We consider the propagation of time-harmonic torsional waves in composite bi-material elastic cylinders. The interface between the core and the surrounding cladding is assumed to be imperfect: the tractions are continuous across the interface but the displacement jump is proportional to the stress acting on the interface. For torsional waves, this requires the introduction of a single constant ...

Abstract Strength is an important characteristic of material mechanical properties. Based on the microcrack model and considering internal friction effect between crack surfaces, uniaxial tensile compressive strength theoretical which can reflect anisotropy materials derived established by using initiation criteria maximum circumferential stress strain, coefficient Poisson’s ratio. By introduci...

In this paper, a thermo-mechanical model suitable for the interpretation of laser heating experiments simulating power increasing phase RIA transient on UO2 samples is detailed. The thermal includes description heat deposition sample surface and transfer within thickness radius sample. mechanical describes cracking crushing material depending loading mode (tension or compression dominated) temp...

• Autogenous laser welding produces concave end-crater in 17–4 PH that is prone to solidification cracking. Solidification cracking at weld causes leakage. The use of novel zigzag power ramp-down profile significantly shorter, discontinuous, and leakage free cracks. An analysis presents a problems automotive pressure sensor, caused by crater A two-beam (TBLW) was used circumferential weld, whic...

As a part of damage tolerance assessment, the goal this research is to estimate two-dimensional crack propagation trajectory and its accompanying stress intensity factors (SIFs) using adaptive finite element method. The code was developed Visual Fortran language. advancing-front method used construct an mesh structure, whereas singularity represented through construction quarter-point single el...

the cracked brazilian disc (cbd) specimen is widely used in order to determine mode-i/ii and mixed-mode fracture toughness of a rock medium. in this study, the stress intensity factor (sif) on the crack-tip in this specimen is calculated for various geometrical crack conditions using the extended-finite element method (x-fem). this method is based upon the finite element method (fem). in this m...

Thermal fracture is prevalent in many engineering problems and one of the most devastating defects metal additive manufacturing. Due to interactive underlying physics involved, computational simulation such a process challenging. In this work, we propose thermo-mechanical phase-field model, which based on thermodynamically consistent derivation. The influence different coupling terms as damage-...

This study evaluates the feasibility of using antenna array to detect crack defects in metal pipes. Antenna arrays are set at port a pipe radial direction, and microwave signal can be effectively coupled into pipe. It produce orbital angular momentum (OAM) waves. The cracks will change transmission characteristics, they inspected by time domain reflectometry (TDR) vector network analyzer (VNA)....

Abstract The suspected circumferential weld defects found in the pipeline inspection process were tested and studied. It was that there slag inclusion girth at 9 o’clock, which had not been early stage or laboratory nondestructive testing process. are most likely due to incomplete removal between layers low welding wire energy. There a root crack 6 o’clock position of weld, length 10 mm, close ...