Normal Stress Calculation

Normaalijännityksen laskenta

The normal tension indicates the force per cross-sectional area of the structure. It determines whether the material can withstand the load without breaking or permanent deformation.

When a known force acts on a surface area, the magnitude of the stress is obtained by dividing the acting force by the surface area. The larger the surface area, the lower the stress. This is sufficient at first, and will be supplemented later as EP Calculation.

On these pages, I present the method of calculating according to the mathematics of ancient times, which for units of measurement differs from our current way of calculating. Millimetres are centimetres, making it easier to detect decimal errors in smaller units. Habit is a habit, so both ways are easy to form as your own way of calculating.

As a way of calculating the ratio, place yourself weighing 100 kg (1 KN) in the situation under consideration. You wonder what happens when you put yourself or even ten of yourself on top of a supporter. Is there any reason to suspect a mistake in the calculation in terms of the deflection. With my experience, I have seen errors of thought that have arisen as visual illusions produced by modern programmes. The design manager of a large engineering company said. "I can't count, but as I walk over the structure, I feel the firm adequacy of this structure."

Calculation as currently used

σ  = 20 000 N  / 200 mm² = 100 N / mm² = 100 MPa

Calculation by relationship calculation procedure

σ  = 20  kN  / 2 cm² = 10 kN / cm²

9.4.2026*10.33 (860 - 150)
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