Thin high-strength steel sheets are increasingly being applied to vehicle frames in order increase the strength and reduce weight. The thinner plate, more likely it is occur buckling. So important understand structural properties based on buckling theory efficiently design for early stages of development. authors have addressed issue theoretically determining shear stresses torsion thin-walled ...

This paper introduces a purely heuristic topology optimization framework to improve specific energy absorption for thin-walled, extruded lattice structures. The optimizes the cross section design by iteratively updating wall thicknesses. main novelty of work is two novel thickness update schemes we proposed. first scheme direct statement homogenization wall-wise absorption, while other based on...

Suspensions of single-walled, double-walled and multi-walled carbon nanotubes (CNTs) were generated in the same solvent at similar concentrations. Films were fabricated from these suspensions and used in carbon nanotube/silicon heterojunction solar cells and their properties were compared with reference to the number of walls in the nanotube samples. It was found that single-walled nanotubes ge...

t rue saccular aneurysm is exceptional in coarctation of aorta in children. a 6-year-old girl with headache and systemic arterial hypertension referred to our center for cardiovascular evaluation. physical examination revealed high blood pressure and weak lower extremity pulses. two-dimensional and doppler echocardiography and angiography demonstrated a saccular aneurysm of the descending aorta...

impact is one of the most important subjects which always have been considered in mechanical science. nature of impact is such that which makes its control a hard task. therefore it is required to adopt a safe and secure mechanism for transferring the impact to other vulnerable parts of a structure, when it is necessary. one of the best methods of absorbing impact energy is using thin-walled tu...

Single walled carbon nanotube shows excellent chemical and physical properties and it has been extensively explored for novel applications. It has been shown that single walled carbon nanotube can be used to improve sensitivity of sensors such as bio sensors, gas sensors and mechanicals sensor by its unique properties. As a mechanical sensor, a mechanical force deforms the single walled carbon ...