Mechanical properties of materials for combined stresses based upon true stress and strain

✍ Scribed by Joseph Marin

• Publisher: Elsevier Science
• Year: 1957
• Tongue: English
• Weight: 702 KB
• Volume: 263
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(57)90586-0

✦ Synopsis

In this paper mechanical properties are first defined for simple tension based upon true stress and true strain.

An expression for the true toughness for simple tension is obtained in terms of the strain hardening exponent and the strength coefficient. Based upon an assumed true stress-strain relation in simple tension, expressions for yield strength, ultimate strength, ductility and toughness for combined states of stress are found.

In formulating the "true" mechanical properties for combined stresses, the simple deformation theory of plasticity is used for expressing the plastic combined stress-strain relations.

The use of true stress-strain properties is of importance in selecting materials since the conventional nominal properties may not indicate the correct selection.