International journal of experimental and computational biomechanics最新文献_第5页

Biomechanical parameters of the brain under blast loads with and without helmets 带头盔和不带头盔爆炸载荷下大脑的生物力学参数

International journal of experimental and computational biomechanics Pub Date : 2014-04-14 DOI: 10.1504/IJECB.2014.060400

M. S. Jazi, A. Rezaei, G. Karami, F. Azarmi

引用次数: 11

Effects of stent length, transition length and overexpansion in stented coronary arteries 支架长度、过渡长度和冠状动脉过度扩张的影响

International journal of experimental and computational biomechanics Pub Date : 2014-04-14 DOI: 10.1504/IJECB.2014.060403

Naresh K. C. Selvarasu, D. Tafti

引用次数: 0

Material selection of acetabular component in human hip prosthesis using finite element concepts 基于有限元概念的人工髋关节髋臼构件材料选择

International journal of experimental and computational biomechanics Pub Date : 2013-09-26 DOI: 10.1504/IJECB.2013.056519

M. Kalayarasan, L. Prakash, Subramaniam Shankar

{"title":"Material selection of acetabular component in human hip prosthesis using finite element concepts","authors":"M. Kalayarasan, L. Prakash, Subramaniam Shankar","doi":"10.1504/IJECB.2013.056519","DOIUrl":"https://doi.org/10.1504/IJECB.2013.056519","url":null,"abstract":"Hip joint replacement is an important issue in orthopaedic surgery. The success of the artificial hip replacement depends upon proper material selection, structure and shape of the prosthesis. Many orthopaedic analyses have been tried with different materials, but ended with partial success on the application side. The main objective of this paper is to extend the acetabular component finite element model of human hip prosthesis to investigate the maximum von Mises stress, contact pressure, contact radius and mean contact pressure to yield strength ratio for different combinations of bio-compatible materials. Eight different geometrical parameters are considered in the current study. The materials used are Co-Cr alloy, Co-Cr-Mo alloy, ultra high molecular weight polyethylene (UHMWPE) and alumina. To guarantee good clinical results in total hip replacement (THR), it is predicted from this extensive analysis that cobalt chromium paired with UHMWPE provides optimum performance in all the conditions. The analysis demonstrates that the implant with larger head radius, cup radius, and UHMWPE cup thickness with decrease in radial clearance value yields better mechanical performance. The finite element results are also compared with the experimental data of Jin et al. (1999) and found to be in good agreement with each other.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"2 1","pages":"118"},"PeriodicalIF":0.0,"publicationDate":"2013-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2013.056519","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744903","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: 13

Development of a finite element model to study the torsional fracture strength of an analogue tibia with bicortical holes 建立具有双皮质孔的模拟胫骨扭转断裂强度有限元模型

International journal of experimental and computational biomechanics Pub Date : 2013-09-26 DOI: 10.1504/IJECB.2013.056528

K. M. Reuter, Alexander C.M. Chong, Viswanathan Madhavan, Paul H. Wooley, Mark Virginia, H. Lankarani

{"title":"Development of a finite element model to study the torsional fracture strength of an analogue tibia with bicortical holes","authors":"K. M. Reuter, Alexander C.M. Chong, Viswanathan Madhavan, Paul H. Wooley, Mark Virginia, H. Lankarani","doi":"10.1504/IJECB.2013.056528","DOIUrl":"https://doi.org/10.1504/IJECB.2013.056528","url":null,"abstract":"Fractured bones are often stabilised with orthopaedic fracture plates and screws until healed. If the plates and screws are removed, the vacant screw holes introduce a potential site for re-fracture. This study is aimed at simulating a laboratory torsional fracture test of a composite analogue tibia with vacant screw holes using a finite element (FE) model. This FE model is set up the same as the experimental torsion test, with a section from the distal portion of the tibia. The FE model contains over 35k second-order brick elements and nearly 165k nodes. It utilises an isotropic linear elastic material law with material properties obtained from the analogue tibia manufacturer. Comparisons between the experimental model and the FE model consider the fracture torque, fracture angle, and specific torsional stiffness. Stress contours of the FE model are compared to the fracture path of the experimental model. The FE model predicts the fracture location and a fracture torque within the standard deviation of that determined experimentally.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"2 1","pages":"158"},"PeriodicalIF":0.0,"publicationDate":"2013-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2013.056528","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744927","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

