FIBER REINFORCED HIGH STRENGTH CONCRETE WITH CELLULAR STEEL SANDWICH COMPOSITE PANEL FOR BLAST AND IMPACT MITIGATION

... conventional reinforced concrete panels, steel fibre reinforced concrete panels, profiled steel sheeting reinforced concrete panels, steel- air -steel sandwich panels and steel -concrete- steel sandwich panels ... used as blast and impact protection panels or armour They include metal air sandwich panels or cellular metal panels, steel- concretesteel sandwich panels, fibre composite panels, steel stud composite ... FIBRE REINFORCED HIGH STRENGTH CONCRETE WITH CELLULAR STEEL SANDWICH COMPOSITE PANEL FOR BLAST AND IMPACT MITIGATION ABRAHAM CHRISTIAN (B.Eng.(Hons.), Diponegoro University) A THESIS SUBMITTED FOR...

guide for selecting proportions for high-strength concrete with portland cement and fly ash

... 318 allows concrete mixtures to be proportioned HIGH-STRENGTH CONCRETE WITH PORTLAND CEMENT AND FLY ASH setting, h) method of placement, and i) workability 211.4R-3 high-strength concretes are ... of the cement and fly ash In Tables 4.3.5(a) and (b), recommended maximum w/(c+p) are given as a function of maximum-size aggregate HIGH-STRENGTH CONCRETE WITH PORTLAND CEMENT AND FLY ASH 211.4R-7 ... Specification for Chemical Admixtures for Concrete C 618 Standard Specification for Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixture in Portland Cement Concrete C 917 Standard...

Fire resistance of ultra high strength concrete filled steel tubular columns

... the fire resistance of high strength tubular steel columns infilled with ultra- high strength concrete with compressive strength up to 160MPa Although research work has been done on concrete filled ... effects of strengths of steel and concrete on the fire resistance time of CFST columns Analysis results showed that the fire resistance time of columns with UHSC was slightly higher than that of columns ... temperature of the steel was exceeded 2.6 Fire Resistance of Concrete Filled Steel Tubular Columns 2.6.1 Experimental Studies The experimental investigations on the fire resistance of concrete filled steel...

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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_1 pot

... are the turned, bored and milled dimensions Machinability and Surface Integrity ‘full’ production operational machining, meaning that with some degree of confidence, manufacturing dictates and ... in these doubtful situations, rather than ‘working blindly’ – with no relevant cutting data, to base the applied cutting conditions upon Several of these ‘ranking’ non -machining tests can be employed, ... useful in actual industrial machining applications, where a more representative machinability situation was demanded Just some of these testpieces, along with a discussion of their relative merits,...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_2 docx

... present in a data set into ‘components’ Each ‘component’ is attributed to an identifiable cause, or source of variation; in addition, one ‘component’ represents the variation due to uncontrolled ... meaningful machinability assessment 7.2 Machined Roundness Roundness is a condition of a surface of revolution’ , which can take the form of a: cylinder, cone, or sphere, where all the peripheral data ... speed was raised by >2.5 times the optimum of 200 m min–1, with all facing operations being conducted at a ‘constant surface speed’12 of 550 m min–1 Typical tool-life curves produce by the AWT technique...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_4 pot

... magnitude of the output of a system with respect to that of the input – the conditions of operation and measurements must be specified’ (Smith, 1993, et al.) of increasing the frictional contact ... tooling with the greatest possible diameter with the minimum of tool overhang By way of a caution concerning chatter frequency, this normally occurs near the most flexible vibrational mode of the machining ... shape and its corresponding ‘Y’ direction The orientation of the modulation direction ‘Y’ toward a dynamically more-rigid direction angle, allows a decrease in vibrational response, giving greater...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_5 pdf

... 160. Surface texture comprises of: ‘long-’, ‘medium-’ and ‘short-components’, together with the ‘direction of the dominant pattern’ – superimposed upon each other [Courtesy of Taylor Hobson] Machinability ... rotational speed (Vr) oscillation speed (Vo), the length and position of the honing stroke, the honing stick pressure (Vc) The inclination angle of the cross-honing action, is a product of the ... typical production processes However, some caution should be taken when utilising these values for control of the surface condition, because they can misrepresent the actual state of the surface topography,...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_7 ppt

