80 results about "Inelastic deformation" patented technology

At a beams-to-column joint connection of two beams to a column, in which the joint connection comprises both a gravity load-carrying connection and a moment-resisting connection, there is added a beam-to-beam connection across the column, using two gusset plates, facing each other, on opposite sides of the joint connection. The gusset plates, which are not connected to the column in a moment-resisting connection, connect the two beams, in a tension and moment-resisting connection with respect to each other, by longitudinal welds between the gusset plates and the beams, and provide the capability of withstanding disastrous events, including loss of column support and/or loss of integrity of the beams-to-column joint connection and severe torsional and lateral inelastic deformation due to direct blast pressure. When subjected to such violent conditions and upon loss of column support, and, the likely loss of integrity of the beams-to-column joint connection, the two beams and two gusset plates provide independent beam-to-beam structural continuity, causing the two beams to act as one long beam, or, in other words, a “double-span” condition is created. Such beam-to-beam connection is capable of carrying the tension, torsional and moment loads placed upon the beams, to the ultimate capacity of the beams. Inasmuch as a gusset plate is disposed on each side of the beams-to-column joint connections, substantial shielding of those connections against blast and impact forces is also achieved.

The present invention relates to orthodontic positioning appliances and related methods. An appliance in accordance with the present invention has teeth receiving cavities shaped to receive and apply a resilient positioning force to the patient's teeth. At least one of the cavities of the appliance includes a portion shaped to compensate for non-elastic deformation due to use of the appliance.

An elongate carrying strap reinforced by longitudinally extending multi-strand wire cables (41) is engaged with a fitting (1) for forming a loop (64) at an end of the strap (2) so as to avoid inelastic deformation of the cable. A pair of multi-strand wire cables are received in parallel envelopes (43) disposed on opposite longitudinal edges of the strap, each envelope is tubular and formed in a flexible polymer strip (40) extruded over the cable. The fitting has a transverse bar portion (71) having a convex face abutting the inner side of the loop and a pair of transverse arm portions (9, 10) defining an opening therebetween, the opening receiving a neck (63) of the loop and having opposing strap-engaging surfaces abutting the outer side of the strap and cooperating to hold the inner side against the convex face (4) of the bar portion (71).

The invention provides a method for determining a laser peening forming process parameter of a complex curved-surface-shaped workpiece. The method comprises the following steps: according to a curved surface parameter equation of the workpiece, carrying out geometrical characteristic analysis on the curved surface of the workpiece to calculate a main strain direction so as to obtain a laser pulse scanning direction in laser peening forming; establishing a workpiece bending deformation finite element model which takes depth-direction inherent strain distribution as a deformation source, and optimizing an inherent strain field to obtain the inherent strain distribution of different positions of the workpiece along the depth direction, wherein an inherent strain direction is the main strain direction; and according to inherent strain response surface models under different laser peening forming process parameters and the inherent strain of different positions of the workpiece along the depth direction, optimizing the laser peening forming process parameters, and obtaining an optimal laser peening forming process parameter corresponding to different inherent strain fields on the surface of the workpiece. A non-elastic deformation problem can be converted into an elastic deformation problem to improve the efficiency and the precision of finite element simulation.

A system and a method are disclosed for providing a downhole mechanical energy absorber that protects downhole tools from impact loads and shock loads that occur during run-in contacts, tool drops, perforating blasts, and other impact events. A continuous localized inelastic deformation of a tube is a primary energy absorber in a load limiting design of the downhole mechanical energy absorber.

A container for breath mints and the like includes a tray and lid. The lid may be retracted to define a dispensing slot of limited width for controlled dispensing. An internal shelf may be provided to facilitate dispensing. The lid and tray are configured to resist inelastic deformation during normal use.

A member-to-member connection bracket comprising a first connection member for coupling the connection bracket to a first structural member, a second connection member for coupling the connection bracket to a second structural member; and a fuse member disposed between the first connection member and the second connection member, the fuse member comprising at least one of hinge locations. The at least one hinge location provides inelastic deformation at a pre-determined load and the pre-determined load is less than the elastic yield load of a first structural member and a second structural member. The hinge locations may have a reduced thickness. The fuse member may have a tubular cross-section. A connection utilizing the member-to-member connection bracket is also included.

A printing system configured to print an image onto a deformable cast polymer article comprising: (a) means for supporting a deformable cast polymer article in preparation for printing thereon, the means for supporting comprising a pressure platen, the deformable cast polymer comprising a finished surface to be printed on and a secondary surface; (b) an image transfer medium located contiguous with the finished surface, the image transfer medium configured to produce the image on the finished surface upon transfer of an ink image, comprising one or more inks, supported by the image transfer medium; (c) means for applying pressure to the deformable cast polymer article in the form of a deformable pressure applicator, such as a flexible membrane, the means for applying being flexible and configured to deform and conform to a surface of the deformable cast polymer article, and to cause an opposing surface of the deformable cast polymer article, under heat, to inelastically deform and conform to the pressure platen, the means for applying also being configured to cause the image transfer medium to conform to the finished surface such that substantially all of the ink image is caused to be in contact with the finished surface; and (d) means for heating at least a portion of the cast polymer to a pre-determined temperature for a pre-determined time sufficient to achieve the inelastic deformation of at least a portion of the cast polymer article, and to effectuate the transfer of the ink image to the finished surface.

