351 results about "Shear load" patented technology

An adjustable-height bicycle seat post assembly comprises a hollow seat post for supporting a bicycle seat slidably on plastic guides or shims inside a hollow tube. The hollow tube clamps into the frame of a bicycle. A mainspring forces the post upward, but a locking mechanism interconnects the post with the tube in various fixed positions relative to the tube. The locking mechanism includes a housing, which supports a plunger for reciprocating movement into and out of engagement with holes on the post. The locking mechanism is affixed to the outside of the tube to bear shearing forces on the plunger. An endcap on the locking mechanism and a topcap on the tube protect the assembly from foreign debris. The locking mechanism may be manipulated remotely using a magnetic switch assembly or manually using a mechanical assembly. A lost motion coupling is integrated into the locking mechanism and/or actuator assembly to enable the remote actuator to be moved or deployed while the latch remains trapped under the influence of a dominant shear load. The lost motion coupling is also effective to allow an operator to deploy the remote actuator at any convenient time prior to a desired change in seat height.

A flooring system including horizontal metal framing members, for example, C-joists, U-joists, open web joists, HAMBRO or other metal frame systems that support a reinforced, lightweight, dimensionally stable SCP panel. The flooring system is non-combustible, water durable, mold and rot resistant, termite resistant and is capable of resisting shear loads equal to or exceeding shear loads provided by plywood or oriented strand board panels. The panels employ one or more layers of a continuous phase resulting from the curing of an aqueous mixture of inorganic binder, for example, calcium sulfate alpha hemihydrate, hydraulic cement, an active pozzolan and lime. The continuous phase is reinforced with glass fibers and contains lightweight filler particles, for example, ceramic microspheres.

A vertical shear wall system including vertical metal framing members, for example, C-joists, U-joists, open web joists, or other metal frame systems that support a reinforced, lightweight, dimensionally stable SCP panel. The shear wall system is non-combustible, water durable, mold and rot resistant, termite resistant and is capable of resisting shear loads equal to or exceeding shear loads provided by plywood or oriented strand board panels. The panels employ one or more layers of a continuous phase resulting from the curing of an aqueous mixture of inorganic binder, for example, calcium sulfate alpha hemihydrate, hydraulic cement, an active pozzolan and lime. The continuous phase is reinforced with glass fibers and contains lightweight filler particles, for example, ceramic microspheres.

A fastener, such as a nail, screw, etc., which possesses supplemental support and/or retention capability is provided. The fastener includes an elongated auxiliary member secured interiorly to, exteriorly to, or along the shaft of the fastener. The auxiliary member is secured to the shaft at two or more portions of the shaft. The auxiliary member provides the shaft with additional support strength and/or enables fastened materials to be retained upon breakage or shearing of the shaft as a result of, for example, heavy tensile or shearing loads. To facilitate breakage or shearing of the shaft, the shaft may be provided with a deformation, such as a notch or reduced circumference, at one or more desired locations such that the shaft breaks or shears at the deformation(s), thereby allowing the auxiliary member to function as the sole member which retains the fastened materials. The auxiliary member may be sufficiently flexible and pliable such that, upon breakage or shearing of the shaft, retention of the materials is maintained but in a less stressed form.

A rotor blade includes a removable blade tip section which is mounted to an outboard rotor blade section by mechanically mounting a tip spar to a main blade spar with a spar interface section which bridges a butt joint between the blade spar and the tip spar. The spar interface section is mounted within the blade spar and the tip spar with a multiple of threaded fasteners which are under shear load during rotor blade rotation.

The invention belongs to the technical field of strength tests in aviation, and particularly relates to a test device capable of evenly applying an axial compression load and a shearing load. The test device comprises a shearing load applying component 1, an axial compression load applying component 2, a lower platform component 3 and a rib-adding flat plate component 4. According to the technology for independently loading the compression load and the shearing load, adopted by the device, the device not only is suitable for the flat plate, but also is suitable for a rib-adding flat plate. Furthermore, the test debugging of the single axial compression load and the single shearing load under the condition that the rib-adding flat plate is invariable in an installing posture can be realized, so that the reference can be provided for the analysis of the stress state of a lower wall plate under the joint action of the compression load and the shearing load. The device applies shearing force by the self-balance principle of a whole frame and a 'load balancer', so that the shearing force can be evenly applied, the axial rigidity of the rib-adding flat plate can not be enhanced due to an adopted segmental shearing reinforcement block, a compression load applying effect can not be influenced, and a 'side frame effect' can be avoided.

