Kenaf (Hibiscus cannabinus L.; Family: Malvaceae), is multipurpose crop, one of the potential alternatives of natural fiber for biocomposite materials. Longer fiber and higher cellulose contents are required for good quality biocomposite materials. However, average length of kenaf fiber (2.6 mm in bast and 1.28 mm in whole plant) is below the critical length (4 mm) for biocomposite production. ...

AIM The aim of this study was to determine the effect of short fiber volume fraction and fiber length on some mechanical properties of short fiber-reinforced composite (FRC). METHODS AND MATERIALS Test specimens (2 x 2 x 25 mm3) and (9.5 x 5.5 x 3 mm3) were made from short random FRC and prepared with different fiber volumes (0%-22%) and fiber lengths (1-6 mm). Control specimens did not conta...

Fiber materials have advantages such as light weight and high strength, corrosion resistance, fatigue easy processing production, they are widely applied in the repair renovation of concrete structures. To promote construction convenience fiber materials, raw yarn is continuously braided to form fiber-belt-bars. Based on existing research, performance bonding between fiber-belt-bars a interface...

Cotton [Gossypium spp.] fiber quality quantitations at the boll, locule, or seed level are limited by the large sample-size requirements of commercial cotton fiber testing instrumentation and inherent biases and high costs in time and labor of non-instrumental measurement methods. Quantitative examinations of the natural and environmentally induced variations in fiber properties were performed ...

A procedure to calculate the spatial fiber length in discontinuously reinforced composites from data of conventional metallographical images is developed. The method is based on the following three assumptions: first, the measured length of a reinforcing fiber in a metallographical picture is a projection of the actual fiber length; second, the alignment of short fibers is axially symmetrical (...

It is known that the single-modal Weibull model describes well the size effect of brittle fiber tensile strength. However, some ceramic fibers have been reported that single-modal Weibull model provided biased estimation on the gauge length dependence. A hypothesis on the bias is that the density of critical defects is very small, thus, fracture probability of small gauge length samples distrib...

A Tm:germanate fiber laser produced >0.25 mJ/pulse in a 45 ns pulse. It is capable of producing multiple Q-switched pulses from a single pump pulse. With the addition of a diffraction grating, Tm:germanate fiber lasers produced a wide, but length dependent, tuning range. By selecting the fiber length, the tuning range extends from 1.88 to 2.04 μm. These traits make Tm:germanate lasers suitable ...