How to Calculate Board Side Pressure, Ring Pressure and Vertical Pressure Strength

How to Calculate Board Side Pressure, Ring Pressure and Vertical Pressure Strength

A. Compression strength at vertical edges is calculated by N/m

F × 103
R = ........... Formula (1)
L
Where: R — vertical edge compressive strength N/m ;
F - maximum force value , N ;
L - Size of the long edge of the pattern, mm .

B. Calculating method of ring crush strength ( calculating the average of vertical and horizontal force respectively ) :
F
R = ............. Formula (2)
152
Where: R - ring pressure strength, kN / m ;
F - the force reading when the sample is crushed, N;
152 - specimen length, mm
Report average ring pressure R, accurate to 0.01kN/m

If necessary, the ring pressure strength index can be calculated according to equation (3) to the nearest 0.1N • m/g .
1000R
Rd= ............... Formula (3)
W
In the formula, Rd —Cylindrical compressive strength index, N • m/g ;
R — Ring pressure strength: kN/m
W - quantitative, g/ m2 .

C. Measurement of vertical compression strength

F
R = .............. Formula (4)
150
In the formula, R - compressive strength, kN/m ;
F - the force value read when the sample pressure, N ;
150 - specimen length, mm
Reported average pressure intensity R , exact value 0.01kN/m

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