1. Strain-rate and strain-rate-history effects in several metals in torsion
- Author
-
Theodore Nicholas
- Subjects
Materials science ,Mechanical Engineering ,Metallurgy ,technology, industry, and agriculture ,Aerospace Engineering ,chemistry.chemical_element ,Torsion (mechanics) ,Flow stress ,Strain rate ,chemistry ,Mechanics of Materials ,Aluminium ,Dynamic loading ,Solid mechanics ,Titanium - Abstract
A machine for testing thin-walled tubes in torsion at shear-strain rates up to 25/sec is described. Results of constant and variable-strain-rate tests are presented for 1100-0 aluminum, AISI 1020 steel, and 50-A titanium. Results indicate that 1100-0 aluminum is very slightly strain-rate sensitive, but steel and titanium are noticeably sensitive to both strain rate and strain-rate history. Variable-rate tests show that subsequent dynamic loading on a statically prestrained specimen causes an increase in the flow stress in steel and a decrease in the flow stress in titanium.
- Published
- 1971