4 results about "Incompressible material" patented technology

The invention discloses a finite element calculation method of a nearly incompressible material and computer equipment, and the finite element calculation method comprises the following steps: constructing a geometric model, endowing parameters of the nearly incompressible material to the geometric model, endowing boundary conditions and loads to the geometric model, and obtaining a finite element parameter model of the nearly incompressible material; performing mesh generation on the finite element parameter model according to a pre-selected unit type to obtain a finite element model; establishing a unit stiffness matrix of the units; assembling the unit stiffness matrix to form a global stiffness matrix; discretizing the load to generate a global node force vector, and calculating to obtain a node displacement vector; and performing post-processing by utilizing the node displacement vector to obtain displacement, stress and strain of the finite element model. According to the method, the volume self-locking characteristic of the unit is eliminated by correcting the part, related to the volume, in the shape function derivative matrix B, so that the volume self-locking problem of the nearly incompressible material in the finite element calculation process can be well solved.

An introducer sheath assembly for percutaneously delivering a medical device that maintains hemostasis in a patient. The assembly has a hub, a hub cap and a hemostasis valve. The introducer sheath assembly has a longitudinal axis and a lumen formed therein. The hemostasis valve has a frame portion and a valve portion, the valve portion having a plurality of slits that are offset through the thickness of the valve portion therein and an extension of the frame portion formed from an incompressible material. The extension of the frame portion is received by a valve seat feature in the hub, when the valve is received by the hub. The valve seat feature also receives a seating portion of the hub cap as the hub and hub cap are advanced into engagement, the seating portion of the hub cap advanced into the valve seat feature subjecting the incompressible extension of the frame portion to a compressive force.

A gear is provided with spokes (17) extending between a rim (16) supporting a gear mesh (15) and a corresponding gear hub (18), where free spaces (19) are located between the spokes (17) extending between the rim (16) and the gear hub (18), characterized in that at least one of the free spaces (19) is filled with a block (20) made of a rigid incompressible material, and the block (20) is made of a non-compressible material. Wherein a viscoelastic material (21) is positioned between the gearwheel (10) on the one hand and the block (20) on the other hand.

A fabric item that comes into repeated contact with a staining agent may be provided with anti-soiling features to help prevent the staining agent from transferring to the fabric. The fabric item may be a case or strap for an electronic device or may be an integral portion of an electronic device. The anti-soiling features may include a raised lip of material having a higher elastic modulus than the fabric. The anti-soiling features may include an incompressible material (e.g., fused fabric, fabric impregnated with adhesive, or non-fabric materials such as metal or glass), edge piping, molded fabric, protruding ridges, stitches covered with welt, a recess that receives a cord of a removable strap, and / or compressible fabric regions. An internal frame member may protrude through the fabric or may press on an inner surface of the fabric to form anti-soiling features.