Blast Mitigation Team (BMT)

baconossifiedMechanics

Oct 29, 2013 (3 years and 9 months ago)

103 views

Goals:


Develop inexpensive lightweight low
-
cost structures to safeguard civilian and defense
assets against blast loads (thermo
-
mechanical shocks, high energy directed threats).


Identify anticipated threats and devise techniques to mitigate them.


Learn socio
-
economic and other factors (e.g. upbringing, education, job opportunities)
that promote persons to engage in life
-
threatening events.


Educate and train personnel in identifying likely threatening events, evacuating people
quickly, safely, and providing emergency medical help and counseling.




Blast Mitigation Team (BMT)

High performance multiscale
mathematical and computational
modeling of high strain rate,
large strain, and elevated
temperature phenomena


Durability
-
based design


and lifetime assessment
of composite materials
and structures

Design, rapid manufacturing

and characterization of
structural composite systems

Polymer and composite

processing

R. C. Batra

S. W. Case

J. J. Lesko

S. W. Case

R. C. Moffitt

Current Project:

Analysis of Injuries in Persons Wearing Soft Body Armor due to
Impact Loads


Fig. from Roberts et al., JHU APL
Tech. Digest (2005)


Simulation of a
rojectile

impacting a soft
body armor (Batra et
al. (2007))


Model of soft body armor,

skin, ribs and soft tissue
behind ribs

Publication:

G. M. Zhang, R. C. Batra and J. Zheng, Effect of Frame Size, Frame Type, and Clamping Pressure on
the Ballistic Performance of Soft Body Armor,
Composites B (in press, available online).


Project recently completed:

Blast Resistant Light
-
Weight Laminated Composites



Objectives:

Develop a science based tool to
optimally design blast resistant marine composites.



Approach:

Use thermodynamically consistent material and geometric
nonlinear theory of internal variables to account for energy dissipated due to
different failure mechanisms, and determine optimum values of parameters.




Work Completed:

Have developed, verified and
validated a 3
-
D FE code to analyze transient finite
deformations of a laminated composite structure
subjected to explosive loads, and ascertained the
effect of material, geometric and damage
parameters on energy dissipated.



Relevance:

The developed mechanics based
tool will enable engineers design lightweight
blast resistant structures.

Validation

Publications:

Blast Resistance of Unidirectional Fiber Reinforced Composites
,
Composites B (in press; available on line)

Response of Fiber Reinforced Composites to Underwater
Explosive Loads
, Composites B, 38, 448
-
468, 2007.

Modeling Damage Development in Polymeric Composites
,
Composites B (in press, available on line)