Uniform expansion

In the tensile test, the uniform elongation is the plastic change in length related to the initial measurement length when the tensile specimen is loaded with the maximum force ; this is usually achieved with the tensile strength . The uniform elongation indicates that the tensile specimen does not constrict up to the maximum force , but rather stretches evenly. ${\displaystyle A_{\mathrm {g} }}$ ${\displaystyle L_{0}}$ ${\displaystyle L_{\mathrm {pm} }-L_{0}}$ ${\displaystyle F_{\mathrm {m} }}$ ${\displaystyle R_{\mathrm {m} }}$ ${\displaystyle A_{\mathrm {g} }}$

${\displaystyle A_{\mathrm {g} }={\frac {L_{\mathrm {pm} }-L_{0}}{L_{0}}}\cdot 100\,\%=\left({\frac {L_{\mathrm {pm} }}{L_{0}}}-1\right)\cdot 100\,\%}$

The tensile test for metallic materials is a  standardized material testing method according to DIN EN ISO 6892 .

See also

• Stress-strain diagram

References

1. ^ Bargel, Schulze: Material Science. Springer-Verlag Berlin Heidelberg 2000, 7th edition, ISBN 3-540-66855-1 , p. 94.