3 research outputs found
Effect of the static strength of a metal on long-rod penetration at low velocities
The effect of the static strength (yield stress) of a material on major penetration parameters (specific work of deformation and penetration force determined by the pressure at the rod-cavity contact surface) was examined. The analytical equations and quantitative estimates of specific work spent for formation of spherical and cylindrical cavities and of the pressure at the surface of such cavities at their static expansion were obtained for the rigidplastic and elastoplastic models of the material. The estimates of specific work of deformation at the formation of the spherical cavity in the plate and of the penetration of a rigid rod are shown to be adequate. The influence of strain hardening on a maximum radial stress on the cavity surface was evaluated. The resistance to penetration and the expansion of a cavity are shown to be strongly influenced by the elastic compressibility of a material in the inelastic region at low penetration velocities. The kinetics of the stress-strain state of the material at the formation of the cavity was analyzed for the case of considerable deformation of a rod at penetration.Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΏΡΠΎΡΠ½ΠΎΡΡΠΈ (ΠΏΡΠ΅Π΄Π΅Π»Π° ΡΠ΅ΠΊΡΡΠ΅ΡΡΠΈ) ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° Π½Π° ΠΎΡΠ½ΠΎΠ²Π½ΡΠ΅ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ ΠΏΡΠΎΡΠ΅ΡΡΠ° ΠΏΡΠΎΠ½ΠΈΠΊΠ°Π½ΠΈΡ - ΡΠ΄Π΅Π»ΡΠ½ΡΡ ΡΠ°Π±ΠΎΡΡ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΡ ΠΊΠ°Π²Π΅ΡΠ½Ρ ΠΈ Π΄Π°Π²Π»Π΅Π½ΠΈΠ΅ Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΊΠΎΠ½ΡΠ°ΠΊΡΠ°. ΠΠΎΠ»ΡΡΠ΅Π½Ρ Π°Π½Π°Π»ΠΈΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π²ΡΡΠ°ΠΆΠ΅Π½ΠΈΡ ΠΈ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π΅Π½Π½ΡΠ΅ ΠΎΡΠ΅Π½ΠΊΠΈ ΡΠ΄Π΅Π»ΡΠ½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ, Π·Π°ΡΡΠ°ΡΠ΅Π½Π½ΠΎΠΉ Π½Π° ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠ΅ ΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΊΠ°Π²Π΅ΡΠ½, ΠΈ Π΄Π°Π²Π»Π΅Π½ΠΈΡ Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΡΠ°ΠΊΠΈΡ
ΠΊΠ°Π²Π΅ΡΠ½ ΠΏΡΠΈ ΠΈΡ
ΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠΈ Π΄Π»Ρ ΠΆΠ΅ΡΡΠΊΠΎΠΏΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΈ ΡΠΏΡΡΠ³ΠΎΠΏΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°. ΠΠΎΠΊΠ°Π·Π°Π½Π° Π°Π΄Π΅ΠΊΠ²Π°ΡΠ½ΠΎΡΡΡ ΠΎΡΠ΅Π½ΠΎΠΊ ΡΠ΄Π΅Π»ΡΠ½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ Π΄Π΅ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΠ»Π°ΡΡΠΈΠ½Ρ ΠΏΡΠΈ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠΈ ΡΡΠ΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΊΠ°Π²Π΅ΡΠ½Ρ ΠΈ ΠΏΡΠΈ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°Π½ΠΈΠΈ ΠΊΠ°Π²Π΅ΡΠ½Ρ Π² ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ ΠΏΡΠΎΠ½ΠΈΠΊΠ°Π½ΠΈΡ ΠΆΠ΅ΡΡΠΊΠΎΠ³ΠΎ ΡΡΠ΅ΡΠΆΠ½Ρ. ΠΡΠ΅Π½Π΅Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΡΠΏΡΠΎΡΠ½Π΅Π½ΠΈΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° Π½Π° ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ΅ ΡΠ°Π΄ΠΈΠ°Π»ΡΠ½ΠΎΠ΅ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΠ΅ Π½Π° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠΈ ΠΊΠ°Π²Π΅ΡΠ½Ρ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΠΏΡΠΈ Π½ΠΈΠ·ΠΊΠΈΡ
ΡΠΊΠΎΡΠΎΡΡΡΡ
ΠΏΡΠΎΠ½ΠΈΠΊΠ°Π½ΠΈΡ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠ΅ Π²Π»ΠΈΡΠ½ΠΈΠ΅ Π½Π° ΡΠΎΠΏΡΠΎΡΠΈΠ²Π»Π΅Π½ΠΈΠ΅ ΠΏΡΠΎΠ½ΠΈΠΊΠ°Π½ΠΈΡ ΠΈ ΡΠ°ΡΡΠΈΡΠ΅Π½ΠΈΠ΅ ΠΊΠ°Π²Π΅ΡΠ½Ρ ΠΎΠΊΠ°Π·ΡΠ²Π°Π΅Ρ ΡΠΏΡΡΠ³Π°Ρ ΡΠΆΠΈΠΌΠ°Π΅ΠΌΠΎΡΡΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° Π² ΠΎΠ±Π»Π°ΡΡΠΈ Π½Π΅ΡΠΏΡΡΠ³ΠΈΡ
Π΄Π΅ΡΠΎΡΠΌΠ°ΡΠΈΠΉ. ΠΡΠΎΠ²Π΅Π΄Π΅Π½ Π°Π½Π°Π»ΠΈΠ· ΠΊΠΈΠ½Π΅ΡΠΈΠΊΠΈ Π½Π°ΠΏΡΡΠΆΠ΅Π½Π½ΠΎ-Π΄Π΅ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° ΠΏΡΠΈ ΠΏΡΠΎΠ½ΠΈΠΊΠ°Π½ΠΈΠΈ Π΄Π΅ΡΠΎΡΠΌΠΈΡΡΠ΅ΠΌΠΎΠ³ΠΎ ΡΡΠ΅ΡΠΆΠ½Ρ