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.
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Showing 1 to 11 of 11 for “"Joint-Reaction Forces"”.
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Estimating Uncertainties in the Joint Reaction Forces of Construction Machinery
… the propagation of uncertainties in the input forces through a mechanical system. The system of interest was a wheel loader, but the methodology developed can be applied to any multibody systems. The modeling technique implemented focused on efficiently modeling stochastic systems for which the …
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Occupational Biomechanics of Tree-Planters: A study of musculoskeletal symptoms, posture and joint reaction forces in Ontario tree-planters
… three-dimensional upper limb and trunk relative joint angles during commonly used tree seedling unloading methods. Results showed trunk rotation up to 50 degrees combined with deep trunk flexion during parts of the task. Trunk flexion and rotation were significantly less when the tree seedling …
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Theoretical prediction of joint reaction force in a dynamic general 3-d pendulum tree model for human or animal motion
… coordinates are applied to predict dynamic joint reaction forces in an idealized flexible model of a branched 3-D pendulum tree system. The number of segments and joints on the tree are adjustable as is the branching tree pattern. The segments that comprise the tree are assumed to be one- …
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Computational Investigation of the Biomechanics of Babywearing in Regards to Developmental Dysplasia of the Hip
… either loose or otherwise unstable. DDH causes a joint instability where the femoral head is not properly situated inside the acetabulum. Etiology of the condition is in part congenital and developmental, with a difference of DDH prevalence between ethnicities. Incidence of DDH is also in some …
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Modelo biomecânico de corpo inteiro com coordenadas naturais para análise de movimento humano
… force platforms collected hands and feet floor reaction forces and torques. Kinematics was measured by a reflective-markers system and joint angles calculated by a custom kinematical model. A multibody system model, based on redundant natural coordinates, was developed, containing 21 segments …
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Theoretical framework for predicting joint reaction and ground reaction forces in a dynamic pendulum tree model of human motion
… coordinates are applied to find ground and joint reaction forces on the human body modeled as a general branched 2-D pendulum tree system with arbitrary segments and arbitrarily distributed point masses. A theoretical framework is established for predicting these constraint forces during …
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Investigating the biomechanics of a lizard skull using advanced computer modelling techniques with experimental validation
… (MDA) on a biting lizard skull so that bite forces, joint forces, ligament forces and muscle forces could be accurately predicted. Then, using this MDA load data stresses and strains within the skull were assessed using finite element analysis (FEA). These FE analyses were used to assess …
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Multibody Dynamics Modeling and System Identification for a Quarter-Car Test Rig with McPherson Strut Suspension
… to be able to predict the dynamic response and joint reaction forces of a quarter-car suspension. This need is addressed by this study through development and system identification of both a linear and a non-linear multibody dynamics McPherson strut quarter-car suspension model. Both models are …
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Gait analysis of the hind limb in Labrador Retrievers with and without cranial cruciate ligament disease
… leading cause of lameness affecting the stifle joints of large breed dogs, especially Labrador Retrievers. Although CCL disease has been studied extensively, its exact pathogenesis and the primary cause leading to CCL rupture remain controversial. However, weakening secondary to repetitive …
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The effects of mid-air adjustments on knee joint loading when landing from a jump
… of the most common injuries involving the knee joint is the Anterior Cruciate Ligament (ACL) tear. Female basketball and soccer players have about 3 times higher risk of ACL injury versus male athletes (Prodromos et al., 2007). Female athletes alter their motion pattern during the landing phase …
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Musculoskeletal modeling and finite element analysis of the proximal juvenile femur
… results revealed some differences. Ground reaction force in the 3 year old showed a higher heel strike compared to a higher toe off observed in adult during the gait cycle, indicating a lack of control in the 3 year old. Furthermore the 3 year old, compared to the other ages, had different …