properties of tibial bone at compressive strain rates of 50-200 s are obtained through Split Hopkinson pressure bar. Cylindrical specimens of 12-15 mm diameter and 2-5 mm thickness were used. The Young’s moduli are calculated from linear portion of stress-strain curves. For both cortical and cancellous part of the bones, the Young’s modulus was found to increase with the increasing s...

We have measured electron and hole impact ionization coefficients in biaxially strained In,Gat -&JIn,,Alll -,,As (0.44 <x <0.62,0.44 <y < 0.62) multiquantum wells for the first time. It is seen that o/a is enhanced due to strain-induced changes in band gap, band offsets, and bandstructure for tensile strain in the well and compressive strain in the barrier. The results have been interpreted by ...

Selected area channeling patterns imaged on an SEM are digitized and displayed on the screen of a Macintosh computer, on which the user selects channeling bands that are measured to determine orientation. Grain boundary misorientations are found using the orientation information for pairs of grains adjacent at grain boundaries, and the boundaries are classified as low angle boundaries (LABs), c...

The effect of strain on the stability of different surface reconstructions on InAs~001! is investigated with density-functional theory calculations. The effects of isotropic as well as anisotropic tensile and compressive strain is investigated, and the results are presented in corresponding equilibrium phase diagrams. I find that the range of stability for any of the relevant reconstructions ca...

Author: Jeong ho Choi Title: Fabrication and Compressive Yield Strength of Open Cell Corrugated Cellular Solids Institution: Embry-Riddle Aeronautical University Degree: Master of Science in Aerospace Engineering Year: 2005 This thesis studied the fabrication and compressive yield strength of# open cell corrugated cellular solids made from type 304 stainless steel. Test samples were made by cor...

Many studies have measured the global compressive properties of tissue engineered (TE) cartilage grown on porous scaffolds. Such scaffolds are known to exhibit strain softening due to local buckling under loading. As matrix is deposited onto these scaffolds, the global compressive properties increase. However the relationship between the amount and distribution of matrix in the scaffold and loc...