56 results about "Slip band" patented technology

Methods and systems of predicting fatigue life in aluminum castings that combines extreme values of both casting flaws and microstructures with multiscale life models. The multiscale life models account for differing fatigue crack initiation based on the size scale of the defect and microstructure features, including provisions for generally millimeter scale casting flaws, generally micrometer scale second phase particles by cracking or debonding, or submicrometer scale dislocation interactions with precipitates which form persistent slip bands. In the presence of casting flaws, the fatigue initiation life is negligible and the total fatigue life is spent in propagation of a fatigue crack from such flaws. In the absence of casting flaws, however, the total fatigue life is spent in both crack initiation and propagation, except for the case where fatigue cracks initiate from large second phase particles in a coarse microstructure.

The invention relates to methods and systems to predict fatigue life in aluminum castings. Methods and systems of predicting fatigue life in aluminum castings that combines extreme values of both casting flaws and microstructures with multiscale life models. The multiscale life models account for differing fatigue crack initiation based on the size scale of the defect and microstructure features,including provisions for generally millimeter scale casting flaws, generally micrometer scale second phase particles by cracking or debonding, or submicrometer scale dislocation interactions with precipitates which form persistent slip bands. In the presence of casting flaws, the fatigue initiation life is negligible and the total fatigue life is spent in propagation of a fatigue crack from such flaws. In the absence of casting flaws, however, the total fatigue life is spent in both crack initiation and propagation, except for the case where fatigue cracks initiate from large second phase particles in a coarse microstructure. The extreme values of casting flaws, second phase particles, mean free path through an aluminum matrix or grain sizes are obtained from extreme value statistics whentwo or three dimensional sizes of casting flaws and microstructure features are provided by either direct measurement or analytical prediction. The upper bound flaw or microstructure feature size is calculated by extreme value statistics.

The invention discloses a dragging twist-resistant metallic shield flexible cable for mining equipment. The flexible cable comprises a protective sleeve, a plurality of power wire cores and a plurality of ground wire cores, high-strength fibers and control wire cores, wherein each control wire core comprises a conductor, a high-elasticity rubber insulation layer and a heat-resisting thin slip band layer; the conductor is wrapped with the high-elasticity rubber insulation layer and the heat-resisting thin slip band layer; the high-elasticity rubber insulation layer is located between the conductor and the heat-resisting thin slip band layer; each power wire core comprises a conductor which is wrapped with a heat-resisting semiconductor nylon shield strip layer, an insulation layer and a heat-resisting semiconductor nylon shield strip, metal and fiber fixing weaving layer sequentially from inside to outside; each ground wire core comprises a conductor and a semiconductive elastic rubber layer, and the conductor is wrapped with the semiconductive elastic rubber layer; and outer sides of the plurality of the power wire cores and the plurality of the ground wire cores, the high-strength fibers and the control wire cores are wrapped with the protective sleeve, so that a whole is formed. The dragging twist-resistant metallic shield flexible cable is good in flexibility, tensile resistance and twist resistance and longer in service life.

The invention provides a landslide displacement prediction method improved through data assimilation. The landslide displacement prediction method comprises the steps that firstly, calculating a sliding zone integrity index according to an external influence factor-sliding zone integrity index regression model; then dividing the target landslide strip into a plurality of sliding blocks by adoptinga strip division method, calculating the position of a target landslide seepage line according to a Bcissinke equation, and further calculating by adopting a sliding zone shear strength dynamic change index formula to obtain cohesive force and an internal friction angle; then, the internal thrust of a sliding block where the monitoring point is located is calculated through a residual thrust method, and a landslide cumulative displacement value is calculated through a thrust-displacement regression model; and finally, calculating by adopting a particle filter algorithm to obtain an optimal slip band integrity index and an optimal cumulative displacement prediction value. The beneficial effects of the invention are that the method can guarantee that the landslide prediction model does notmake an overshoot response to the severe noise of an external impact factor, improves the prediction precision of the landslide displacement prediction model, and can effectively enable the predictionerror of the landslide displacement prediction model to be converged.

