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International journal of experimental and computational biomechanics最新文献

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Subject-specific finite element model of knee: experimental validation using composite and bovine specimens 受试者特定的膝关节有限元模型:使用复合材料和牛标本的实验验证
International journal of experimental and computational biomechanics Pub Date : 2009-11-11 DOI: 10.1504/IJECB.2009.029190
J. Dressler, A. Au, J. Carey, A. Amirfazli
{"title":"Subject-specific finite element model of knee: experimental validation using composite and bovine specimens","authors":"J. Dressler, A. Au, J. Carey, A. Amirfazli","doi":"10.1504/IJECB.2009.029190","DOIUrl":"https://doi.org/10.1504/IJECB.2009.029190","url":null,"abstract":"This work describes the experimental validation of lower limb finite element models using a composite femur, tibia and bovine tibia. Experimental and predicted equivalent strains and principal strain magnitudes and directions were compared to provide all the necessary information for validation studies. Inaccurate geometry, loading conditions and material properties are frequent errors occurring in validation studies; a sensitivity analysis was done to investigate how the latter two affect the validation. Results were most affected when the directions of the loads were not correctly implemented due to slight misalignment between test apparatus loading axis and the vertical axis in the FE environment.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"146"},"PeriodicalIF":0.0,"publicationDate":"2009-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.029190","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Experimental investigation of carotid artery haemodynamics in an anatomically realistic model 解剖模型颈动脉血流动力学的实验研究
International journal of experimental and computational biomechanics Pub Date : 2009-11-11 DOI: 10.1504/IJECB.2009.029192
N. Buchmann, M. Jermy, C. Nguyen
{"title":"Experimental investigation of carotid artery haemodynamics in an anatomically realistic model","authors":"N. Buchmann, M. Jermy, C. Nguyen","doi":"10.1504/IJECB.2009.029192","DOIUrl":"https://doi.org/10.1504/IJECB.2009.029192","url":null,"abstract":"Fluid mechanic forces play a key role in the early development and progression of cardiovascular diseases, which predominantly occurs in areas of disturbed flow and low wall shear stress (WSS). In the present study, we perform particle image velocimetry (PIV) measurements in an anatomically realistic transparent flow phantom of a human carotid artery. Steady blood flow conditions are simulated and a novel interfacial PIV technique (iPIV) is introduced to measure WSS with increased spatial resolution and accuracy compared to conventional methods. The branching of the carotid artery introduces significant secondary flow motion with flow separation and reversal only occurring in the external carotid artery. Wall shear stress is measured along the inner and outer vessel walls and is on average higher in the internal carotid and lower in the external carotid artery. Furthermore, results are compared to those in a geometrical idealised model and with previously published WSS data.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"172"},"PeriodicalIF":0.0,"publicationDate":"2009-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.029192","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Tribological behaviour of the 304L/HDPE contact: application for the knee prostheses 304L/HDPE触点的摩擦学性能:在膝关节假体中的应用
International journal of experimental and computational biomechanics Pub Date : 2009-11-11 DOI: 10.1504/IJECB.2009.029200
M. Boujelbene, M. Kharrat, M. Dammak, A. Maalej
{"title":"Tribological behaviour of the 304L/HDPE contact: application for the knee prostheses","authors":"M. Boujelbene, M. Kharrat, M. Dammak, A. Maalej","doi":"10.1504/IJECB.2009.029200","DOIUrl":"https://doi.org/10.1504/IJECB.2009.029200","url":null,"abstract":"A specific wear and friction device was used in this work to analyse the tribological behaviour of the tibial insert used in total knee arthroplasty (TKA). This wear and friction device reproduced the movements of flexion extension (F/E) and anterior posterior translation (A/P). Two sinusoidal movements with frequency 1Hz and amplitudes 8.185° and 5 mm were imposed respectively on a metal cylinder and a flat polymer sample which were in contact under a constant normal load. Each one of these movements was simulated separately. The polymer used was the HDPE (high density polyethylene). Two values of the normal load (Fn=500N and Fn=1000N) were considered. For each one of these two values, tests with different numbers of cycles were carried out. The tribological response of the contact was analysed through the evolution with the number of cycles of the friction coefficient, the loss in mass of the samples and the wear zone with scanning electron micrograph observation. The results indicate that the tribological behaviour of the HDPE depends on the type of the imposed movement.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"214"},"PeriodicalIF":0.0,"publicationDate":"2009-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.029200","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Variable stiffness rheological model for interrelating creep and stress relaxation in ligaments 韧带蠕变与应力松弛相关的变刚度流变模型
International journal of experimental and computational biomechanics Pub Date : 2009-02-05 DOI: 10.1504/IJECB.2009.022861
M. Taha, S. Neidigk, A. Noureldin
