Bonding/Welding

Pressure Vessels 1 Jul 2010

Third-party tests support claims for crosslinking spray adhesive

Aerospace manufacturers that adopt vacuum infusion processes are discovering what processors of boat hulls and wind turbine blades already know: Placement of multiple plies of slippery dry fiber reinforcements in molds with vertical sides or tight radii is problematic.

Bonding/Welding 7 Jun 2010

Third-party tests support claim for crosslinking spray adhesive

Tests support Westech's claim that its InfuZene spray adhesive crosslinks with vinyl ester, polyester or other styrenated thermoset resins during infusion.

Design and Testing 30 Apr 2010

Block shear strength of adhesive bonds

Dr. Don Adams describes two methods (ASTM D 905 and ASTM D 4501) for loading adhesive bonds in direct shear while minimizing undesirable peel and through-thickness tensile stresses.

Weaving 1 Nov 2007

Critical fiber sizing

To achieve desirable properties in composite components, adhesion between fiber and matrix must be optimized. Adhesion requires sufficient saturation with resin (wetout) at the fiber/matrix interface. To ensure good adhesion, attention must be given to fiber surface preparation, such as the use of a surface finish or

Out of Autoclave 1 Jun 2007

Bonding Technology: Thermosetting Structural Adhesives

A wealth of epoxies, polyurethanes and acrylics speed assembly and cut manufacturing cost in an ever-wider range of composites applications.

Bonding/Welding 1 Mar 2007

Testing Tech: Adhesion testing of sandwich panels

In my three preceding columns, I discussed the testing of sandwich panels as unit structures. This included flexural and shear testing of beams and panels. However, such tests — and hardware components that are designed accordingly — will not produce the desired results unless the adhesives that hold these panels

Adhesives 1 Feb 2006

BMWs Carbon Fiber Roof Attached With Polyurethane Adhesive

Automaker BMW stepped outside the box when it recently adhesive bonded carbon fiber/epoxy roofs to 1,500 limited-edition BMW M3 CSL sedans. The automaker wanted to enhance the car's performance by shedding as much weight as possible — other composite components include the doors, front skirt, trunk lid and rear bumper