The invention discloses an intelligent network system which comprises at least one addressing wireless display device and a movable slip band type intelligent terminal device. The slip band type intelligent terminal device is connected with the addressing wireless display devices in a communication mode and comprises a body, a wireless module, a processing unit and at least one slip band type touch sensing structure, wherein the body is provided with a ring band, the wireless module is arranged at the body, and the processing unit is coupled to the wireless module. The slip band type touch sensing structures are arranged at the ring band and coupled to the processing unit and are used for sensing at least one trigger event to control the addressing wireless display devices. The intelligent network system is applied to communication connection between the addressing wireless display devices and the movable slip band type intelligent terminal device to expand the application range of the movable slip band type intelligent terminal device.

The present invention provides a process for upgrowth of lithium aluminate crystal to develop crystal with synthetic fused mass method, wherein a czochralski method is adopted for seminationsowing, neck receiving and shoulder putting, and a kyropoulos method and / or temperature gradient technique is adopted during the equal-diameter growth. The equipments and the modes of heating used in the process are not restricted strictly, and a czochralski equipment is adopted usually, which can be used regardless induction heating or resistance heating. Said process possess the advantages of czochralski method, kyropoulos method and temperature gradient technique: it can develop crystal with large size without much pollution, wherein the liquid level and the instances of crystal growth can be observed; it can also adopt the existent czochralski method equipment. At the same time, the process overcomes the shortcomings (such as high color centre and location erroneous rate) of the czochralski method and the temperature gradient technique, can produce crystal with excellent quality, small stress, without slip band and twins defects, with low dislocation density, with excellent crystal perfection and optical homogeneity, easy to its industrialization.

The invention discloses an antenna with a quick coupler. The antenna with the quick coupler comprises a columnar protective sleeve and a metal emission rod, and further comprises the quick coupler, wherein the quick coupler is connected with one end of the columnar protective sleeve, a signal connection column is arranged in the center of the quick coupler, a quick connection clamping groove is formed in the surface of the quick coupler, and an anti-slip band is arranged on the surface of the quick coupler. The antenna with the quick coupler has the advantages of being capable of being rapidly disassembled, quick and firm in connection and quite convenient to use in the wild.

A heat treatment method for improving fatigue resistance of Al-Cu-Mg alloy comprises: performing high-temperature short-time (505-535 DEG C / 1-25 min) solution hardening treatment on cold-rolled sheets, then performing natural aging at room temperature for 96 h or more. The aluminium alloy capable of being treated by the heat treatment method comprise the components: Cu, Mg, Ti and Al. The technology is simple and reasonable; and through high-temperature short-time solution hardening treatment, the alloy obtains relatively high goss texture components. Because most of crystal faces {111} of crystal grains in the alloy with high goss texture is positioned or close to the direction of the maximum external shearing stress, the reciprocating sliding of dislocation is promoted and a persistent slip band is easy to generate in the alloy, and thus the plasticity induction closure effect of fatigue crack is enhanced and the damage accumulation is reduced, also the crack deflection is promoted, and thus the fatigue crack spreading rate of the alloy is reduced and the fatigue resistance of the alloy is improved.

The invention discloses a riding vehicle anti-slip band. The riding vehicle anti-slip band has rough inner and outer surfaces. The periphery of the riding vehicle anti-slip band is uniformly provided with multiple positioning members used for fixing the riding vehicle anti-slip band to a wheel. Multiple rubber tacks are arranged on the inner surface of the riding vehicle anti-slip band. The multiple rubber tacks are arranged on the inner surface of the riding vehicle anti-slip band and the multiple rubber tacks can be embedded into patterns on the tyre surface after contacting with the tyre surface so that the displacement between the riding vehicle anti-slip band and a tyre is avoided and slipping is prevented.