Numerical simulation of transport and deposition of micro-particles in two-phase flow in a human upper airway model from CT images 基于CT图像的人体上呼吸道两相流中微颗粒运移和沉积的数值模拟

International journal of experimental and computational biomechanics Pub Date : 2013-09-26 DOI: 10.1504/IJECB.2013.056542

T. B. Gorji, N. Fatouraee, A. Mozaffari

{"title":"Numerical simulation of transport and deposition of micro-particles in two-phase flow in a human upper airway model from CT images","authors":"T. B. Gorji, N. Fatouraee, A. Mozaffari","doi":"10.1504/IJECB.2013.056542","DOIUrl":"https://doi.org/10.1504/IJECB.2013.056542","url":null,"abstract":"In this paper the air flow for typical inhalation rates as well as transport and deposition of particles in a realistic human upper airway model were analysed using a validated ﬁnite-volume code with user-enhanced programmes. Most important parameters affecting deposition of particles are inlet flow rate, airway geometry and geometric and physical characteristics of particles. The tubular airway model in this study consists of upper trachea-bronchial airways starting from trachea (G0) to second generation of bifurcations (G2) reconstructed from computerised tomography (CT) data of a healthy human. The low Reynolds number (LRN) k-ω turbulence model was used to simulate the laminar to turbulent occurred airflow. The results show that deposition efficiencies (DE) are typically larger during high level breathing (Qin = 60 l/min) than low-level breathing (Qin = 15 l/min) and DE is significantly larger in the right bronchial airway to the left, mainly because of the slightly greater dimensions of the right bron...","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"2 1","pages":"171"},"PeriodicalIF":0.0,"publicationDate":"2013-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2013.056542","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744946","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: 1

Multiaxial spine testing apparatus: system characterisation by evaluation of analogue and cadaveric lumbar spines 多轴脊柱试验装置:通过评价模拟腰椎和尸体腰椎的系统特性

International journal of experimental and computational biomechanics Pub Date : 2013-09-26 DOI: 10.1504/IJECB.2013.056544

Zachary A. Dooley, Alexander W. L. Turner, G. Bryan Corwall

{"title":"Multiaxial spine testing apparatus: system characterisation by evaluation of analogue and cadaveric lumbar spines","authors":"Zachary A. Dooley, Alexander W. L. Turner, G. Bryan Corwall","doi":"10.1504/IJECB.2013.056544","DOIUrl":"https://doi.org/10.1504/IJECB.2013.056544","url":null,"abstract":"A custom 6 degrees-of-freedom test system was developed to collect unconstrained pure-moment biomechanical data from excised multi-segmental human spines. In this study, two characterisation methods were utilised. First, a polyethylene analogue model was created to establish test system baseline performance. Second, 22 lumbar spines (L1–L5) were tested to understand system operation under actual usage accounting for specimen stiffness and coupled motions. Each lumbar spine was tested in the anatomical planes (flexion-extension, lateral bending, and axial rotation) under two different conditions (intact and after implantation with an interbody cage at L3–L4). Specimen range of motion, neutral zone, and force/torque component errors generated by the test system were similar to previously reported data. Pure-moments were repeatable throughout the experiment in both cadaveric conditions, indicated by consistency in range of motion and neutral zone at the non-index levels. This characterisation will assist with interpretation of experimental data generated by the test system.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"2 1","pages":"189"},"PeriodicalIF":0.0,"publicationDate":"2013-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2013.056544","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744961","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: 6

