Abstract Application of high‐strength steel on different structural components is becoming more attractive. In spite their great advantages high yield strength, the use these grades faces some important challenges as well. There are many formed structures that subjected to fatigue loading conditions. The main objective present study investigate effect pre‐bending process low‐cycle For this purpose, a new test set‐up has been designed take into consideration when load applied. To detect crack...

A multimode Tonpilz transducer is well-known for providing a wider bandwidth than single-mode transducer. In this paper, new structure the head mass of was designed to further widen bandwidth. The mechanical quality factor proportional weight its mass. that sense, making cavity inside will surely lead much lighter mass, which can lower factor, thus Through finite element analyses, effects void on performance were analyzed, and dimension achieve widest determined within given structural...

The application of High Strength Steel (HSS) on different structural components is becoming more attractive. They have a fine grain structure, low carbon content for improved weldability, and controlled internal purity. These steel grades are frequently used applications. There lot the considered applications that subjected to bending fatigue loading conditions, respectively. It well known under critical cyclic stress, which exceeds material yield can occur at some locations such as inner...

It has been well-known that a multimode transducer could provide wider frequency bandwidth than single mode one, and conventionally can be achieved by designing the geometry of its head mass, increasing mass radius reducing thickness. However, very large cause some drawbacks to performance when used in an array, i.e., low source level big crosstalk with neighboring elements. In this work, new simple design method developed widen Tonpilz transducer, which is replacing uniform PZT layer stack...

Multimode Tonpilz transducer is well-known for providing a wider bandwidth than single-mode transducer. In this paper, new structure of the head mass multimode was designed to further widen bandwidth. The mechanical quality factor in inverse proportion weight mass. Making cavity inside will surely lead lighter mass, which can lower thus Through finite element analyses, cross-coupled effects void on performance were analyzed. Then functional forms derived relation and inserted into genetic...

Fatigue behaviour is most commonly evaluated in uni-axial cyclic stress tests using standardised dog-bone samples. When components are sharply bent into shape and subjected to loading, the fatigue damage will accumulate at inside of bend. This paper reports on an experimental investigation about feasibility infrared thermographic techniques monitor initiation accumulation. By monitoring spectral thermal response, limit, onset crack ratio propagation lifetime can all be determined. Also...