7 results about "Spall" patented technology

The invention relates to the technical field of composite material testing, in particular to a recycling method and device for composite material tensile fragments, and the method comprises the steps that the bottom of a protective cover is adjusted to a preset inclination angle through an angle adjusting mechanism; covering a protective cover outside a clamping block for clamping the composite material in the tensile test device, so as to collect fragments generated in the tensile process of the composite material through the protective cover; the fragments in the protective cover are blown to the bottom of the protective cover through a plurality of air injection assemblies; and the fragments at the bottom of the protective cover are adsorbed through the movable suction cup and transferred to a preset recycling area outside the protective cover. According to the technical scheme, splashing fragments can be blocked through the protective cover, the fragments are guided to fall to the bottom of the protective cover in a concentrated mode, meanwhile, the fragments attached to the side wall of the protective cover and clamped in the grooves of the clamping blocks are blown through the air injection assemblies, and the collection efficiency of the composite material tensile fragments is improved.

The application provides a kind of anti-explosion glass compression resistance performance multidimensional analysis method, belongs to the technical field of testing the strength characteristics of solid materials by applying pressure, the method comprises: in the process of applying compression load to anti-explosion glass sample by pressure head, hardware synchronous trigger and parallel acquisition three-dimensional force-displacement time history signal of compression contact surface, high-speed full-field strain image sequence of sample back and piezoelectric sensor array vibration waveform signal;Time-frequency analysis on vibration waveform signal, match strain concentration area to identify micro-crack propagation, interlaminar delamination and other damage events, quantify the distribution ratio and evolution process of work done by external force in structural deformation, material damage dissipation and fragment splashing kinetic energy during compression process;Calculate effective energy dissipation ratio, dominant failure mode evolution sequence and other indicators to generate dynamic evolution spectrum of compression resistance performance.The application realizes the accurate evaluation of the protection efficiency, failure mechanism and critical point of anti-explosion glass under compression load.

The application discloses a kind of plating adhesion detection system and detection method, belong to metal material surface plating detection technical field.Detection system includes deformation mould, flat mould and hydraulic press, deformation mould includes bi-convex upper die and bi-concave lower die, respectively installed on hydraulic press for sample stamping deformation;Flat mould can be detachably installed on hydraulic press, for flattening after sample deformation.Detection method includes: sample is placed on bi-concave lower die, and hydraulic press drives bi-convex upper die to go down and carries out simulation stamping deformation;After sample deformation, it is placed into flat mould and flattened;Paste adhesive tape in flattening area and tear, observe whether to take out plating fragment to judge adhesion.The application truly simulates the composite stress under the condition of stamping R angle or flanging by bi-convex upper die and bi-concave lower die cooperation, combined with flat tape detection, with the advantages of simple structure, low cost, convenient operation, high detection accuracy, suitable for galvanizing, aluminizing steel coil production line on-site rapid off-line detection.

The invention discloses a trapezoidal blade-roller adaptive plastic film residue crushing device, and belongs to the field of agricultural plastic film residue recovery treatment equipment. The device mainly comprises a rack, a crushing assembly and a blower device, the crushing assembly comprises a crushing blade and a crushing roller, a trapezoidal protruding part is arranged at the cutting edge of the crushing blade, a friction groove matched with the protruding part is formed in the inner side of the crushing roller, and through cooperation of the trapezoidal protruding part and the friction groove, shearing and friction cooperative crushing of the residual film is achieved; discharging holes are distributed in the wall of the crushing roller in an array mode, an auxiliary tearing structure is formed on the edges of the discharging holes, the residual film is torn in the crushing process, meanwhile, residual film fragments meeting the particle size after crushing fall to an inclined discharging plate through the discharging holes and are conveyed out through an air blowing device in an auxiliary mode, and material accumulation is effectively prevented. According to the invention, through the matching of the blade and the roller profile and the tearing function of the edge of the discharge hole, the crushing efficiency and uniformity are obviously improved, and the problem of discharge blockage is solved.

The invention relates to a process in which a material (4) is extruded by means of a multi-stage extruder (1) comprising at least two extruder stages (2, 3), for which the material (4) is plasticized in a first extruder stage (2) of the multi-stage extruder (1) and subsequently transferred to a further, preferably second, extruder stage (3) of the multi-stage extruder (1), brought into a fragmented state via a splitting device (5) of the multi-stage extruder (1) and in this state is exposed to a vacuum, preferably a technical vacuum, in a vacuum chamber (6) of the multi-stage extruder (1), so that volatile components and / or trapped gases are at least partially removed from the material (4).In addition, at least one material flow and / or at least one mass pressure of the material (4) is automatically adjusted through the first extruder stage (2) and / or the further extruder stage (3) in such a way that, at least in normal operation of the multi-stage extruder (1), the vacuum zone (6) is filled with no more than a predetermined maximum volume of the material (4) permissible for the removal of the components and / or gases, and / or the fragmented state of the material (4) is maintained and / or is maintained.

A preformed composite fragmentation warhead includes preformed composite fragments tightly packed around a casing that includes an explosive. The preformed composite fragments include an inner core encapsulated with an outer jacket. The inner core and outer jacket are formed from different metal materials with the density of the material for the outer jacket being lower than the density of the material for the inner core. Upon contact with a “soft” target, the outer jacket deforms and widens to increase the diameter of the preformed composite fragment. Upon contact with a “hard” target, the outer jacket erodes or shatters allowing the inner core to penetrate the hard target. The outer jacket also serves to reduce spalling upon detonation of the warhead explosive. The outer jacket fully encapsulates the inner core to ensure that the outer jacket impacts the target.