A blind fastener with a pin having a pin shank which extends through a cylindrical main sleeve and expansion sleeve whereby it can be gripped and pulled by an installation tool with the pin having an enlarged pin head at the blind end of the pin shank. The expansion sleeve is located between the pin head and the inner end of the main sleeve and is adapted to move into the inner or blind end of the main sleeve to form a first tulip shaped blind head for clamping workpieces together in response to a relative axial force applied between the sleeves and pin by engagement of the pin head with the expansion sleeve. As the axial force is increased the pin head is moved into the expansion sleeve to form a second tulip head to further clamp the workpieces and to secure the pin, main sleeve and expansion sleeve together at that end and is moved closely adjacent the workpiece surface at the blind side to form a high strength blind head.

A testing apparatus is disclosed that includes a turntable, an upper scissor jack assembly and a lower scissor jack assembly positioned in parallel planes, about a longitudinal axis and affixed to a base. The apparatus is powered by at least three motors with supporting controllers. The lower assembly is affixed to the base mechanically via the turntable which allows the lower assembly to rotate with respect to the upper assembly. There are two loading plates attached to the hinges of each scissor jack. The test specimen is secured by the loading plate. Each scissor jack operates by a screw-gear powered by one of the motors. Upon energizing a stepper motor; the screw-gear positions a scissor jack to apply a tension or compression on the specimen. While subjected to tension or compression, the lower jack assembly can be rotated with respect to the upper assembly for in-plane shear loading.

In accordance with certain embodiments, a wind turbine blade includes an outer skin and an internal support structure. The skin has a closed airfoil shape and includes an outer surface, an inner surface, and opposite sides along a length of the blade. The internal support structure is disposed within the closed airfoil shape. The internal support structure includes at least one shear load bearing member disposed across the opposite sides and oriented lengthwise along the length of the blade. The internal support structure further includes a plurality of bending load bearing members disposed along the inner surface in a lengthwise direction along the length of the blade. The internal support structure is configured to position a shear center and a center of aerodynamic pressure loading of the blade at different locations relative to one another.

The invention is directed to a building panel which has structural integrity. A plurality of stud members with opposed side surfaces and opposed end surfaces extend from a first face of the panel toward a second face. The plurality of stud members are spaced from each other and extend in a direction which is essentially parallel to each other. A rigid foam fills the volume of the panel which is not filled by the plurality of stud members. The rigid foam is bonded to at least one side surface of each of the plurality of stud members. The bonding of the rigid foam to the plurality of stud members results in a stable and strong panel which is capable of accommodating large shear loads.

The invention relates to a site large-scale direct shearing test device of the shearing strength of a concrete and basement adhesion surface, comprising two sets of independent pile foundation static load test systems, a bracket stand column, a cross beam, a counter-force beam, a longitudinal beam, a protective cylinder, a base plate and a force transferring block. One set of pile foundation static load test system controls the vertical displacement data collection application to the load and is connected to the top surface of a trail body below the counter-force beam; the other set of pile foundation static load test system controls shearing load application and shearing displacement data collection and is arranged between a concrete backseat and the side of the trail body; the cross beam is arranged above the bracket stand column; the counter-force beam is connected below the cross beam; the protective cylinder is connected with the cross beam through the longitudinal beam; and one side of the force transferring block is connected with the pile foundation static load test system and the other side is connected with the concrete trail body through the base plate. Compared with the prior art, the invention solves the problems of unstable loading system and complex counter-force system, really realizes full automation of static load test and has the advantages of strong applicability, wide application and higher precision.

A plate to reinforce a shear panel that has been weakened by an opening extending through the panel is provided. The plate is selected to have a shear load capacity greater than the shear panel without the opening. The plate has a plate opening similar to the panel opening, and is secured to the panel with a predetermined strength and arrangement of panel fasteners. The plate is sized to fit between adjacent structural members. Opposing side flanges extend outwardly from the plate. Flange fasteners of predetermined strength and spacings are used to secure the flanges to the structural members.

