Analysis of nonlinear wave propagation and shock wave formation in quasi-brittle material

M. Saka; S. Ohba; N. Aizawa; H. Abe

Analysis of nonlinear wave propagation and shock wave formation in quasi-brittle material

M. Saka, S. Ohba, N. Aizawa, H. Abe

ENG - Finemechanics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Fracture of quasi-brittle materials such as concrete and rocks is known to result from the formation and development of microcracks. Microcracks reduce the macroscopic value of Young's modulus and therefore the corresponding wave velocity, so that shock wave formation is expected. The phenomenon was studied for granite as an example of quasi-brittle materials. By using a constitutive law based on experiment, nonlinear wave propagation was analyzed numerically for an infinite plate. The plate is subjected to an impact compressive stress at one of its surfaces. The other surface of the plate is assumed to be stress free. It was shown that the shape of the incident wave has a significant effect on the forming shock wave. -Authors

Original language	English
Pages (from-to)	421-427
Number of pages	7
Journal	JSME International Journal, Series A: Mechanics & Material Engineering
Volume	37
Issue number	4
Publication status	Published - 1994 Dec 1

ASJC Scopus subject areas

Engineering(all)

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AU - Saka, M.

AU - Ohba, S.

AU - Aizawa, N.

AU - Abe, H.

PY - 1994/12/1

Y1 - 1994/12/1

N2 - Fracture of quasi-brittle materials such as concrete and rocks is known to result from the formation and development of microcracks. Microcracks reduce the macroscopic value of Young's modulus and therefore the corresponding wave velocity, so that shock wave formation is expected. The phenomenon was studied for granite as an example of quasi-brittle materials. By using a constitutive law based on experiment, nonlinear wave propagation was analyzed numerically for an infinite plate. The plate is subjected to an impact compressive stress at one of its surfaces. The other surface of the plate is assumed to be stress free. It was shown that the shape of the incident wave has a significant effect on the forming shock wave. -Authors

AB - Fracture of quasi-brittle materials such as concrete and rocks is known to result from the formation and development of microcracks. Microcracks reduce the macroscopic value of Young's modulus and therefore the corresponding wave velocity, so that shock wave formation is expected. The phenomenon was studied for granite as an example of quasi-brittle materials. By using a constitutive law based on experiment, nonlinear wave propagation was analyzed numerically for an infinite plate. The plate is subjected to an impact compressive stress at one of its surfaces. The other surface of the plate is assumed to be stress free. It was shown that the shape of the incident wave has a significant effect on the forming shock wave. -Authors

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