Mechanical fasteners especially bolting is commonly used in joining carbon-fiber reinforced polymer (CFRP) composite structures due to their good joinability and easy for maintenance characteristics. Since this approach involves with notching, a proper progressive damage model (PDM) need to be implemented and verified to capture existence of damages in the structure. A three dimensional (3D) fa...

Laser welding affords many advantages during the manufacture of EV battery packs. Aluminum (Al) and copper (Cu) are welded using a dual laser beam with core ring different powers. Given very high reflectance Cu Al exposed to near-infrared lasers, materials absorb only small amounts energy. Compared single-beam welding, dual-beam significantly improves surface quality by controlling solidificati...

A pulsed Nd:YAG laser with a fiber optic delivery system was used to accomplish dissimilar joining of 316 stainless steel (SUS316) polyethylene terephthalate (PET). Laser Conduction Welding (LCW) applied as welding technique achieve lap metal/polymer joint by applying the from metal side. The heat transferred layer polymer layer, which caused melting and then solidifying at interface. effect th...

The effect of through-thickness reinforcement by thin 1 mm steel needles (z-pins) on the static tensile strength of double-lap joints of a carbon/epoxy composite was investigated. Two types of joints-z-pinned and hybrid (including glued ones)-were considered. The joints were reinforced in the overlap region with 9, 25, or 36 z-pins. Comparing mechanical properties of the double-lap joints with ...

Article history: Received: 03.10.2014. Received in revised form: 19.12.2014. Accepted: 30.12.2014. In this work, the effect of adherend shape on the tensile strength of adhesively bonded single lap aluminum structures joint was numerically studied using three dimensional finite element models. Six joint models were investigated. In this paper, a static finite element analysis was performed in A...