A three-dimensional (3D) finite element (FE) model is applied to predict the temperature evolution in the laser welding of galvanized high-strength steels in a zero-gap lap joint configuration. A rotary Gaussian volumetric heat source model is introduced to simulate the laser energy input. The temperature data measured by thermocouples are used to verify the boundary conditions of the thermal m...

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...

At the initial phase of the mechanical product development, it is very important to effectively obtain the modal damping ratio of the bolted joint structure for accurately predicting dynamic response. The energy dissipation has been estimated using a finite element model incorporating the effect of pretension force of the bolted joint. First, the modal damping ratios of the first four modes are...

This paper summarizes fatigue test on high strength steel specimens in the as-welded condition and specimens treated by ultrasonic impact treatment, TIG dressing and a combination of TIG dressing and ultrasonic impact treatment. Single lap joint specimens in 6 mm aluminium plate material were tested in the as-welded, hammer peened, needle peened and ground condition. Aluminium joints with longi...

Modal analyses are essential steps in structural design. Simple and quick numerical procedures design tools for modal dynamic analysis of bonded joints would be an attractive option to increase the efficiency process its early phases. This paper offers a simple tool dedicated single lap with balanced unbalanced adherends various boundary conditions. Based on macro-element technique developed Ta...

A wide variety of adhesive joints architectures is available, offering several options to the designers, although most common are single-lap (SLJ), double-lap joints, and scarf joints. Additional designs, less used studied stepped-lap, T-joints tubular find application in different types industry, such as aircraft bond stiffeners skin cars between B-pillar rocker. This work numerically evaluate...

Abstract. This paper presents the concept of concentric peripheral joint. Designed joint was projected to laser welding process, where using keyhole effect deep penetration trough three materials presented. Concept includes elastic stainless steel material as an connector between two pipes. Stainless in form a ring used additional distance element, joined with Presented investigated numerical s...

For adhesively bonded joint security and long-term use of the joint, a precise stress analysis must be performed on single-lap joints. A formed by joining two layers at given lap length, is most widely used adhesive type in practice. Nowadays, it stated that mechanical properties strength can increased adding clay graphite to polymeric material joints, trying estimate for various loading condit...