50 results about "Stress failure" patented technology

A heat resistant positive-working photosensitive PBO precursor composition comprising:(a) at least one polybenzoxazole precursor polymer;(a) at least one plasticizer compound;(b) at least one solvent;wherein the amount of the plasticizer present in the composition is an amount effective to reduce the sidewall angle of imaged and cured features in the coated film on the substrate to prevent stress failures in subsequent metallization of the substrate due to steep angles of the imaged features, and with the proviso that if the polybenzoxazole precursor polymer solely consists of polybenzoxazole precursor polymers that do not contain a photoactive moiety on the polymer, then(c) at least one photoactive compound is also present in the composition.

An internal pulse damper for use in a fuel rail for an internal combustion engine. The damper is formed from a length of tubular metal stock having a flat oval cross-section and ends flattened by crimping to form a captive-air pillow. The end crimps are improved through use of tooling to eliminate a creased sidewall area vulnerable to stress failure in prior art pulse dampers. Such tooling includes constraints to prevent the tubing sides from flaring out and forming a longitudinal crease adjacent the end crimp during squeezing-shut of the tube end.

A rotating cylinder is used to orient wood material, such as but not limited to blocks (e.g., finger joint blocks), preparatory to further processing. The rotating cylinder uses gravity and a tumbling action of the blocks to orient the blocks and move them through the cylinder. Unlike known apparatus such as vibrating conveyors, embodiments of the invention are relatively simple, vibration free, not prone to mechanical stress failures, are quiet, and use minimal horsepower to operate. Furthermore, embodiments of invention may advantageously reduce noise-caused fatigue amongst lumber workers, as well as reduce maintenance and power costs. The rotating cylinder may be part of a larger system for orienting wood material, such as blocks, for further lumber processing.

The invention provides a flexible display device, which comprises a shell, a roller group, a supporting layer and a flexible display screen. The shell is cylinder-shaped, a containing cavity is formedinside the shell, and an opening is formed on the lateral side of the shell. The roller group is arranged inside the containing cavity, and comprises a first roller and a second roller and a connecting part for connecting the first roller and the second roller. The axis of the first roller and the second roller is parallel to the axis of the shell. The supporting layer winds the first roller andthe second roller, and the winding direction of the supporting layer on the first roller is opposite to the winding direction of the supporting layer on the second roller. The supporting layer extendsout of the shell from an opening. The flexible display screen is arranged on the supporting layer. The winding direction of the flexible display screen on the first roller is opposite to the windingdirection of the flexible display screen on the second roller. With the stress cancelled out, the stress failure risk of the flexible display screen is reduced.

In one or more embodiments, one or more methods, processes, and / or systems described can determine stress failures in interconnect segments of integrated circuit designs and correct those failure via modifying the interconnect segments of the integrated circuit designs with one or more additions to the interconnect segments of the integrated circuit designs. Potentials can be received from a simulation, and one or more failures of an interconnect segment can be determined via the potentials from the simulation. For example, a failure can be determined via a comparison with a potential from the simulation and a critical potential. An interconnect segment can be modified with a stub such that a comparison with a potential from the simulation and a critical potential to provide a non-failing, modified interconnect segment.

A subsurface safety valve particularly designed for high temperature and high pressure applications has an improved tubular joint connection that provides for a compliant metal to metal seal without adversely affecting the break out torque. The valve also includes axially extending grooves in the inner surface of the tubular housing in the area of a actuating piston bore to relief stresses in that area thereby reducing the risk of stress failure.

The invention discloses a model test device for the dislocation damage of a tunnel crossing an active fault zone that can apply triaxial stress. The sample is subjected to triaxial loading, and the test in the third test chamber is subjected to triaxial loading through the second longitudinal loading device, the third lateral loading device and the third vertical loading device, and the first longitudinal loading device and the second longitudinal loading device The output force and the second lateral loading device and the second vertical loading device carry out triaxial loading on the test in the second test chamber; the first test chamber and the third test chamber are realized by the first driving device and the second driving device. In order to realize the simulation of the relative displacement between the upper and lower walls of the active fault zone and the weak geological bodies in the fault zone, to obtain the displacement distribution mode and evolution law of the geological bodies in the fault zone when the active fault zone is dislocated, In order to reveal the surrounding rock response of the tunnel (cave), the scientific design of the support system provides a reliable experimental method.

A fastener and a method for reducing stress failure in a fastening joint of an internal combustion engine component are provided. The threaded fastener may be a bolt or a stud secured to an engine block. The fastener has a threaded tip portion with a radius and a distal end. The threaded tip portion is inserted into a threaded hole to define a threaded interface. In one embodiment, the load carrying capability is increased by progressively reducing the radius of at least a part of the threaded tip portion. In another embodiment, the load carrying capability is increased by an axially extending hole at the distal end of the threaded tip portion, the hole having a progressively reduced diameter.