著者

浅田 和雄 高橋 浩昭 高橋 尚志

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.41, no.468, pp.1396-1402, 1992-09-15 (Released:2009-06-03)

参考文献数

7

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When a projectile with high velocity impacts onto a target, several fracture modes (such as spall fracture, plug fracture, penetration fracture and so forth) appear in the target. Therefore, in order to identify an impact fracture strength of materials, a particular type of impact experiments should be undertaken. For example, an impact experiment for flying plate is suitable to determine the spall fracture strength. Different impact conditions, however, may bring in different fracture strength even for the same target material. For the purpose of clarifying perforation dynamics (mechanism) by means of computer code, it is necessary to provide a unified fracture condition which enables to explain all modes of spall fracture, plug fracture and penetration fracture. Under this fracture condition, fracture takes place when the strain has attained its critical value, which may be affected by pressure and temperature.In the present study, the unified fracture condition was examined through comparison between the back surface velocity of flying plate impact experiment and the velocity calculated from computer code by using Ni-Cr-Mo steel (SNCM-630 steel). The computer code used here was that of one-dimensional large deformation stress wave propagation by finite-difference-method. The experimental results and computer code results were well in accord with each other, confirming the applicability of the unified fracture condition to perforation dynamics.

著者

高橋 尚志 黒部 明 浅田 和雄

出版者

一般社団法人 日本高圧力技術協会

雑誌

圧力技術 (ISSN:03870154)

巻号頁・発行日

vol.30, no.4, pp.190-199, 1992-07-25 (Released:2010-08-05)

参考文献数

10

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This paper describes an outline of computer simulation techniques for material failuers under a High Velocity Impact Phenomena.Basic equations are solved by finite difference method and material models are taken into onsideration of strain rate effect, thermal softning effect, Tillotson's state equation for thermodynanic effect and espcially Mescall's failure criteria.We are justified for this techniques that are very effective, becase we compared calculation results with experimental ones and confirmed that both are good fitable.

著者

浅田 和雄 高橋 浩昭 高橋 尚志

出版者

社団法人日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.41, no.468, pp.1396-1402, 1992-09-15

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When a projectile with high velocity impacts onto a target, several fracture modes (such as spall fracture, plug fracture, penetration fracture and so forth) appear in the target. Therefore, in order to identify an impact fracture strength of materials, a particular type of impact experiments should be undertaken. For example, an impact experiment for flying plate is suitable to determine the spall fracture strength. Different impact conditions, however, may bring in different fracture strength even for the same target material. For the purpose of clarifying perforation dynamics (mechanism) by means of computer code, it is necessary to provide a unified fracture condition which enables to explain all modes of spall fracture, plug fracture and penetration fracture. Under this fracture condition, fracture takes place when the strain has attained its critical value, which may be affected by pressure and temperature. In the present study, the unified fracture condition was examined through comparison between the back surface velocity of flying plate impact experiment and the velocity calculated from computer code by using Ni-Cr-Mo steel (SNCM-630 steel). The computer code used here was that of one -dimensional large deformation stress wave propagation by finite-difference-method. The experimental results and computer code results were well in accord with each other, confirming the applicability of the unified fracture condition to perforation dynamics.