Hiển thị các bài đăng có nhãn bars. Hiển thị tất cả bài đăng
Hiển thị các bài đăng có nhãn bars. Hiển thị tất cả bài đăng

Thứ Tư, 11 tháng 3, 2015

Constitutive Relations under Impact Loadings

Constitutive Relations under Impact Loadings



The book describes behavior of materials (ductile, brittle and composites) under impact loadings and high strain rates. The three aspects: experimental, theoretical and numerical are in the focus of interest. Hopkinson bars are mainly used as experimental devices to describe dynamic behavior of materials. The precise description of experimental techniques and interpretation of wave interaction are carefully discussed. Theoretical background refers to rate dependent thermo viscoplastic formulation. This includes the discussion of well posedness of initial boundary value problems and the solution of the system of governing equations using numerical methods. Explicit time integration is used in computations to solve dynamic problems. In addition, many applications in aeronautic and automotive industries are exposed.




Thứ Ba, 20 tháng 1, 2015

Straw Men

Straw Men



Convicted of a vicious attack that left a rookie policewoman near death and unable to remember her past, new DNA evidence frees the madman known as the Scarecrow from prison. Teresa Harnett must face the possibility that her flawed memory put the wrong man behind bars. But then the phone calls begin — and the crackly voice of the Scarecrow reawakens her terror. Only psychologist Jim Christensen can pull the truth from her shattered mind.