TYPES OF JOINTS

During assembling or production of the structures, it is possible to make two types of joints:

BONDED JOINTS

MECHANICAL JOINTS

Glued connections

Adhesive couplings

Whenever possible, it is desirable to combine adhesives with any other coupling mediums. There is a variety of different formulas for coupling agents. Below there are listed the agents, which are mainly used with fiberglass composite:

Epoxy (for instance, Araldite 2000 adhesives line)

  1. Acrylic
  2. Polyester.
Adhesive usage advantages
More evenly equalizes the load
Smooth surface
Reduces weight
Joins heterogeneous materials (metals, concrete)
Ensures tightness of coupling
Smoothes different temperature propagation
Mechanical connections

SCREW

BOLT AND NUT

SUPER STUD!/NUTS!

BOLTS AND THREADED HOLE

LAG SCREW

TUBULAR RIVET

SOLID RIVET

BLIND RIVET

NYLON RIVET

T-RIVET (Aluminium)

DRIVE RIVET (Aluminium)

DRIVE RIVET (Nylon)

BLIND THREAD INSERTS

BLIND THREAD INSERTS

CLEVIS AND PIN (Metal)

CLEVIS AND PIN (Nylon)

Hole Placing for bolts and rivets

Recommendations on Twisting Level

Bolt Connections Shearing Strength (kN)

Strength (Р) in kN in longitudinal direction

Strength (Р) in kN in lateral direction

Bolt Connection Tensile/Compression Strength

Bolt Connection Tensile/Compression Strength


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Glued connection strength

There are four main types of stress impacting on the coupling:

Splitting and flakingare specific cases of pulling stress, which includes wide angles of stress on the coupling. Couplings at direct shear and expansion are more lasting and safer than at splitting and flaking.

The load symmetry should be on a high level. (This axiom is true for any materials and joints, for instance, such as bolting and welded joints.)

Surface preparation
  1. Remove the laminated surface film (abrasive paper, light sanding).
  2. Dust.
  3. Wipe the surface using solvent (solvent naphtha, white spirit or toluene in proportions as recommended by the manufacturer).

Adhesion (follow advices of the adhesive manufacturer).

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