USA flag logo/image

An Official Website of the United States Government

Meshfree Simulation of Adiabatic Shear Band and Spall Fracture for Materials…

Award Information

Agency:
Department of Defense
Branch:
Army
Award ID:
83239
Program Year/Program:
2008 / STTR
Agency Tracking Number:
A074-014-0109
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
NextGen Aeronautics
2780 Skypark Drive Suite 400 Torrance, CA -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2008
Title: Meshfree Simulation of Adiabatic Shear Band and Spall Fracture for Materials and Structures under Ballistic Impacts and Penetrations
Agency / Branch: DOD / ARMY
Contract: W911NF-08-C-0083
Award Amount: $739,553.00
 

Abstract:

In battlefield environments, ballistic impact may result in the failure of military structures and materials. In order to improve the reliability and safety of military structures and materials, it is important to study material failure under ballistic impact in the design stage. There are two main failure phenomena related to the material response due to a high-speed ballistic impact. One is adiabatic shear and the other is spall fracture. Simulations of these two phenomena are challenging due to the existence of large deflection and sharp discontinuity caused by shock waves and shear bands. In order to model these effects, a traditional finite element method requires insertion of discontinuous elements, very refined mesh, continuous mesh updating, and a priori knowledge of the spatial location of shear band to simulate these phenomena. A meshfree method alleviates these problems largely. Therefore, the proposed work is geared towards developing mathematically consistent and robust numerical algorithms that accurately capture adiabatic shear band and spall fracture in 2-D and 3-D structures using meshfree particle method. The developed software module will be easy to use and will be made to work in conjunction with existing commercial finite element software tools

Principal Investigator:

Akhilesh Jha
Principal Investigator
3106268374
ajha@nextgenaero.com

Business Contact:

Zoltan Feher
Manager, Contracts
3106268384
zfeher@nextgenaero.com
Small Business Information at Submission:

NEXTGEN AERONAUTICS
2780 Skypark Drive Suite 400 Torrance, CA 90505

EIN/Tax ID: 030404178
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
UNIV. OF IOWA
100 Gilmore Hall
Iowa City, IA 52242
Contact: Meredith Hay
Contact Phone: (319) 335-2119
RI Type: Nonprofit college or university