{"title":"Variable stiffness rheological model for interrelating creep and stress relaxation in ligaments","authors":"M. Taha, S. Neidigk, A. Noureldin","doi":"10.1504/IJECB.2009.022861","DOIUrl":"https://doi.org/10.1504/IJECB.2009.022861","url":null,"abstract":"Creep and stress relaxation are two fundamental operational principles of joints that are significant for joint laxity. Modelling and relating creep and stress relaxation of ligaments is important if synthetic grafts (e.g., artificial ligaments) are to be developed and used for reconstructive surgery. This article discusses the use of rheological models to simulate creep and stress relaxation of ligaments. Modelling is performed using theory of linear viscoelasticity. Using principles of system identification, the parameters of constant and variable stiffness rheological models are determined considering experimentally measured stress relaxation of the medial collateral ligaments (MCL). The models are then tested to predict experimentally measured creep of the MCL. The proposed method proves the need to consider collagen fibre recruitment to interrelate creep and stress relaxation of ligaments. The results show that a rheological model with variable stiffness is capable of predicting creep from experimentally measured stress relaxation with a reasonable accuracy.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"96"},"PeriodicalIF":0.0,"publicationDate":"2009-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.022861","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Modelling of mechanical properties of electrospun nanofibre network 静电纺纳米纤维网络力学性能的建模
International journal of experimental and computational biomechanics Pub Date : 2009-02-05 DOI: 10.1504/IJECB.2009.022858
Xiaofan Wei, Z. Xia, S. Wong, A. Baji
{"title":"Modelling of mechanical properties of electrospun nanofibre network","authors":"Xiaofan Wei, Z. Xia, S. Wong, A. Baji","doi":"10.1504/IJECB.2009.022858","DOIUrl":"https://doi.org/10.1504/IJECB.2009.022858","url":null,"abstract":"Electrospun nanofibres are widely investigated as extra-cellular matrix for tissue engineering and biomedical applications. Little is understood on the deformation mechanics of spun fibre mats. A model is developed to predict the deformation behaviour of randomly-oriented electrospun nanofibre network/mats with the fibre-fibre fusion and van der Waals interaction. The nanofibres in the mat are represented by chains of beads; the interactions between the beads are described by bonded (stretch, bending and torsion) and non-bonded (van der Waals) potentials. Stress-strain curves and dynamics fracture are predicted by this model. The results show that the fibre-fibre fusion has a significant effect on the tensile strength of the mats. Increasing the number of fusion points in the mat results in an increase in strength, but over-fusion may lead to lower fracture energy. The predicted stress-strain relationships are consistent with the experimental results.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"45-57"},"PeriodicalIF":0.0,"publicationDate":"2009-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.022858","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 69
Initial fixation of a femoral knee component: an in vitro and finite element study 股骨膝关节组件的初始固定:一项体外和有限元研究
International journal of experimental and computational biomechanics Pub Date : 2009-02-02 DOI: 10.1504/IJECB.2009.022857
Travis Burgers, James J. Mason, H. Ploeg
{"title":"Initial fixation of a femoral knee component: an in vitro and finite element study","authors":"Travis Burgers, James J. Mason, H. Ploeg","doi":"10.1504/IJECB.2009.022857","DOIUrl":"https://doi.org/10.1504/IJECB.2009.022857","url":null,"abstract":"Loosening is the primary cause of total knee arthroplasty implant failure; therefore, to investigate this failure mode, femoral knee components were implanted in vitro on three cadaveric femurs. Bone-implant finite element (FE) models were created to predict the initial fixation of the interface of each femur. Initial fixation of the femoral knee component was successfully measured with the strain-gauged implants. Specimen-specific FE models were calibrated using the in vitro strain measurements and used to assess initial fixation. Initial fixation was shown to increase with bone density. The geometry of the implant causes the distal femur to deform plastically. It also causes higher stresses in the lateral side and higher pressures on the lateral surfaces. The implementation of plasticity in the bone material model in the FE model decreased these strains and pressures considerably from a purely elastic model, which demonstrated the importance of including plasticity.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"23"},"PeriodicalIF":0.0,"publicationDate":"2009-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.022857","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Precision, repeatability and accuracy of Optotrak® optical motion tracking systems Optotrak®光学运动跟踪系统的精度、可重复性和准确性
International journal of experimental and computational biomechanics Pub Date : 2009-02-02 DOI: 10.1504/IJECB.2009.022862
Jillian Schmidt, Devin R. Berg, H. Ploeg, L. Ploeg
{"title":"Precision, repeatability and accuracy of Optotrak® optical motion tracking systems","authors":"Jillian Schmidt, Devin R. Berg, H. Ploeg, L. Ploeg","doi":"10.1504/IJECB.2009.022862","DOIUrl":"https://doi.org/10.1504/IJECB.2009.022862","url":null,"abstract":"In the field of biomechanics, optical motion tracking systems are commonly used to record human motion and assist in surgical navigation. Recently, motion tracking systems have been used to track implant and bone motion on a micron-level. The present study evaluated four different Optotrak® motion tracking systems to determine the precision, repeatability and accuracy under static testing conditions. The distance between the camera systems and the rigid body, as well as the tilt angle of the rigid body, did affect the resulting precision, repeatability and accuracy of the camera systems. The precision and repeatability, calculated as the within-trial and between-trial standard deviations, respectively, were less than 30 µm; with some configurations producing precision and repeatability less than 1 µm. The accuracy was less than 0.53% of the total displacement for the in-plane motion and less than 1.56% of the total displacement for the out-of-plane motion.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"114"},"PeriodicalIF":0.0,"publicationDate":"2009-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.022862","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 51
