105 results about "Dynamic strength" patented technology

The invention discloses an adhesive for an automobile disc brake pad and a preparation method thereof, which have stable system, heat resistance and high dynamic strength. The adhesive for the automobile disc brake pad consists of 100 parts of silicone modified phenolic resin, 5-10 parts of toughened material, 1-7 parts of curing agent, 2-5 parts of auxiliary agents and 100-300 parts of solvent. The invention solves the problems of unstable system, bad high-temperature stability, short retention time and bad use technological property of the existing brake pad. The adhesive for the automobiledisc brake pad of the invention is obtained by placing phenol, formaldehyde and organic organoacetoxysilane together to carry out polymerization reaction, dehydrating, adding organic solvent and toughened system and stirring. The adhesive for the automobile disc brake pad of the invention is prepared according to the following steps of: 1, polymerization reacting; 2, cooling and dehydrating; and 3, adding the toughened system and other auxiliary agents, and stirring to prepare the adhesive for the automobile disc brake pad, which has good high-temperature stability and uniform distribution.

A diagnostic means to enable real-time inspection of bonded structures. The disclosed apparatus detects bond failure stress waves on-axis from the front side (beam application side). Pi-box and pi-rail EMAT gauges can be used with the disclosed apparatus. An inductively coupled EMAT may also be employed. An improved means to remotely deliver an interrogating laser beam to a surface is provided. The process head may utilize a water column or a water film. The water film process head may include the use of either a single water film or two spaced apart water films. The disclosed apparatus can be used with bonded composite structures, bonded structures using various materials, and to determine the dynamic strength of unbonded solid materials. The apparatus may also be used in other applications that require remote flexible delivery of a localized stress wave to a material and / or diagnosis of the resultant stress waves.

An Al / Cu / Mg / Mn alloy for the production of semi-finished products with high static and dynamic strength properties has the following composition: 0.3–0.7 wt % silicon (Si), max. 0.15 wt. % iron (Fe), 3.5–4.5 wt % copper (Cu), 0.1–0.5 wt. % manganese (Mn), 0.3–0.8 wt. % magnesium (Mg), 0.5–0.15 wt % titanium (Ti), 0.1–0.25 wt % zirconium (Zr), 0.3–0.7 wt. % silver (Ag), max. 0.05 wt. % others individually, max 0.15 wt. % others globally, the remaining wt. % aluminum (Al). The invention further relates to a semi-finished product made for such an alloy and a method of production of a semi-finished product made for such an alloy.

An alloy having an α′ martensite which is a processing starting structure is hot worked. The alloy is heated at a temperature increase rate of 50 to 800° C. / sec, and strain is given at not less than 0.5 by a processing strain rate of from 0.01 to 10 / sec in a case of a temperature range of 700 to 800° C., or by a processing strain rate of 0.1 to 10 / sec in a case of a temperature range of 800° C. to 1000° C. By generating equiaxial crystals having average crystal particle diameters of less than 1000 nm through the above processes, a titanium alloy having high strength and high fatigue resistant property can be obtained, in which hardness is less than 400 HV, tensile strength is not less than 1200 MPa, and static strength and dynamic strength are superior.