http://www.ntis.gov/rss/RSSNTISCategoryList.aspxNational Technical Reports Libraryen(c) 2008, National Technical Information Service. All rights reserved.5http://www.ntis.gov/images/logoRSS.jpghttp://www.ntis.govNo abstract available. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571497Military structures are susceptible to high velocity impact due to both ballistic and blast loads. During a high velocity impact a shock wave much greater than static collapse resistance propagates through the material. Metallic structures usually un ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571924Improving the performance of aircraft and other military hardware is of prime concern to designers. The designers strive to build the military hardware which is light with improved performance and at the same time have low acquisition and life cycle ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571921Fourteen nickel-base superalloy single crystals containing 0 to 5 wt% chromium (Cr), 0 to 11 wt% cobalt (Co), 6 to 12 wt% molybdenum (Mo), 0 to 4 wt% rhenium (Re), and fixed amounts of aluminum (Al) and tantalum (Ta) were examined to determine the ef ...http://www.ntis.gov/search/product.aspx?ABBR=N20120017919Computational studies are performed using the recent Holmquist- Johnson glass model and the earlier Johnson-Holmquist brittle material model. Although the JH-2 model has been adapted to provide reasonably accurate predictions for soda-lime glass, the ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571731The Office of Chief Technologist (OCT), NASA has identified the need for research and technology development in part from NASA's Strategic Goal 3.3 of the NASA Strategic Plan to develop and demonstrate the critical technologies that will make NASA's ...http://www.ntis.gov/search/product.aspx?ABBR=N20130000618In this Current Intelligence Bulletin, NIOSH continues its long-standing history of using the best available scientific information to assess potential hazards and risks and to provide guidance for protecting workers. Since it is early in the develop ...http://www.ntis.gov/search/product.aspx?ABBR=PB2013107108Graphene oxide produced by chemical oxidation formed stable dispersions in LECy cyanate ester matrix and edge functionalized graphite does not. High shear mixing followed by sonication was the best method for graphene oxide dispersion in LECy. Additi ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571736The study of fractures of glass, glassy type materials, and plastic has long been of interest to the forensic community. The focus of this interest has been the use of glass and polymer fractures to reconstruct past events and to associate items of e ...http://www.ntis.gov/search/product.aspx?ABBR=PB2013106381A systematic approach was undertaken to enhance spike resistance of flexible body armor. A traditional STF composite is consisted of fumed silica particles (about 7 nm in diameter but highly agglomerated due to van der Waals forces), PEG, and Kevlar. ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571815Electronics that are capable of intimate, non-invasive integration with the soft, curvilinear surfaces of biological tissues offer important opportunities for diagnosing and treating disease and for improving brain/machine interfaces. This article de ...http://www.ntis.gov/search/product.aspx?ABBR=ADA572037The effects of manufacturing and in-service defects and damage are an important consideration in the design of aerospace structures. These effects need to be fully understood for designing, manufacturing, and subsequent maintenance of aerospace struc ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571922Ferromagnetic shape-memory alloy (FSMA) particles undergo changes in both electromagnetic properties and crystallographic structure when strained. When embedded in a structural material, these attributes can provide sensory output of the strain state ...http://www.ntis.gov/search/product.aspx?ABBR=N20120016524Non-oxide fiber optics such as heavy metal fluoride and chalcogenide glasses are extensively used in infrared transmitting applications such as communication systems, chemical sensors, and laser fiber guides for cutting, welding and medical surgery. ...http://www.ntis.gov/search/product.aspx?ABBR=N20120016709The ternary alloy AlN-GaN-InN system provides several distinct advantages for the development of UV detectors for future planetary missions. First, (InN), (GaN) and (AlN) have direct bandgaps 0.8, 3.4 and 6.2 eV, respectively, with corresponding wave ...http://www.ntis.gov/search/product.aspx?ABBR=N20120016988Plasmons describe collective oscillations of electrons. They have a fundamental role in the dynamic responses of electron systems and form the basis of research into optical metamaterials. Plasmons of two-dimensional massless electrons, as present in ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571876The capability of Shape Memory Alloys (SMAs) to generate a residual stress state in a new hybrid SMA-ceramic composite for extreme environments is explored here. By generating a compressive residual stress on the ceramic phase, the beneficial materia ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571487Previous research has demonstrated the efficacy of various commercial admixtures for rapid setting concrete in cold weather environments, but this research has mostly focused on gathering data on too large a time window (more than 7 days) and focuses ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571771Delaminations in composite laminates resulting from impact events may be accompanied by minimal indication of damage at the surface. As such, inspection techniques are required to ensure defects are within allowable limits. Conventional ultrasonic sc ...http://www.ntis.gov/search/product.aspx?ABBR=N20120016820This effort addressed ignition and combustion of aluminum particles in different environments. The focus was on identifying quantifiable characteristics of aluminum ignition and combustion that are useful for development and validation of the respect ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571672Chromite ((Mg, Fe++)(Cr, Al, Fe+++)2O4) is the only source for the metallic element chromium, which is used in the metallurgical, chemical, and refractory industries. Podiform chromite deposits are small magmatic chromite bodies formed in the ultrama ...http://www.ntis.gov/search/product.aspx?ABBR=PB2013106353Battle damage repair (BDR) can play a key role in the outcome of a war. Promptness, reliability, and effectiveness of repairs affect the availability of aircraft for combat. In an air combat, an efficient Aircraft Battle Damage Repair (ABDR) is a key ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571697In an update to previous research, we have been increasing the fiber- volume fraction by Vacuum Assisted Resin Transfer Molding (VARTM) in order to produce composite structures with aerospace grade qualities. Of specific focus is the control of proce ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571902Under MURI support, we are (1) demonstrating the formation of highly functional 3-D photonic crystals using interference lithography; the breakthrough tools are be gray-scale phase masks designed with genetic algorithms (GAs) and fabricated through s ...http://www.ntis.gov/search/product.aspx?ABBR=ADA572197This report documents four critical tasks concerned with the development and implementation of an advanced and novel modeling framework for predicting damage accumulation in composite structures undergoing monotonic and fatigue loadings. The critical ...http://www.ntis.gov/search/product.aspx?ABBR=ADA572212The metal finishing industry has been impacted by numerous regulatory actions related to the hazardous materials that are used in decorative and functional coating processes. These environmental regulations are applicable to both commercial and gover ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571800This report documents a preliminary experimental, analytical, and modeling effort for validating a numerical approach using constitutive material strength response with an appropriate yield surface model. The research is sub- divided into three areas ...http://www.ntis.gov/search/product.aspx?ABBR=ADA571613