The SEM analyses were carried out on the surface and cross section fractures of the nanoscratch tracks.
Complete cross-section fracture on the shear plane of CFRP tendons has not occurred, and the tendons can still have some transverse bearing capacity after shear failure.
The coatings were investigated based on the observation and measurement of the working voltage, surface microdischarges and morphologies of surface, polished cross-section, fracture cross-section and inner surface of the coatings, by using scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectroscopy (EDS), data acquisition module, single-lens reflex camera.
Without local deformation and stress concentration at contact points between the extensometer and the specimen surface in strain-controlled fatigue tests, the crack initiation and propagation were studied by SEM examination of specimen surface with replication technique, longitudinal cross section and fracture surface.
Central aspects of the research project are microscopic studies of the joining zone in cross section and extensive fracture surface analysis.
Carr et al. [46] observed SSD of optical glasses from the cross section of a fracture part with a scanning electron microscope.
Besides, the image analysis related to fracture mode at splitting cross section indicated that adhesive fracture was dominant at lower temperature, while at higher temperature the main fracture mode was cohesive fracture.
From Eq. (4), it can be seen that the fracture cross section is a slim ellipse determined by the fracture half length a, E, K Ic, and independent of the pressure distribution in it.
As a consequence, the observed settling rates were greater when proppant had migrated into a central column than when it remained uniformly distributed across the fracture cross section.
If the deposition time is increased to 25 min, the formation of small islands can be identified in the surface SEM image (Fig. 1(c)) and the corresponding fracture cross section (Fig. 1(d)).
In this regard, the definition of impending fracture is controversial: when destruction is greater than 75% of the bone's cross section, the risk of spontaneous fracture is great [5].