A method for making a non-driving vehicle axle beam includes selecting a straight section of elongate tube of hardenable steel. The tube is cut to length, and positioned in a die cavity which corresponds to the shape of the finished axle beam. Pressurized fluid is communicated with the interior of the tube to inelastically deform the same into conformance with the shape of the die cavity. The formed tube is removed from the die and selectively heat treated at the areas of high stress during use to define the finished axle beam.

The invention relates to a manufacturing method in the technical field of bridge engineering, in particular to a method for manufacturing a high strength and large specification wire rope sling. The method comprises the following steps: (1) checking raw materials, and ensuring that a wire rope has no broken wire, no rust and the like; (2) according to the length of a workshop tensioning groove, performing optimal length matching on a long cable and a short cable to be matched into a certain length; (3) manufacturing a temporary anchorage device to ensure performing pretension; (4) performing pretension to control the inelastic deformation of the wire rope; (5) resisting corrosion; (6) cutting off a mark; (7) performing anchor manufacturing on the wire rope, and passing the wire rope into a buffer before anchor manufacturing; (8) casting an ingot by using a special conical ingot mould, and preheating the mould; and (9) performing tensioning retest on the sling according to a length matching table. The method can be applied to bridges; and according to the length of the workshop tensioning groove, the long cable and the short cable are matched to perform optimal length matching to be matched into a certain length, so that the method is favorable for performing pretension, saving materials simultaneously and reducing the bridge cost.

A cable positioning device and a charger using the cable positioning device is disclosed to include a cable positioning device mounted in a mounting structure inside the charger to secure a cable. The cable positioning device includes a polygonal column that can be forced by an external pressure to deform non-elastically and to further tightly fit the cable, having at least one surface thereof abutted against an inner wall of the mounting structure in the axial direction of the cable to prevent displacement of the cable positioning device and the internal electric wires of the cable due to accidental twisting of the external part of the cable, improving the cable installation efficiency.

The invention relates to a cable positioning element and a charging gun using the cable positioning element. The cable positioning element is suitable for mounting a cable in a mounting base. The cable positioning element includes a column of which the cross section is polygonal, and a hollow channel is formed in the column and allows penetration of the cable. The column can be stressed to produce inelastic deformation to press against the cable, and at least one side face of the column can abut against one inner wall face of the mounting base. Accordingly, the situation that due to the distortion and rotation of the cable, the cable positioning element and wires in the cable positioning element rotate can be avoided, and the assembly efficiency of the cable is improved.

The invention provides a steel trestle static load test evaluation method considering non-elastic deformation and belongs to the bridge bearing capacity test technology field. The method is characterized by using a partial loading amount to eliminate non-elastic deformation of a steel trestle, and finding a starting point of an elastic phase in a test process according to a displacement change value; and then, using a verification coefficient of a bridge effect change value caused by a residual loading amount to evaluate a bearing capacity of the steel trestle, wherein the bridge effect changevalue includes a strain change value and a displacement change value. By using the method, structural characteristics of the steel trestle are fully considered, the bearing capacity of the steel trestle can be effectively and objectively evaluated and misjudgment is reduced. A test can be performed by using a test loading vehicle after proper prepressing, resource wastes can be reduced, test safety is increased, and the method can be widely used in the field where the bearing capacity of the steel trestle is evaluated through a static load test.

The invention particularly relates to a prefabrication and construction method of a box girder in-situ pedestal, which solves the problems that cast-in-place box girders are high in cost and slow in progress and engineering construction is affected. The prefabrication and construction method includes: a, surveying lofting, performing replacement and layered compaction, and backfilling and tampering the area around an abutment; b, erecting a formwork to concrete a concrete pedestal serving as a bottom form, reserving pull bar holes on the top of the pedestal, and casting a concrete foundation around the pedestal; c, tying tie bars to fasten the bottoms of the lateral forms, using support bars to adjust the top elevation of the lateral forms, using a cup-lock scaffold to reinforce the lateral forms, and placing adjustable jacks and square timber on the top of the scaffold; d, pre-stressing the lateral forms to eliminate non-elastic deformation of a foundation and the scaffold, and correcting elevation of the foundation and the lateral forms again according to pre-stressing results; and e, sequentially installing bottom web reinforcement, inner membrane forms, top plate reinforcement and embedded parts, and pouring body concrete of the box girder. By the method, the stress effect of the forms can be improved greatly, and the prefabrication and construction method has the advantages of simple structure, reasonable design, simplicity in operation and effectiveness in use.

The invention relates to a suspended cast beam No. 0 block bracket opposite-fulcrum prepressing construction method which comprises the following steps of: respectively embedding more than one steel strand connectors along the longitudinal direction on the left side and the right side inside a bearing platform, wherein each row of steel strand connectors is provided with a plurality of steel strand connectors, the quantity of the steel strand connectors in all rows of steel strand connectors are equal, each steel strand connector is fixedly connected with the bottom end of one steel strand respectively, and each steel strand extends along the vertical direction to penetrate out the top end of the bearing platform; arranging a bracket above the constructed bearing platform; laying a bracket load distribution beam on the top of the bracket along the horizontal direction, and connecting the bracket load distribution beam with the upper parts of all the steel strands by using tool anchors and clamping pieces. The invention aims at providing a suspended cast beam No. 0 block bracket opposite-fulcrum prepressing construction method which can effectively eliminate the non-elastic deformation of the bracket and reduce the construction period, the elastic deformation value of the bracket can be accurately obtained, accurate parameters can be provided for elevations of bottom dies and vertical dies for No. 0 block construction, and the method has good economic and social benefits.