Plastic behaviour of microstructural constituents of cortical bone tissue: a nanoindentation study 皮质骨组织微结构成分的塑性行为:纳米压痕研究

International journal of experimental and computational biomechanics Pub Date : 2013-09-26 DOI: 10.1504/IJECB.2013.056521

A. Abdel-Wahab, V. Silberschmidt

{"title":"Plastic behaviour of microstructural constituents of cortical bone tissue: a nanoindentation study","authors":"A. Abdel-Wahab, V. Silberschmidt","doi":"10.1504/IJECB.2013.056521","DOIUrl":"https://doi.org/10.1504/IJECB.2013.056521","url":null,"abstract":"A mechanical behaviour of bone tissues is defined by mechanical properties of its microstructural constituents. Also, those properties are important as an input for finite-element models of cortical bone to simulate its deformation and fracture behaviours at the microstructural level. The aim of this study was to investigate a post-yield behaviour of osteonal cortical bone’s microstructural constituents at different loading rates, maximum load levels and dwell times; nanoindentation with a spherical-diamond-tip indenter was employed to determine it. The nanoindentation results revealed significant difference in stiffness values of cortical bone’s microstructural features –interstitial matrix and osteons. Similarly, interstitial matrix exhibited a stiffer post-yield behaviour compared to that of osteons that reflects the relationship between the post-yield behaviour and collagen maturity. In addition, both osteons and interstitial matrix demonstrated a time-dependent behaviour. However, in order to assess elastic-plastic behaviour accurately, an effect of viscosity on nanoindentation results was reduced by using a time-delay method.","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"2 1","pages":"136-157"},"PeriodicalIF":0.0,"publicationDate":"2013-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJECB.2013.056521","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66744914","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

Influence of surrounding tissues on biomechanics of aortic wall. 周围组织对主动脉壁生物力学的影响

International journal of experimental and computational biomechanics Pub Date : 2013-09-01 DOI: 10.1504/IJECB.2013.056516

Jungsil Kim, Brooke Peruski, Chris Hunley, Sebastian Kwon, Seungik Baek

{"title":"Influence of surrounding tissues on biomechanics of aortic wall.","authors":"Jungsil Kim, Brooke Peruski, Chris Hunley, Sebastian Kwon, Seungik Baek","doi":"10.1504/IJECB.2013.056516","DOIUrl":"10.1504/IJECB.2013.056516","url":null,"abstract":"<p><p>The present study investigates effects of surrounding tissues and non-uniform wall thickness on the biomechanics of the thoracic aorta. We construct two idealised computational models exemplifying the importance of surrounding tissues and non-uniform wall thickness, namely the uniform-thickness model and the histology image-based model. While the former neglects a connective tissue layer surrounding the aorta, the latter takes it into account with non-uniform wall thickness. Using plane strain finite element analysis, stress distributions in the aortic media between the two models are compared. The histology image-based model substantially enhances the uniformity of stress throughout the aortic media. Furthermore, the altered mechanical properties of surrounding tissues change the stress distribution. These results suggest that surrounding tissues and non-uniform wall thickness should be included in biomechanical analysis to better understand regional adaptation of the aortic wall during normal physiological conditions or pathological conditions such as aortic aneurysms and dissections.</p>","PeriodicalId":90184,"journal":{"name":"International journal of experimental and computational biomechanics","volume":"2 2","pages":"105-117"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4096287/pdf/nihms-493087.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"32512154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The path to developing realistic finite element long bone models 开发逼真的长骨有限元模型的途径

International journal of experimental and computational biomechanics Pub Date : 2012-10-16 DOI: 10.1504/IJECB.2012.049775

A. Au, A. Amirfazli

引用次数: 0

Cell contraction of an elastic substrate assessed by an axisymmetric model 用轴对称模型评估弹性基底的细胞收缩

International journal of experimental and computational biomechanics Pub Date : 2012-10-16 DOI: 10.1504/IJECB.2012.049780

M. Kroon

引用次数: 0