A system and a method for measuring drilling damage in fiber reinforced plastic (FRP) composites is described. Multiple holes are drilled in the FRP composite using a drill having nominal diameter, and the FRP composite is separated into multiple drilled blocks. Each block, covered with the black substrate, is scanned on a scanner to generate a scanned image depicting a hole region, a background, and delamination damage peaks. For each scanned image, a maximum delamination damage peak and a maximum diameter of a first circle concentric with the drilled hole and passing through tip of the maximum delamination peak, are measured. Further, a delamination size and a delamination factor are calculated based on the maximum diameter of the first circle and the nominal diameter of the drill.

A method for manufacturing a metal-resin joint 30 according to the present disclosure is a method for manufacturing the metal-resin joint 30 in which a synthetic resin member 10 made of thermoplastic resin and a metal member 20 made of metal are bonded to each other, the method including: a first process of exposing a surface 12 of the synthetic resin member 10 molded into a predetermined shape, to air heated to a first temperature T1 equal to or higher than a deflection temperature under load Tf of the thermoplastic resin when a load of 1.8 MPa is applied; and a second process of bonding the surface 12 of the synthetic resin member 10 and a surface 22 of the metal member 20 to each other. Accordingly, it is possible to improve the bonding strength between the metal member 20 and the synthetic resin member 10.

What is provided is a new and improved metal-carbon fiber reinforced resin material composite in which the galvanic corrosion of dissimilar materials of a metal member is suppressed and electrodeposition coatability is excellent and a method for manufacturing the metal-carbon fiber reinforced resin material composite. A metal-carbon fiber reinforced resin material composite according to the present invention has a metal member, a resin coating layer disposed on at least a part of a surface of the metal member, and a carbon fiber reinforced resin material containing a matrix resin and a carbon fiber material present in the matrix resin, the resin coating layer contains any one or more kinds selected from the group consisting of metal particles, intermetallic compound particles, conductive oxide particles, and conductive non-oxide ceramic particles as conductive particles and further contains a binder resin, and the conductive particles have a powder resistivity at 23° C. to 27° C. of 7.0×10.sup.7 Ω.Math.cm or less and contain one or more selected from the group consisting of Zn, Si, Zr, V, Cr, Mo, Mn, and W.

A heat sealing machine may include a heater assembly, a heat plate lock assembly supporting a heat plate in proximity to the heater assembly, and a lock mechanism allowing the heat plate lock assembly to alternately open and close. The heat plate may be replaced by a second heat plate by moving the lock mechanism to a retracted position, moving a heat plate lock assembly to move the first heat plate away from the heater assembly, removing the first heat plate from the heat plate lock assembly, inserting the second heat plate into the heat plate lock assembly, moving the heat plate lock assembly to move the second heat plate into engagement with the heater assembly, and moving the lock mechanism to a locked position to maintain the engagement between the second heat plate and the heater assembly.

A method of mechanically securing a first object including a thermoplastic material in a solid state to a second object with a generally flat sheet portion, with a perforation of the sheet portion, and with the sheet portion having an edge along the perforation is provided, wherein the first object is positioned relative to the second object so that the edge is in contact with the thermoplastic material and wherein mechanical vibration energy is coupled into the assembly including the first and second objects until a flow portion of the thermoplastic material due to friction heat generated between the edge and the thermoplastic material becomes flowable and flows around the edge to at least partially embed the edge in the thermoplastic material. After the mechanical vibration stops, the thermoplastic material is caused to re-solidify, whereby the re-solidified thermoplastic material at least partially embedding the edge anchors the first object in the second object.

[Problem] To provide a metal/fiber-reinforced resin material composite in which a metal member and a fiber-reinforced resin material are firmly bonded, a light weight and excellent workability are obtained while the strength is enhanced, and the amount of the fiber-reinforced resin material used can be reduced. [Solution] A metal/fiber-reinforced resin material composite comprising a metal member, and a first fiber-reinforced resin material having a matrix resin and a reinforcement fiber material, the metal member and the first fiber-reinforced resin material being formed into a composite with an adhesive resin layer interposed therebetween, wherein the adhesive resin layer is obtained by solidifying or curing an adhesive resin composition containing at least 50 mass parts of a phenoxy resin (A), and the maximum load of the metal/fiber-reinforced resin material composite is greater than the total load of the maximum load of the metal member alone and the maximum load of the fiber-reinforced resin material alone (i.e., so as to display a “super-law-of-mixture (or law of over-mixture)” that surpasses the law of mixture with respect to the tensile load).

A metal-resin bonded article includes a composite laminate including a metal base material having laminated thereon one layer or plural layers of a resin coating layer, and a resin material bonded and integrated thereto, the resin coating layer being laminated on a surface-treated surface of the metal base material, at least one layer of the resin coating layer containing a resin composition containing a linear chain polymer having a linear polymer structure polymerized on the metal base material, a bonding strength between the composite laminate and the resin material and an adhesion force between the metal base material and the resin coating layer satisfying particular conditions.

The relates to a method of mechanically securing a first object to a second object and includes the steps of: providing the first object including thermoplastic material in a solid state, providing the second object with a generally flat sheet portion having an edge, positioning the first object relative to the second object and bringing the first object and the second object to a relative movement to each other. The relative movement includes a rotational movement, such that a melting zone including flowable thermoplastic material is formed and such that thermoplastic material of the melting zone flows around the edge to at least partially embed the edge in the thermoplastic material. The invention further concerns a connector that is suitable for being used in a method according to the invention.

In a preferred embodiment, a composite panel with a smooth outer surface, ready for painting with or without addition of primer, may be created by constructing a panel layup assembly upon a mold, the panel layup assembly including a composite panel having a core and a resin formulation, and a release film between the mold and the composite panel, where a smooth release surface of the release film is in contact with the composite panel upon construction; initiating curing of the composite panel at a first temperature within a lowermost ten percent of a curing temperature range of the resin formulation; continuing curing of the composite panel at a second temperature above the lowermost ten percent of the curing temperature range; and completing curing of the composite panel at a third temperature below the second temperature.

In a preferred embodiment, a composite panel with a smooth outer surface, ready for painting with or without addition of primer, may be created by constructing a panel layup assembly upon a mold, the panel layup assembly including a composite panel having a core and a resin formulation, and a release film between the mold and the composite panel, where a smooth release surface of the release film is in contact with the composite panel upon construction; initiating curing of the composite panel at a first temperature within a lowermost ten percent of a curing temperature range of the resin formulation; continuing curing of the composite panel at a second temperature above the lowermost ten percent of the curing temperature range; and completing curing of the composite panel at a third temperature below the second temperature.