Micro-hole drilling and cutting in ambient air are presented by using a femtosecond fiber laser. At first, the micro-hole drilling was investigated in both transparent (glasses) and nontransparent (metals and tissues) materials. The shape and morphology of the holes were characterized and evaluated with optical and scanning electron microscopy. Debris-free micro-holes with good roundness and no...

Investigating the thermal decomposition characteristics and mechanisms of nano- submicron-aluminized 1,3,5-trinitro-1,3,5-triazine (RDX) is essential to optimize formulations improve combustion/detonation efficiencies. However, no research has focused on microscopic scale a single aluminized RDX particle. We demonstrate an all-fiber probing method for violent nano-aluminized micron-RDX particle...

Braided composites contain interwoven fibers that are embedded in a matrix material. Advanced measurement methods required to accurately measure and characterize braided due their composition. Micro-computed tomography (μCT) is an X-ray based method allows for the internal structure of objects be examined. High-resolution μCT geometry measured. Braid samples were measured with voxel size 1.0 μm...

Here we report the first example of a class of additively manufactured carbon fiber reinforced composite (AMCFRC) materials which have been achieved through the use of a latent thermal cured aromatic thermoset resin system, through an adaptation of direct ink writing (DIW) 3D-printing technology. We have developed a means of printing high performance thermoset carbon fiber composites, which all...

Micro-sized Al2O3-modified carbon fiber hybrid reinforced polymer composites (CFHRP) were prepared using the vacuum-assisted resin transfer molding (VARTM) process, and friction wear tests performed on an MRTR-1 multifunctional tester to study effect of surface doping with trace amounts Al2O3 its content tribological properties composites. The morphology composite material was characterized a t...

A single-fiber pull-out model composite for an aramid/epoxy system was specially designed to measure the stress distribution of the aramid fiber embedded in the matrix using micro-Raman spectroscopy. The stress transfer length of the fiber obtained was about 400-500 μm, which was equal to the result of FEM analysis. Just after the initiation and propagation of the fiber/matrix interfacial debon...