Insufficient bearing capacity of compression bars in space grid structures can significantly reduce the collapse resistance and cause immeasurable losses. Reactive powder concrete (RPC) with high strength, micro-expansion, good ductility is used to reinforce members by infilling steel tubes. Axial tests on five types high-frequency welded pipes different section sizes initial stresses were carr...

This work aims to address the severe film detachments from surface of boiler steel in thermal power plants after steam corrosion attacks, especially as accumulated detached oxide layers are prone block tubes, reducing their heat transfer efficiencies. The operational conditions a typical were simulated with TP347H experimental material. Gravimetry, metallographic analysis, and scanning electron...

Insects breathe using an extensive network of flexible air-filled tubes. In some species, the rapid collapse and reinflation of these tubes is used to drive convective airflow, a system that may have bio-inspired engineering applications. The mechanical behavior of these tracheal tubes is critical to understanding how they function in this deformation process. Here, we performed quasi-static te...

In this study, the deformation and energy absorption characteristics of a novel hybrid tube is investigated both experimentally numerically. The architecture proposed composed an inner conventional co-axially arranged outer auxetic tube. Quasi-static compressive tests were conducted on tubes, tubes tubes. A three-dimensional digital image correlation technique was used to monitor evolution radi...