The prediction of fracture in thin-walled structures is decisive for a wide range applications. Modeling methods such as the phase-field method usually consider cracks to be constant over thickness which, especially load cases involving bending, an imperfect approximation. In this contribution, phenomena along direction structural elements (plates or shells) are addressed with modeling approach...

The effects of the thickness (t), grain size (d), ratio t/d, and tensile direction on properties were carefully examined using ASTM grade 1 pure titanium having a strong B texture with controlled (0.2–0.4 mm), (20–175 µm), t/d (2.3–19.4). 0.2%-proof stress followed Hall-Petch relationship in each regardless thickness, this indicates that does not depend t/d. On other hand, strength uniform elon...

This paper investigates symmetrical buckling of orthotropic circular and annular plates of continuous variable thickness. Uniform compression loading is applied at the plate outer boundary. Thickness varies linearly along radial direction. Inner edge is free, while outer edge has different boundary conditions: clamped, simply and elastically restraint against rotation. The optimized Ritz method...

We investigate the growth of self-organized tubes formed by injection of metal salt solutions into silicate solution. The wall thickness increases strictly in an inward direction and obeys square root functions suggesting the presence of a traveling reaction-diffusion front in the radial direction. We also demonstrate the construction of multi-layered tubes.

Distortion and deformation of tubes during machining operations are very important. In this study, a tube used in magnetic drum separator under concentrated load (machining load) is considered. Using finite element simulation, deformities and their dependence on parameters such as the thickness of the tube and the place of concentrated force are observed and predicted. To compare and confirm th...