Materials Research to Meet 21st Century Defense Needs Interim Report (2001) / Chapter Skim
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3. Research Priorities
3. Research Priorities
Pages 19-30
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From page 19... ...
Types of Materials Lightweight Materials with Retained or Enhanced Functionality A pervasive requirement for DOD systems is weight reduction in everything from tanks to the equipment camed by individual soldiers. At the same time, military forces will require at least the same fi~nctionality as today's force for example, the ability to withstand enemy fire.
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From page 20... ...
This presents an important area of research in several directions, ranging from multifunctional structural materials that incorporate a stealth capability to electronic and/or optical materials and devices that may actively respond to probes to achieve invisibility. Electronic and Photonic Materials for High-Speed Communications .
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From page 21... ...
, will require R&D on materials and systems that can increase energy efficiency. Materials for Improved Propulsion Technology Future forces hope to rely eventually on hypersonic propulsion systems.
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From page 22... ...
The need for multifunctionaTity is driven by the need to incorporate more functions into a fixed or shrinking volume. The concept of multifunctionality encompasses many classes of materials and applications, ranging from structural materials that may be self-interrogating, selfhealing, provide stealth, or protect against enemy fire, to microscopic materials or systems that may do some combination of sensing, moving, thinking, communicating, and acting.
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From page 23... ...
This is especially true for structural materials, which would make it possible to upgrade many components in a large system as technology advances without having to scrap the entire system. An example is the Navy's critical need for ship structures or coatings that reduce the necessity of paint chipping, an egregious task that adds significantly to the Navy's manpower requirements, recruiting levels, and retention levels.
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From page 24... ...
· . Design Issues materials-by-design materials tailorability materials influence on development and deployment costs availability of a commercial alternative risk management · manufacturing issues life-cycle issues Design Issues The successful introduction of a new material into a system requires that the design/selection of the materialist be integrated with the design of the entire system.
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From page 25... ...
The concept of treating multiple materials as a system as, for example, in structural composites, has already been shown to increase the tailorability of matenals properties substantially. The ability to tailor materials systems in multiple dimensions or at shorter length scales than has previously been possible also promises to open new doors.
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From page 26... ...
Risk Management For obvious reasons, DOD is highly risk averse, whenever possible. In the materials and process arena, risk aversion translates to a reluctance to introduce new matenals or processes unless the benefits have been clearly demonstrated and the risk has been shown to be acceptably low.
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From page 27... ...
A consistent theme in the list of system needs is the requirement for stronger, lighter, and stiffer materials that can meet increasingly stringent weight, mobility, and performance requirements. Other areas of need include higher temperature matenals for improved performance.
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From page 28... ...
A particularly important area of research will be the emerging issues of operations from greater distances, survivability, weight minimization, and environmental consciousness. Electronic and Photonic Materials Panel The emergence of the battlefield as a network of entities each of which is collecting, transmitting, and processing information in real-time will place stringent demands on electronic and/or optical materials that can function securely at the required bandwidth.
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From page 29... ...
These materials frequently offer weight advantages over their inorganic counterparts. If some functionalities, such as environmental responsivity or the capability of self-healing, could be introduced, these materials would be extremely attractive, as sensors, for example, or for dealing with chemical and biological agents.
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