... NB This rate of heat generation only exists within the primary and secondary deformation zones By way of example of how the temperature generation/distribution occurs in orthogonal cutting, ... ‘regression line’ being the equivalent of the ‘least squares line’ , allows data on each axes to be compared – with some degree of confidence.(Wild, et al.,1995) Machinability and Surface Integrity ...  If by changing the range of the ‘beta-function’ equation above, from: 0→1 to Rp + Rv, or indeed with that of Rt, then substituting σ (i.e the standard deviation of the distribution) with Rq,...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_8 doc

... deformation – occurs when high pressures (i.e compression) are exerted on the cutting edge in combination with elevated temperatures Conditions likely to create plastic deformation on the cutting ... only the surface is ‘skimmed’ by a longitudinal turning operation • Notch wear on insert’s trailing edge – occurs by in the main, by adhesion wear, but to a lesser extent, may be the result of ... the initiation of a cut, the variations in the magnitude of the cutting force and its direction, may not be too great for both the toughness and strength of the cutting insert With continual usage...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_9 docx

... in conjunction with the application of efficient cutting conditions The following simple formula can be utilised to calculate the ROI for a particular: production operation; machine tool; machining ... and Surface Integrity as a result, offer extremely fast process response, in comparison to those of the of the ‘non-rigid type’ – having long measurement paths (i.e found in conventional strain-gauged ... disk’s surfaces, these being suitably ‘hard-wired’ to their appropriate and corresponding plug connectors As shear forces can only be transferred by frictional contact, a certain minimum of friction...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_10 ppt

... component, FC = cutting force component, FN = normal force component on the shear plane, FS = shear force component on shear plane, R = resultant tool force component, N = normal force component ... ‘frictional laws’ with the observation that: ‘The coefficient of friction* is substantially independent of the speed of sliding.’ *Coefficient of friction (µ) = F/N Thus, the friction force is ... tips of these ‘welded junctions’ Hence, the total frictional force ‘Ff’ is given by: Ff = τf Ar (ii) Where: τf = Shear strength of softer contacting material, Ar = Real contact area From equations...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_11 pot

... taper-section overcomes the limitation of perpendicular sectioning By taking an Machinability and Surface Integrity 363 Figure 186. The effects of residual stress and deformations of a workpiece by machining ... component The concept of the overall functional performance of a surface and its accompanying sub -surface condition was recognised by Field and Kahles (1971), where they used the term Surface Integrity ... 7.10 Surface Integrity of Machined Components – Introduction fects when discussing the machined surface condition in the following section Previously in Section 7.5 concerning machined surface...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_12 pptx

... ‘white-layer’ region extends to quite a small depth beneath the surface, in the region of 10 to 100 µm, depending upon the severity of the ‘abusive regime’ of surface generation Considering Fig 191 once again, ... of tensile residual stress was apparent in the immediate surface region Here, directly under this tensile stress zone, the stress concentration changed to one of compression (i.e to a depth of ... Machinability and Surface Integrity Figure 189. The influence of the cutting edge’s condition on the resultant machined surface integrity 369 370 Chapter In Fig...

Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_13 doc

... Soc of Metals (Ohio), 1975 Preliminary Study of Variations in Machinability of Carbon Steel PERA Pub No 179, April 1968 Kaczmarek, J Principles of Machining by Cutting, Abrasion and Erosion Peter ... Properties of Engineering Materials Hodder and Stoughton Educ., 1979 Influence of Metallurgy on Hole Making Operations American Soc of Metals (Ohio), 1978 Influence of Metallurgy on Machinability ... Whitehouse, D.J Conditioning of the Manufacturing Process using Surface Finish Proc of Lamdamap III, Computational Mechanics, 3–20, 1997 Whitehouse, D.J Surface Measurement Fidelity Proc of Lamdamap...

Report on High-Strength Concrete doc

... quality control, concrete properties, structural design, economic considerations, and applications Keywords: concrete properties; economic considerations; high-strength concrete; material selection; ... polymer-impregnated concrete, epoxy concrete, ultra-high-performance concrete; concrete with artificial, normal, and heavyweight aggregates; and reactive powder concrete In addition to focusing on concretes ... Printing March 2010 ® American Concrete Institute Advancing concrete knowledge Report on High-Strength Concrete Copyright by the American Concrete Institute, Farmington Hills, MI All rights reserved...

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