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 77 for “"Impact Loading"”.
-
Bond between reinforcing bars and concrete under impact loading
… bond between reinforcing bars and concrete under impact loading was studied for plain, polypropylene fibre reinforced, and steel fibre reinforced concretes. The experimental program included setting up an impact test system, in which an impact load with considerable energy could be generated, and …
-
Impact loading and functional tissue engineering of articular cartilage
… to a single, non-surface disrupting 1.1 J (Low) impact experiences sufficient degeneration over 4 weeks to become functionally equivalent to tissue subjected to a single, surface disrupting 2.8 J (High) impact. By 24 hrs post High impact, cell death and sulfated glycosaminoglycan (sGAG) release …
-
The effects of impact loading on reinforced concrete panels
An investigation into the effects of impact loading on reinforced concrete panels (slabs) was conducted. The impact load was generated by means of a compound pendulum. The impact load was increased by increasing the height from which the pendulum was released as well as by the addition of weights …
-
Dynamic response of graphite/epoxy plates subjected to impact loading
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
-
Study of a simplified bumper system subjected to offset impact loading
… of the bumper system subjected a 40% offset impact loading condition.
-
The edge flaking of tungsten carbide hardmetal cermets under repetitive impact loading
Repetitive impact tests were carried out in order to determine the edge flaking performance of several grades of hardmetal cermets. In an attempt to understand the geometry and characteristics of the crack propagation glass was impacted. Various types of cracking are observed in the glass including …
-
Analysis of laminated architectural glazing subjected to combined wind and debris impact loading
… against combined wind and windborne debris impact. Here both small-hard (like roof gravel) and large-soft (like timber) windborne debris are considered. The stress response of the rectangular laminated architectural glazing was modeled using the finite element code ABAQUS. The effect of …
-
Three-dimensional, inelastic response of single-edge notch bend specimens subjected to impact loading
… structures that are subjected to short-duration loading caused by impact or blast. When the severity of impact loads is sufficient to produce large inelastic deformations, the assessment of crack-tip conditions must include the effects of plasticity, strain rate and inertia. This research …
-
Behaviour of FRP strengthened RC Beams with concrete patch repairs subjected to impact loading
… bars, lack of proper and timely maintenance, and loading and standards updating, among other reasons. Impact loading is an extreme form of loading that can damage RC structures such as bridges, interchanges and flyovers during their life span. The repair and strengthening of deteriorating RC …
-
Measurement and modeling of brain tissue and engineered polymer response to concentrated impact loading
… to reduce TBI include helmets designed to absorb impact energy, which are evaluated typically by simplified impact tests with engineered headforms equipped with brain tissue simulant materials and accelerometers.
-
Response of a nonlinear two-degree-of-freedom system subjected to an impact loading
… is exact only for a specific combination of impact parameters, but that for a wide range of parameters the solution describes the motion of the system adequately for design purposes. Finally, a few analytical solutions are compared with solutions obtained by numerical integration methods; and …
-
The performance assessment of patch repaired and CFRP strengthened RC T-beams under transverse impact loading
… in South Africa. Structural damage due to such loading conditions requires repair and strengthening procedures that can return the structure to its original load bearing capacity. The use of patch repair mortar is common practice for the repair of impact damaged bridge beams and the use of …
-
Improving Damage Tolerance of Composite Sandwich Structures Subjected to Low Velocity Impact Loading: Experimental and Numerical Analysis
… conventional composite facing skins exhibit low impact resistance in the transverse direction. Here, composite skin sandwich structures with three different impact resistant core materials were fabricated and tested both experimentally and numerically. Neat CFRP and 2024-T3 aluminum alloy sheets …
-
Shape Optimization of a Sandwich Composite Plate with Low-Velocity Impact Loading and Effect of Finite Difference Sensitivity Analysis
… and designed to withstand various pressure and loading conditions while also considering the safety and comfort of the astronauts. One of the critical load cases in spacesuit design is a low-velocity impact (LVI) which may occur due to tool drop and other similar scenarios. The objectives of …
-
An investigation into the characterisation of the spalling behaviour of Polycrystalline Diamond Compact(PDC) cutters under impact loading conditions
… The PDC cutters were loaded under specific impact conditions and their reactions monitored and characterised. In order to isolate and identify the mechanism responsible for the spalling of the PDC cutters required them to be tested for compression waves, reflected tensile waves, contact …
-
Progressive damage and failure of unidirectional fiber reinforced laminates under impact loading with composite properties derived from a micro-mechanics approach
… 16-ply unidirectional fiber reinforced laminates impacted at normal incidence by a rigid sphere. The damage is assumed to initiate when at least one of Hashin's failure criteria is satisfied with the evolving damage modeled by an exponential relation. Transient three dimensional impact problems …
-
Impact resistance of high strength fiber reinforced concrete
Concrete structures may be subjected to dynamic loading during their service life. Understanding the dynamic properties of concrete structures is becoming critical because of the increased concern about the dynamic loading of both civilian and military structures, and especially, the recent …
-
A Numerical Investigation of Loading Rate Effects on Pre-Cracked Charpy V-Notch Specimens
To quantify the effects of loading rate on ductile crack growth in CVN specimens, plane strain, finite element analyses are used to model ductile crack extension in specimens subjected to quasi-static and impact loading. The Gurson-Tvergaard dilatant plasticity model for voided materials describes …
-
Evaluation of the Mechanical Strength of Bund Walls under the Catastrophic Failure of Storage Tanks via Fluid Structure Interaction
… performance of bund wall structures under the impact loading caused by the collapse of storage tanks. Research on this subject has taken place at Liverpool John Moores University over two decades. Studies have included investigating the dynamic pressures exerted on the bund wall, the …
Page 1 of 4