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The ground pressure of motorized vehicles is often compared with the ground pressure of a human foot, which can be 60 – 80 kPa while walking or as much as 13 MPa for a person in spike heels. [ 3 ] Increasing the size of the contact area on the ground (the footprint ) in relation to the weight decreases the unit ground pressure.
In the International System of Units (SI), the unit is the pascal (Pa) (or a multiple thereof, often megapascals (MPa), using the SI prefix mega); or, equivalently to pascals, newtons per square metre (N/m 2). A United States customary unit is pounds per square inch (lb/in 2 or psi). Kilopounds per square inch (ksi, or sometimes kpsi) is equal ...
A centipoise is one hundredth of a poise, or one millipascal-second (mPa⋅s) in SI units (1 cP = 10 −3 Pa⋅s = 1 mPa⋅s). [4] The CGS symbol for the centipoise is cP. The abbreviations cps, cp, and cPs are sometimes seen. Liquid water has a viscosity of 0.00890 P at 25 °C at a pressure of 1 atmosphere (0.00890 P = 0.890 cP = 0.890 mPa⋅s).
The offset value is given as a subscript, e.g., = MPa or = MPa. [15] For most practical engineering uses, is multiplied by a factor of safety to obtain a lower value of the offset yield point. High strength steel and aluminum alloys do not exhibit a yield point, so this offset yield point is used on these materials.
The operating pressure of the space suit is maintained at 4.3 psi (30 kPa) (0.3 atm ~ one third of Earth atmospheric pressure) during extravehicular operations, and 0.7 psi (4.8 kPa) relative to external pressure while in intravehicular mode (i.e., inside the pressurized spacecraft).
ZERON 100 plate is included in the ASTM A240 specification. Its minimum room temperature mechanical property requirements are 109,000 psi [751 MPa] (ultimate tensile strength), 80,000 psi [552 MPa] (0.2% offset yield strength) and 25% minimum elongation. Zeron 100 has a copper addition which provides good resistance to sulfuric acid. For this ...
285 MPa 41,300 psi Yield strength (0.2% offset) 285 MPa 41,300 psi Impact strength 58.0 J 42.8 ft-lbf Elongation at fracture 14% Shear strength 214 MPa 31,000 psi Compressive yield strength 414 MPa 60,000 psi Fatigue strength (reverse bending 5x10 8 cycles) 47.0 MPa 6,820 psi Hardness 80 Brinell Physical properties
A discontinuity may exist as a single feature (e.g. fault, isolated joint or fracture) and in some circumstances, a discontinuity is treated as a single discontinuity although it belongs to a discontinuity set, in particular if the spacing is very wide compared to the size of the engineering application or to the size of the geotechnical unit.