Histomorphological and mechanical property correlations in rabbit tibial plateau cartilage based on a fibril-reinforced biphasic model 基于纤维增强双相模型的兔胫骨平台软骨组织形态学和力学性能的相关性
International journal of experimental and computational biomechanics Pub Date : 2009-02-02 DOI: 10.1504/IJECB.2009.022859
N. Golenberg, Eugene Kepich, R. Haut
{"title":"Histomorphological and mechanical property correlations in rabbit tibial plateau cartilage based on a fibril-reinforced biphasic model","authors":"N. Golenberg, Eugene Kepich, R. Haut","doi":"10.1504/IJECB.2009.022859","DOIUrl":"https://doi.org/10.1504/IJECB.2009.022859","url":null,"abstract":"The rabbit knee joint has frequently been used to study the mechanical properties of articular cartilage using various computational models. These models, however, vary in their ability to extract comparable material properties of cartilage from experimental data, resulting in inconsistencies in the data from various laboratories. A more complex, fibril-reinforced biphasic model more accurately fits the response of the cartilage by incorporating a collagen fibre network within the matrix. Indentation-relaxation tests were conducted on the medial and lateral facets in areas covered and uncovered by the meniscus on the rabbit tibial plateau. Gross and histological data were analysed and correlated with the mechanical properties. The fibril-reinforced biphasic model accurately fit the entire experimental curve extracting both the instantaneous (fibre modulus) and equilibrium (matrix modulus) responses and tissue permeability. The data was found significant at all sites. Significant correlations were also doc...","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"58"},"PeriodicalIF":0.0,"publicationDate":"2009-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.022859","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
A comparison of Young's modulus for normal and diseased human eardrums at high strain rates 在高应变率下正常和患病人耳膜杨氏模量的比较
International journal of experimental and computational biomechanics Pub Date : 2009-02-02 DOI: 10.1504/IJECB.2009.022856
Huiyang Luo, Hongbing Lu, C. Dai, R. Gan
{"title":"A comparison of Young's modulus for normal and diseased human eardrums at high strain rates","authors":"Huiyang Luo, Hongbing Lu, C. Dai, R. Gan","doi":"10.1504/IJECB.2009.022856","DOIUrl":"https://doi.org/10.1504/IJECB.2009.022856","url":null,"abstract":"The viscoelastic properties of a human eardrum or tympanic membrane (TM) have not been fully characterised in the auditory frequency range, despite the fact that these properties are critical data as input in modelling the acoustic transmission in a human ear. In this paper using a miniature split Hopkinson tension bar (SHTB), we investigated the mechanical behaviour of TM at high strain rates, corresponding approximately to the behaviour at high frequency. The Young's modulus values of diseased human TMs are determined as 63.4-79.2 MPa in the radial direction, and 33.1-42.8 MPa in the circumferential direction at strain rates 300-2000 s -1 , results are compared with those for normal TMs. The comparison indicates that normal human TMs show stronger dependence on high strain rates. The measured Young's modulus is converted into complex Young's modulus in the frequency domain in the frequency range of 300-2000 Hz.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2009-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.022856","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
The role of fluid dynamics in plaque excavation and rupture in the human carotid bifurcation: a computational study 流体动力学在人类颈动脉分叉斑块挖掘和破裂中的作用:一项计算研究
International journal of experimental and computational biomechanics Pub Date : 2009-02-02 DOI: 10.1504/IJECB.2009.022860
Scott T. Lovald, J. Heinrich, T. Khraishi, H. Yonas, S. Pappu
{"title":"The role of fluid dynamics in plaque excavation and rupture in the human carotid bifurcation: a computational study","authors":"Scott T. Lovald, J. Heinrich, T. Khraishi, H. Yonas, S. Pappu","doi":"10.1504/IJECB.2009.022860","DOIUrl":"https://doi.org/10.1504/IJECB.2009.022860","url":null,"abstract":"A 3D computational fluid dynamics model of the human carotid bifurcation has been created to explore plaque excavation and plaque rupture. The model considers different degrees of atherosclerotic stenosis, the form of which is determined using computerised tomography scans of a patient with moderate plaque stenosis. The results suggest that 70% stenosis will diminish blood flow to the brain from 245 ml/min to 71 ml/min. Pressure in the 50% stenosis model is increased by only 3.3%, while pressure in the 70% and 80% stenosis models are increased by 8.8% and 15.4%, respectively. Starting at 30% stenosis, each increase of 10% stenosis increases the peak wall shear stress value by a factor of two. Severely elevated magnitudes in the product of the pressure and the wall shear stress gradient were found on the upstream face of the stenosis. In specific cases, these peaks can be correlated to excavation points observed clinically.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"1 1","pages":"76"},"PeriodicalIF":0.0,"publicationDate":"2009-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2009.022860","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
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