Composite joint geometries

Prediction diagrams bring together information on material composition (CE level), plate thickness, and joint geometry (combined thickness) so that preheat levels and heat inputs can be selected for successful welding. 

Colhngs TA. On the hearing strength of CFRP laminates. Composites 1982 13 241-52. Cooper C, Turvey GJ. Effects of joint geometry and holt torque on the stmctural Performance of single holt tension joints in Pultmded GRP Sheet material. Compos Stmct 1995 32 217-26. 

In case of bonded composite joints, the non-uniform stress distribution along the bonding surface should always be accounted for. The peak stress is mainly dependent on the bonding pattern of the joint, adhesive thickness, bonded length, joint geometry, adherend stiffness imbalance, ductile adhesive response, and the composite adherends. 

Cooper C and Turvey G J (1995), Effects of joint geometry and bolt torque on the structural performance of single bolt tension joints in pultruded GRP sheet material. Composite Structures, Vol. 32, Nos. 1, pp. 217-226. 

Thus, the metallurgy of welds, comprising the weld metal and surrounding heat-affected zone, is influenced not only by the composition of the materials involved, but also by the welding process, the specific procedures for applying the process, and the heat-transfer characteristics (deterrnined by material, mass, and geometry) of the welded joint (9—12). 

To which extent metal is degraded by hydrogen is influenced by strain (tension, frequency, stretch velocity), specimen geometry (notches, bad welds, geometric inhomogeneities), the medium (pressure variation, temperature, impurities), and material (chemical composition, fabrication, heat treatment, welding joints) [67]. 

A single lap joint involving laminated (cross-ply) composite adherends and nonlinear viscoelastic adhesive, and subjected to an end displacement, is analyzed. The geometry, loading, and boundary conditions of the problem are shown in Figure 14. The orthotropic material properties of the adherends are... 

A micro-model for masonry joints is usually composed by three individual yield functions, consisting of the usual Coulomb friction criterion for shear, combined with tension and compression cutoffs. A macro-model for the masonry composite must permit to reproduce the results obtained in uniaxial tests, with distinct behavior obtained along different directions. Finally, homogenization techniques require as input the geometry of the units and joints, as well as their mechanical properties. The most successful applications are based on micromechanical models that perform a simplified single-step homogenization because a close form solution is not available. 

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