The invention discloses a visualization testing method and device for a granular material mechanics experiment. The method comprises the following steps: putting luminous millimeter-sized granules into a visualization loading device capable of applying a compression/shear load; starting a light source to propagate light emitted by the light source along a polarizer, a quarter-wave plate, the visualization loading device, a quarter-wave plate, an analyzer and a camera in sequence; and applying the compression load, the shear load or the combination of the compression load and the shear load to the granules according to corresponding experimental requirements. In a loading process, fringes which are alternately dark and bright are formed in an image acquired by the camera; according to a stress-optical law, the size change of the stresses at different positions in the millimeter-sized granules can be directly observed through the density of the fringes or the light intensity; and after the image acquired by the camera is processed, the stress distribution in granular media can be identified and metered, and the contact stress between the granules, the thickness and angle of shear bands in the granular media and the distribution and trend of mechanical chains can be visualized.

Thermoelectric devices with interface materials and methods of manufacturing the same are provided. A thermoelectric device can include at least one shunt, at least one thermoelectric element in thermal and electrical communication with the at least one shunt, and at least one interface material between the at least one shunt and the at least one thermoelectric element. The at least one interface material can comprise a plurality of regions comprising a core material with each region separated from one another and surrounded by a shell material. The interface material can be configured to undergo deformation under (i) a normal load between the at least one shunt and the at least one thermoelectric element or (ii) a shear load between the at least one shunt and the at least one thermoelectric element. The deformation can reduce interface stress between the at least one shunt and the at least one thermoelectric element.

Fastening systems for parts that endure high vibration shear loads have traditionally been difficult or expensive to produce. This application describes a fastening system with multiple conical surfaces and eccentric offsets. The novel conical fastener system allows parts to be assembled with reduced tolerance controls at interface features while improving alignment precision. The eccentric conical fastening system is particularly well suited for assemblies with high shear loads in high vibration/shock environments, and/or for systems that have extremely precise pointing requirements.

The invention belongs to a strength testing device and a testing method for a fuselage wall plate under the action of combined loads. The strength testing device for the fuselage wall plate under the action of the combined loads comprises corner boxes, airtight end plates, the fuselage wall plate, a hinge, mandrils, keels and arc-shaped rubber plates, wherein the airtight end plates are arranged at two ends of the fuselage wall plate, the corner boxes are arc-shaped components and installed at a combined part between the airtight end plates and the fuselage wall plate, the keels are arc-shaped frames, the keels are connected in a pasting mode through the arch-shaped rubber plates to form a keel group, the mandrils are installed on web plates at two ends of the keel group, and the hinge is arranged on the fuselage wall plate and the keel group and achieves hinged connection of the fuselage wall plate and the keel group. According to the strength testing device and the testing method for the fuselage wall plate under the action of the combined loads, boundary conditions of the fuselage wall plate can be effectively imitated, the combined loads are conveniently used for achieving a strength test, and due to the fact that drawing loads and compressing loads are not used at the same time, the applied combined loads are one kind of or two kinds of or three kinds of internal pressure loads, drawing loads (or compressing loads) and shear loads.

The invention relates to an aircraft fuselage panel test device, in particular to a fuselage panel combined load test device. The fuselage panel combined load test device comprises an axial load applying assembly (100), a shear load applying assembly (200), an air pressure and circumferential load balance assembly (300) and a counterweight assembly (400), wherein single load can be applied among the assemblies, and the assemblies can be freely combined to apply load. Stretching/compressing, shearing and airtight load can be applied to a fuselage panel at the same time for static force and fatigue experiments, and static force, fatigue and damage tolerance tests related to the fuselage panel can be performed, so that the design level is promoted, and the design period is shortened.

A method of forming synthetic dry adhesives is provided that includes using a wedge-shaped tool to form mold cavities in a mold, filling the mold cavities with an elastomeric adhesive, removing the elastomeric adhesive from the mold, where a tapered lamellar ridge extends from a surface of the elastomeric adhesive, treating a tip of the extending ridge with a film of uncured elastomeric material, and curing the film of uncured material while the extending ridge is pressed against a substrate surface having a smoothness or texture. The synthetic dry adhesive comprises a close-packed array of tapered lamellar ridges, where the centerline of a ridge is angled relative to a direction normal to the synthetic dry adhesive and the cross section includes an internal taper. The tapered ridge bends when it contacts a surface, whereupon the radius of curvature of the ridge increases monotonically with increasing shear load.