This paper reviews the shape distortions in a polymer composite, its sources, characterization techniques, and remedies. The distortion may include warpage, spring-in, or change enclosed diameter for flat, angled, circular parts. Residual stresses are considered to be major source of (dimensional instability) laminated composites. These result difference thermal expansion behavior different pli...

This study investigates the buckling behavior of short cylindrical shells with hemi-spherical heads subjected to hydrostatic pressure. It is assumed that the length of the cylindrical part is smaller than or equal to its diameter while its material may be dif-ferent from that of hemispherical heads. Finite element analysis was used to seek out the effect of geometric parameters such as thicknes...

The objective of the study is to determine flexural behavior built-up cold-formed steel (CFS) channel section strengthened with an oriented strand board (OSB) in three-point bending experiment. CFS a variety shapes and grades classified as steel-based material exposed buckling failure when subjected compression or load. Thus, 100 mm web, 50 flange, 12 lip, 1.55 thickness has been selected. Then...

We have demonstrated compression stress induced mechanical deformation of microtubules (MTs) on a two-dimensional elastic medium and investigated the role of compression strain, strain rate, and a MT-associated protein in the deformation of MTs. We show that MTs, supported on a two-dimensional substrate by a MT-associated protein kinesin, undergo buckling when they are subjected to compression ...

thin-walled hollow steel columns, either circular or box shaped, are commonly used as piers in bridges. recent earthquakes, e.g. hyogoken-nanbu or kobe 1995, on the other hand have shown that these columns are vulnerable to damage when subjected to earthquake loading. this paper presents a new innovative thin-walled hollow steel column fabricated of corrugated plates, “thin-walled steel columns...

The use of aluminium alloys as a structural material has recently increased because their advantageous properties such high strength-to-weight ratio and corrosion resistance. However, due to low Modulus Elasticity, instability is major concern for alloy members subjected compression. One the ways improve performance hollow sections on this count have concrete infill within them. Past research s...

In this paper, the modified Euler-Bernoulli beam model is presented to examine the influence of surface elasticity and residual surface tension on the critical force of axial buckling of nanotubes in the presence of rotary inertia. An explicit solution is derived for the buckling loads of microscaled Euler beams considering surface effects. The size-dependent buckling behavior of the nanotube d...

high performance fiber reinforced cementitious composite (hpfrcc) materials exhibit strain hardening behavior with multiple cracking under tensile loading. in this paper, experimental and parametric studies are performed to assess the influence of using hpfrcc material instead of normal concrete in reinforced concrete beams. after calibrating the experimental results, the analytical results inc...

This study presents the results of an experimental program to investigate the effectiveness of an innovative combined FRP technique using combination of externally bonded (EB) FRP fabrics and near surface mounted (NSM) FRP rods for flexural strengthening of existing reinforced concrete (RC) two-wayslabs with low clear cover thickness. Three full-scale RC slabs (1500×1500×120 mm) were tested und...