Determination of Rock Tensile Strength Based on Arc Loading Splitting Test considering Modulus Effect

Table 2

Maximum head-disc contact angle.

Material	Mudstone	White sandstone	Green sandstone	Red sandstone	Marble
Elastic modulus E (GPa)	7.35	13.43	20.62	27.40	53.58
Maximum contact angle (°)	31.5	27.7	25.3	23.1	19.0