Evaluation of the contact forces developed in the lower limb/orthosis interface for comfort design

Silva, Paula C.; Silva, Miguel T.; Martins, Jorge

doi:10.1007/s11044-010-9219-6

Cited by 50 publications

(25 citation statements)

References 27 publications

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“…Besides the Hunt and Crossley approach is valid for direct central and frictionless contact, it has been used by many researchers because of its simplicity and straightforward to implement [9,[128][129][130]. For instance, Guess et al [131] employed the Hunt and Crossley formulation to successfully model the interaction between tibia, femur and menisci in a global three-dimensional multibody knee model.…”

Section: Dissipative Contact Force Modelsmentioning

confidence: 99%

Compliant contact force models in multibody dynamics: Evolution of the Hertz contact theory

Machado

Moreira

Flores

et al. 2012

Mechanism and Machine Theory

547

265

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Over the last decades, several compliant contact force models have been proposed. However, no complete and systematic comparison has been done on these models, which provides information on their range of application and accuracy for use in different contact scenarios. Thus, the selection of an appropriate model for a given contact problem is still an important and challenging issue to be addressed. The Hertzian contact theory remains the foundation for almost all of the available force models, but by itself, it is not appropriate for most impacts in practice, due to the amount of energy dissipated during the impact. A good number of contact force models have been offered that augment the Hertzian law with a damping term to accommodate the energy loss during the impact process for small or moderate impact velocities. In this work, the main issues associated with the most common compliant contact force models of this type are analyzed. Results in terms of the dynamic simulations of multibody systems are presented, which allow for the comparison of the similarities and differences among the models considered.

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Section: Dissipative Contact Force Modelsmentioning

confidence: 99%

Compliant contact force models in multibody dynamics: Evolution of the Hertz contact theory

Machado

Moreira

Flores

et al. 2012

Mechanism and Machine Theory

547

265

View full text Add to dashboard Cite

show abstract

“…The subject of contact mechanics and its applications has received a great deal of attention over the last few decades, and still remains an active field of research and development [14][15][16][17][18][19][20]. There is no doubt that contact-impact events are ubiquitous in engineering and research activities, such as in railway dynamics [21][22][23], crashworthiness [24][25][26], robotics [27][28][29], biomechanics [30][31][32], mechanisms [33][34][35], and sound waves [36], to mention a few.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the viscoelastic constitutive models for frictionless contact interfaces in solids

Alves

Peixinho

Silva

et al. 2015

Mechanism and Machine Theory

198

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The nature of the constitutive contact force law utilized to describe contact-impact events in solid contact interfaces plays a key role in predicting the response of multibody mechanical systems and in the simulation of engineering applications. The goal of this work is to present a comparative study on the most relevant existing viscoelastic contact force models. In the sequel of this process, their fundamental characteristics are examined and their performances evaluated. Models developed based on the Hertz contact theory and augmented with a damping term to accommodate the dissipation of energy during the impact process, which typically is a function of the coefficient of restitution between the contacting solids, are considered in this study. In particular, the identified contact force models are compared in the present study for simple solid impact problems with the sole purpose of comparing the performance of the various models and examining the corresponding system behavior. The outcomes indicate that the prediction of the dynamic behavior of contacting solids strongly depends on the selection of the contact force model.

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“…The general motivation for this work comes from current interest in developing mathematical models for the dynamics of constrained multibody systems involving contact events between soft materials, such as in the case of biomechanical systems and bushing elements made with polymer materials [35][36][37][38][39][40][41]. In fact, modeling contacts with a high degree of energy dissipation plays a crucial role in the analysis, design and control of many mechanical systems in the measure that soft materials are characterized by low or medium values of the coefficient of restitution.…”

Section: Introductionmentioning

confidence: 99%

On the continuous contact force models for soft materials in multibody dynamics

et al. 2010

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Evaluation of the contact forces developed in the lower limb/orthosis interface for comfort design

Cited by 50 publications

References 27 publications

Compliant contact force models in multibody dynamics: Evolution of the Hertz contact theory

Compliant contact force models in multibody dynamics: Evolution of the Hertz contact theory

A comparative study of the viscoelastic constitutive models for frictionless contact interfaces in solids

On the continuous contact force models for soft materials in multibody dynamics

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