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 52 for “"Impact Force"”.
-
Impact force and moment problems on random fields with fractal and hurst effects
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
-
Forces and time delay due to impact with gates in ski racing
In an effort to better understand impacts with gates during ski racing competition, on-snow measurements and observations were made of both standard gates and inflatable gates. These observations highlighted the importance of impact force and time. Two additional experiments were done to analyze …
-
Detection of in-plane stress waves with Polyvinylidene Fluoride (PVDF) sensors
… of PVDF sensing related to determination of impact force, detection of stress wave propagation, and the stress averaging effect of PVDF sensors.</p><p>An experimental method was developed for calculating a proportionality constant between a PVDF sensor's voltage and the impact force, on a …
-
Exploration of Movement Variability and Limb Loading Asymmetry During Simulated Daily Functional Tasks
… and healthy population. Symmetry deficits can impact quality of life and in some cases have been associated with an increase in injury risk. Therefore, it is essential to understand movement and loading symmetry in healthy individuals to facilitate the identification of rehabilitation targets. …
-
Low velocity impact response of rc beam with artificial polyethylene aggregate as concrete block infill
… serviceability. A new lightweight composite reinforced concrete section was developed with a novel use of a lightweight concrete block as infill utilizing Artificial Polyethylene Aggregate (APEA and MAPEA). The concrete near the neutral axis acts as a stress transfer medium between the …
-
The Impact of Lower Limb Dominance on Side-to-Side Symmetry in Daily Living and Sports-related Tasks
… running and establish how the dominant limb can impact symmetry. By evaluating symmetry in healthy adults, how the limbs function with respect to one another can be determined. Therefore, the first purpose of this study was to investigate the impact of lower limb dominance on walking and …
-
First results on the assessment of impact damage of vegetables by means of the FEM approach
… post-harvest handling induce numerous mechanical impacts on vegetables. These impacts may cause damage such as black-spot bruise, resulting in severe economic losses. Impact forces and accelerations arising from collisions, are among the main indices taken into account when studying the damage of …
-
Development of a corn stover yield monitor
… was instrumented with load cells to measure the impact force of the corn stover on the impact plate. Instrumentation methods for the impact plate were evaluated to determine the most effective method to instrument the impact plate to measure the impact force of the stover.</p> <p>Field testing …
-
The dynamics of running and the possibilities of damping
… that when running on level surfaces, the initial impact forces exerted on the lower extremities are two to three times the individual's body weight. This report aims to address the problem of running and jogging injuries by examining the forces exerted on the body and developing a foot attachment …
-
MPM Modeling of the Impact of Compound Landslides on a Rigid Wall
Understanding the deformation mechanisms and the impact forces generated by landslides on structures is essential for risk assessment and improving the design of mitigation measures. This thesis studies the effect of different basal sliding characteristics of biplanar compound landslides on the …
-
Geometry optimization of dry ice blasting nozzle for the noise reduction using experimental validation
… the blasting medium sublimate during the surface impact will not leave a secondary contamination. However, on the negative side of dry ice blasting (DIB), it produces a high noise exposure. The noise exposure during a high blasting pressure may reach up to 130 dB which is considered a harmful …
-
The development of shaft friction and end bearing resistance for dynamically driven model piles
… tip.<br/>The data showed:-<br/>1. The pile top impact force was dependant on ram impact velocity only.<br/>2. The transient forces at the pile tip could be less than equal to or greater than the impact force depending on the nature of the bearing surface.<br/>3. The stress transfer curves …
-
Kalman filtering of IMU sensor for robot balance control
… static cases as well as after experiencing an impact force. Balance simulations were performed to control the center of mass location of a robot modeled as an inverted pendulum. The controlled center of mass trajectories with state estimates generated from Kalman filtering were compared, where …
-
Development of a biomechanical surrogate for the evaluation of commotio cordis protection
… of this event. It has been proven that impacts directly over the cardiac silhouette during a vulnerable period of the cardiac cycle can cause CC. In order to reduce the occurrence of CC in sports, chest protectors need to be tested for efficacy. Currently there is no biofidelic surrogate …
-
Epidemiology and Biomechanical Analysis of Facial Fractures
… the tolerance of the facial bones to blunt impact. The effects of restraint use, impact severity and impact direction on facial fractures were evaluated using the NASS-CDS database. The association between brain injury and facial fractures was also examined. The tolerance of the frontal …
-
Frontal collision analysis of City Car
… is to fold during the crash to help decrease the impact force experienced by the passengers. The experiment was conducted by running a simulation of the car crashing into a wall compared to that of a rigid car with no folding, and by building a one-fifth scale wooden model of the CityCar, running …
-
Correlation Of Acoustic Emission Parameters With Weight And Velocity Of Moving Vehicles
… that there is a linear correlation between the impact force and the acoustic emission parameters. Also a polynomial regression of second order was found between the speed of vehicle and acoustic emission parameters. Road testing was conducted to investigate the correlation between weight of the …
-
Numerical Modelling of Ball Bearing Stiffness to Predict Contact Stress Caused by Vibration Induced Gapping
… velocity, the collision acceleration and the impact force. Comparison of the Hertzian stress predicted by the author showed better agreement to experimental indentation damage (made by another investigator), than the CABARET predicted stress.
-
On the impact of arbitrary two-dimensional sections
… with high pressure on the body happens. Such an impact force often causes serious structure damage to the ships and offshore structures. The study of the water-entry impact problem is thus of fundamental interest and practical significance in naval architecture and marine engineering. We …
-
Design, and characterisation of impact based and non-contact piezoelectric harvesters for rotating objects
… of extracting electrical energy from rotational forces using impact based and non-contact based piezoelectric harvesters. In this work, the centripetal force is used as the main acting force that causes the piezoelectric harvesters to produce output power. In order to achieve this, the harvesters …
Page 1 of 3