2024-03-29T11:14:54Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00003701
2022-12-15T03:36:48Z
423:424:425
453:454
The Correlation between Hardness (Mean Contact Pressure ; by the Spherical Indenter) and the Flow Stress
球圧子の押込みによる硬さと変形抵抗との対応
球圧子の押込みによる硬さと変形抵抗との対応
石橋, 達弥
44778
下田, 茂
44779
Material Testing
Hardness
Mean Contact Pressure
Total Mean Strain of Indentation
Flow Stress
Hardness
Flow Stress Ratio
Stress-Strain Characteristic Curve
In order to correlate hardness P_m by the spherical indenter with the flow stress Y, it is necessary to determine the total mean strain of the indentation, which corresponds to the total strain in a uniaxial stress field. Firstly, the total mean strain of the indentation ε_<ic> is defined, by means of multiplying the total corresponding strain coefficient of the indentation C_<εc> by the total profile coefficient of the indentation (d/D_c) at the end of the plastic flow of a specimen ; ε_<ic>=C_<εc> (d/D_c). Then Hardness/Flow stress ratio C is obtained experimentally, C=9.8 P_m/Y, Y in MPa, and formulated as follows ; C=1.1+(2/3) ln (ε_<ic>・E_s/Y), E_s is the Young's modulus of a specimen. Further, an example of the flow stress-strain characteristic curve of SUS 304 specimen is shown in a wide range of the strain by means of a calculation using this formula and the former reported formula ; P_m=P_<up>(d/D_p)^<xp>, etc..
journal article
日本機械学会
1986-10
application/pdf
日本機械学会論文集. A編
482
52
2387
2394
日本機械学会論文集. A編
AN0018742X
03875008
https://niigata-u.repo.nii.ac.jp/record/3701/files/3_0005.pdf
jpn
日本機械学会