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  • Lap Joints - The Basics
    A lap joint is formed by overlapping two plates and welding them either in the joint where they meet, as is done in GTAW and PAW, or through the top plate and into the bottom plate. This is usually done using either an electron beam or laser welder. Lap joints can be used to weld pieces
  • Welding: Flange Joints
    When very thin plates, foils or diaphragms need to be welded, it is often unfeasible to use either a butt joint or even a lap joint, on the grounds that even a minimal amount of power would burn through the pieces. In this case, a flange joint is employed. To create a flange joint, the edges
  • Seven Steps to Successful Brazing
    A strong brazed joint begins with its design. To assure maximum strength, the joint should be designed with an overlap of three to four times the thickness of the thinner member. This is the most readily accomplished by a lap joint, but where that is impractical, a scarf joint is the next best
  • Forget general-purpose software -- Get Focused
    , and a few dimensions. The handbook approach would need separate models for each design configuration. The results screen for a ninehole lap joint produces a table of maximum stresses, loads on each fastener, and resulting stress pattern. AcuRes, a collaboration of Snecma Moteurs of France
  • Laser Welding of Plastics (.pdf)
    :YAG or direct diode, depending on the type of welding application and materials. The weld joint created using the laser is a lap geometry, one that naturally reflects many plastic joint designs. The welding concept revolves around the top material being transparent to the laser, while the underlying
  • Brazing Processes
    , or shim form. Torch and machine brazing are generally used to make lap joints in sections from 0.01 to 0.25 in. thick. Joints can be brazed rapidly, but speed decreases as material thickness increases. is practical if the product is self-jigging or can be preassembled and placed in a jig; if brazing
  • Building a better adhesive bond
    being bonded. Lap joints, a simple layer on layer, are generally strongest. The length of an overlap increases strength but by decreasing amounts. Increasing the width of the overlap produces a proportional
  • Strong epoxy bonds without a hitch
    Elkhart, Ind. Araldite 2011 epoxy from The Woodlands, Tex., securely bonds aluminum, plywood, and fiberglass-reinforced plastic (FRP) panels to the vehicle sidewall frames. The epoxy cures quickly with lap shear and roller peel strengths of 2.6 kpsi and 28 pli, respectively. The epoxy stands up well

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