An equivalent circle is proposed to represent a square contact area.
Within the image analysis, two parameters of particle size analysis were applied: MeanFeret's diameter and an equivalent circle diameter.
On the maps the projected surface of the particles is measured and a diameter calculated by the equivalent circle area.
The anorthite grain size traced along the glass materials in the BSE images is ~ 3 μm (equivalent circle diameter).
The equivalent circle diameter of the polyethylene wear particles from the processed surface was more than two-times larger than that using a conventional mirror finish surface.
For the blank material located in the corner flange area, a concept of "equivalent circle" was put forward to simplify the stress analysis.
The wear generated by the LC S®knee design (XPE and UHMWPE) had a higher percentage fraction of particles >1 μm in size (equivalent circle diameter).
In this report, freezing dry APCS (FD-APCS) biomaterials containing pores with different sizes were fabricated at different pre-freezing temperatures of −10, −80 or −198 °C, and the percentage of large pores (equivalent circle diameter ≥ 10 μm) was 93.55%, 69.36%, 35.79%, while the small pores (<10 μm) were account for 6.45%, 30.64%, 64.21%, respectively.
Their respective grain sizes, estimated as the equivalent circle diameters (ECD) from the high-resolution TEM micrographs with the corrected sample standard deviations, are within the range of 14.1 ± 3.7 nm and 10.0 ± 2.9 nm for LiCl and Mn(BH4 2, respectively.
The pore sizes were determined to an equivalent circle diameter of about 30 to 110 μm.
For each region, an equivalent circle was created, and this circle has the same area as the labeled region.
