Bend radius

About: Bend radius is a research topic. Over the lifetime, 3303 publications have been published within this topic receiving 35415 citations. The topic is also known as: minimum bend radius.

Method for production of sandwich panels with zigzag corrugated core

Abstract: The invention can be defined in its most general form as a method for production of sandwich panels with zigzag corrugated core (2) from sheet material used in aircraft construction, shipbuilding, and other branches of industry.With the aim to improve the quality and ease of sheet blank folding into the 3-D relief structure in the sheet blank at locations of crimp zigzag lines (4) protrusions and recesses the holes are punched with the diameter not less than the sheet blank bending radius.

Heat reshapeable regid conduit

Abstract: A heat reshapeable rigid conduit and method for forming an elbow or offset having any desired bend radius therefrom. The rigid conduit is formed of a flexible metal tubing with a layer of heat softenable plastic preferably covering the exterior surface thereof. The conduit may be heated using conventional electric heaters on the job site, then shaped into the desired bend radius to form an elbow or offset. The plastic layer provides rigidity to the elbow or offset upon cooling. The flexible metal tubing has interlocking overlapping joined edges that permit flexing of the tubing when the plastic layer is heat softened. The flexible metal tubing resists the sawing action of a pulling line during the installation of an electrical conductor in the conduit. The plastic outer layer permits quick and inexpensive coupling between adjacent conduit sections. The heat reshapeable rigid conduit may be formed by extruding a plastic coating on the exterior of the flexible tubing, or may be formed by frictionally fitting a length of flexible metal tubing inside a length of plastic tubing. A section of the rigid conduit may also be heated and extended to correct for any error in measurement or cutting.

Effect of inertial lift on a spherical particle suspended in flow through a curved duct

Abstract: We develop a model of the forces on a spherical particle suspended in flow through a curved duct under the assumption that the particle Reynolds number is small. This extends an asymptotic model of inertial lift force previously developed to study inertial migration in straight ducts. Of particular interest is the existence and location of stable equilibria within the cross-sectional plane towards which particles migrate. The Navier–Stokes equations determine the hydrodynamic forces acting on a particle. A leading-order model of the forces within the cross-sectional plane is obtained through the use of a rotating coordinate system and a perturbation expansion in the particle Reynolds number of the disturbance flow. We predict the behaviour of neutrally buoyant particles at low flow rates and examine the variation in focusing position with respect to particle size and bend radius, independent of the flow rate. In this regime, the lateral focusing position of particles approximately collapses with respect to a dimensionless parameter dependent on three length scales: specifically, the particle radius, duct height and duct bend radius. Additionally, a trapezoidal-shaped cross-section is considered in order to demonstrate how changes in the cross-section design influence the dynamics of particles.

Volume reflection of high-energy protons in short bent crystals

Abstract: Characteristics of volume reflection for high-energy protons in short bent crystals are considered by simulation. The deflection efficiency and angle depend on the bend radius of the crystal. The concurrent process of volume capture of particles into channeling states limits the reflection efficiency. The optimal parameters of a crystal for using it as a beam reflector were determined. It was shown that the deflection efficiency of high-energy proton beams by the sequence of reflections in short bent crystals is high for small deflection angles. This allows considering possible applications of crystal reflectors for the beam collimation of hadrons colliders and for high-energy physics experiments.

Foldable electronic device assemblies and cover elements for the same

Abstract: A cover element for a foldable electronic device that includes a foldable glass element, first and second primary surfaces, and a compressive stress region extending from the first primary surface to a first depth that is defined by a stress σ 1 of at least about 100 MPa in compression at the first primary surface. The device also includes a polymeric layer disposed over the first primary surface. The glass element has a stress profile such that when the glass element is bent to a target bend radius of from 1 mm to 20 mm, to induce a bending stress σ B at the first primary surface in tension, σ 1 +σ B < 400 MPa (in tension). Further, the cover element can withstand a pen drop height of at least 1.5 times that of a control pen drop height of the cover element without the layer according to a Drop Test 1.