Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 66 for “"Impact Resistance"”.
-
Impact resistance of filled concrete box sections
… is to analyze the effects of drop-weight impact tests on filled concrete box sections. Research in other areas of soil filled container walls has proved favorable in blast loading environments suggesting a concrete system may also work well. In the experiment, thirty different box sections …
-
Impact resistance of graphite/epoxy sandwich panels
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
-
Cyclic and Impact Resistance of FRP Repaired Poles
… from the substrate. This thesis investigates the resistance of repaired full-scale metallic poles retrieved from the field for monotonic, cyclic, and impact loading. These poles, which have rounded and multi-sided cross sections with and without access ports, were dented in the field or dented …
-
Impact resistance of high strength fiber reinforced concrete
… of fiber reinforced concrete under compressive impact has not previously been investigated. In the present research, the response of fiber reinforced concrete was investigated over the full strain rate regime, from static loading to high strain rate loading, and finally to impact loading. The …
-
Ballistic impact resistance of fiber-reinforced high density polyethylene
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1980.
-
Impact resistance and damage tolerance of composite sandwich panels
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
-
Impact Resistance of Hybrid Metal-Organic Frameworks/Carbon Fibers Composites
… In this study, the energy absorption due to impact at low speed will be tested and simulated in four configurations of CFRPs utilizing the same [0/90]<sub>S</sub> layout throughout them.</p> <p>The carbon fiber configurations used during this study are de-sized, acid-activated, metal-organic …
-
Effect of crosslinking on aramid composites and ballistic impact resistance
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1986.
-
Using 3D Printing to Improve the Impact Resistance of Sandwich Panels
… can limit their performance in strength and impact resistance. Advances in 3D printing have created the potential to use new materials and create new geometries for sandwich panel cores to improve their impact resistance. A uniform-density honeycomb core made from ULTEM-1010 was designed. It …
-
Impact resistance of foamed concrete slab and its modifications subjected to hemispherical impactor
… ratio of slab specimens. The experiment of impact was conducted by using falling-weight impact tower method to get the depth of penetration data. The depth of crater as product of impact is called penetration depth. The basic properties of materials were used to run the numerical simulation …
-
The behaviour of steel fibre reinforced concrete material and its effect on impact resistance of slabs
… long term and dynamic as a short term loads. The impact resistance of plain concrete is low and that’s mainly due to a fairly low energy dissipating features and inadequate tensile strength. To compensate for the weak tensile properties of the concrete the reinforced concrete is used and it has a …
-
Analytical and experimental study of the effect of cutting tool microgeometry on the impact resistance of milling tools
… of a milling tool cutting insert to resist the impacts that occur during the milling process, with respect to the cutting edge microgeometry. The first part of this thesis contains a mathematical model that was used to predict the cutting forces acting on the tool during milling, accounting for …
-
Ballistic Impact Resistance of Graphite Epoxy Composites With Shape Memory Alloy and Extended Chain Polyethylene Spectra™ Hybrid Components
… lack effective mechanisms for absorbing local impact energy often resulting in penetration and a structural strength reduction. The effect of adding small amounts of two types of high strain hybrid components on the impact resistance of graphite epoxy composites subjected to projectiles …
-
The effect of stringer design and leading-edge design on the strength characteristics of wooden pallets
Impact shear and static flexure tests were performed on pallet stringers notched with six different fillet radii. These notches were cut with a band-saw or a stringer-notcher. Attempts were made to reduce the incidence of stringer fracture between the notches (a) by nail-reinforcing the stringers …
-
Behavior of Reinforced Concrete Panels Subject to Impact by Non-deformable Projectiles
<p>In impact resistance of reinforced concrete (RC) panels against projectiles the contribution of the orthogonal mesh reinforcement has been ignored. In this study the contribution of mesh reinforcement to impact resistance and itseffect on the nature of local damage caused by impact of …
-
Investigation of cork as filler for fiber-reinforced composite material in kayaks
… bending test (ASTM D79o) and a Charpy impact test (ASTM D611o) to investigate maximum flexural stress, effective elastic modulus, and impact resistance. Fiberglass-epoxy samples serve as the control for comparing the results of the cork composite samples. The average flexural strength …
-
Impact response of interleaved composite materials
The need for better impact resistant composites has resulted in the development of many toughened resin systems. A combination of a tougher resin system along with higher strength fibers increases the impact resistance of the composite. The use of an adhesive layer between two plies of the improved …
-
Additive Manufacturing of Functional Materials for Biomedical Devices
… medical devices, including bespoke ankle braces, impact resistance protective paddings, and biomedical surfaces for the regulation of cell growth. Anisotropic, self-assembling, and self-reinforcement hierarchical liquid crystal polymer (LCP) are 3D printed with the form of fibres into macroscopic …
-
Flammability and durability of bamboo fabric reinforced polypropylene composites and their hybrids
… and can also contribute substantially to fire resistance in composites. In this study, bamboo fabric has been used to reinforce polypropylene (PP) to produce eco-friendly composites. Hybridisation is a technique which may improve the strength and stiffness as well as the moisture resistance and …
-
Resistance of Carbon Fibre Reinforced Composites to Quasi-static and Ballistic Perforation
… as well as the indentation and penetration resistance, of carbon fibre reinforced plastic (CFRP) cross-ply laminates were investigated under quasi-static and ballistic loading. In this thesis, the two most prominent failure modes were indirect tension and shear plugging. To characterise the …
Page 1 of 4