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NACA-TN-868
The influence of impact velocity on the tensile characteristics of some aircraft metals and alloys
Year: 1942
Abstract: This report deals principally with the results of tension tests on sixteen metals and alloys, most of which are employed extensively in aircraft construction. The tension characteristics are discussed for static conditions and rates of deformation up to about 150 feet per second.
The equipment and procedure employed in these tests are described. Velocities are obtained by means of a heavy rotating disk. The forces acting during impact are determined by means of a strain-sensitive resistance dynamometer and are recorded with a cathode-ray oscillograph. The effective constant velocity of the rotating disk permits the development of stress-strain diagram.
As a result of these tests, it has been shown that Dowmetal M and 18-percent chromium – 8-percent nickel stainless steel are adversely affected by an increasing rate of deformation. The other materials tested exhibit changes of yield stress, ultimate strength, and other tensile properties.
An investigation of the effect of decreasing the gage length of specimens below 1 inch is reported. The ratio of gago length to diameter is reduced to unity.
The equipment and procedure employed in these tests are described. Velocities are obtained by means of a heavy rotating disk. The forces acting during impact are determined by means of a strain-sensitive resistance dynamometer and are recorded with a cathode-ray oscillograph. The effective constant velocity of the rotating disk permits the development of stress-strain diagram.
As a result of these tests, it has been shown that Dowmetal M and 18-percent chromium – 8-percent nickel stainless steel are adversely affected by an increasing rate of deformation. The other materials tested exhibit changes of yield stress, ultimate strength, and other tensile properties.
An investigation of the effect of decreasing the gage length of specimens below 1 inch is reported. The ratio of gago length to diameter is reduced to unity.
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:38:38Z | |
| date available | 2017-09-04T16:38:38Z | |
| date copyright | 15615 | |
| date issued | 1942 | |
| identifier other | VIYHUEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/102241 | |
| description abstract | This report deals principally with the results of tension tests on sixteen metals and alloys, most of which are employed extensively in aircraft construction. The tension characteristics are discussed for static conditions and rates of deformation up to about 150 feet per second. The equipment and procedure employed in these tests are described. Velocities are obtained by means of a heavy rotating disk. The forces acting during impact are determined by means of a strain-sensitive resistance dynamometer and are recorded with a cathode-ray oscillograph. The effective constant velocity of the rotating disk permits the development of stress-strain diagram. As a result of these tests, it has been shown that Dowmetal M and 18-percent chromium – 8-percent nickel stainless steel are adversely affected by an increasing rate of deformation. The other materials tested exhibit changes of yield stress, ultimate strength, and other tensile properties. An investigation of the effect of decreasing the gage length of specimens below 1 inch is reported. The ratio of gago length to diameter is reduced to unity. | |
| language | English | |
| title | NACA-TN-868 | num |
| title | The influence of impact velocity on the tensile characteristics of some aircraft metals and alloys | en |
| type | standard | |
| page | 63 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1942 | |
| contenttype | fulltext |