Download e-book for kindle: High-Speed Penetration Dynamics: Engineering Models and by Gabi Ben-Dor
By Gabi Ben-Dor
This crucial monograph is the 1st accomplished compendium of engineering types utilized in high-speed penetration mechanics.
The booklet involves components. the 1st half (more than 1 / 4 of the book's content material) is actually a instruction manual giving a truly exact precis of the engineering versions used for the research of high-speed penetration of inflexible projectiles into a number of media (concrete, metals, geological media). the second one a part of the publication demonstrates the chances and potency of utilizing approximate versions for investigating conventional and nontraditional difficulties of penetration mechanics.
varied chapters within the books are dedicated to diverse sessions of difficulties and will be learn independently. every one bankruptcy is self-contained, which incorporates a accomplished literature survey of the subject, and consists of a listing of used notations. The bibliography comprises greater than seven hundred references.
This monograph is a competent and quintessential reference consultant for someone drawn to utilizing engineering types in high-speed penetration mechanics.
Readership: pros, teachers, researchers and graduate scholars in engineering mechanics, mechanical engineering, fabrics technology, civil engineering and ocean engineering.
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Additional info for High-Speed Penetration Dynamics: Engineering Models and Methods
2), where A0 and A2 are determined by Eqs. 17) while the formula for A1 reads: L x ( x fr ) A1 a1 r 2 2 dx . 3) The averaged resistance force acting at the flat part of the nose of a projectile, D flat , is as follows: D flat B2 v 2 B1v B0 , Bi r 2 ai , i 0,1,2 . 4) In the case of truncated ogive-shaped impactors, integral in Eq. 6) 6 K CRH r is determined by Eq. 33) and inequalities in Eq. 32) are satisfied. 7) Eq. 6) yields: 4 K CRH 1 2 K CRH . 9) where v K ( v , g 0 , g1 , g 2 ) g 0 2 d 2 g1 g 0 .
Three stages of penetration into a shield having a finite thickness. The case L b. a) L b x b) L b x (h) x L x (h) L x (h) x (h) 0 L b Lb h 0 b L Lb h Fig. 5. Penetration into a shield having a finite thickness. Description of the area of the impactor-shield interaction. 1 Drag force. Equation of motion Using the adopted system of coordinates and notations allows us to derive an expression for the drag force. 2) Eq. 3) 0 where nose is the nose area of the impactor, nose 2 1 2 (0, )d .
17) ON fr 0 Eq. 10) Eq. 35), Eq. 36) fr 0 Eq. 35), Eq. 39) Eq. 19) Eq. 20) fr 0 Eq. 12) Eq. 20) fr 0 Eq. 19) Eq. 35), Eq. 1. Characteristics vbl and v res for a finite width shield and H for a semi-infinite shield are calculated in all cases using Eqs. 22), correspondingly. Blank in the column “Friction” indicates that the model is presented for a general case, fr 0 . 7 Averaged Three-Term Model Let us consider an averaged three-term model without friction, n (u, v ) a2u 2 v 2 a1uv a0 , fr 0 .
High-Speed Penetration Dynamics: Engineering Models and Methods by Gabi Ben-Dor