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学者姓名:靳忠民

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Laser Metal Direct Forming of the Customized Titanium Implants EI SCIE Scopus CSCD PKU
期刊论文 | 2017 , 46 (7) , 1924-1928 | RARE METAL MATERIALS AND ENGINEERING | IF: 0.29
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Abstract :

Laser metal direct forming technology was applied to manufacture customized titanium implants, and then titanium implants can be directly formed according to their CAD models. This method possesses a short manufacturing cycle. Additionally, the customized titanium implants manufactured in this method have good mechanical properties. The influences of curvature effect and inclination angle on the geometric precision of laser metal direct forming parts were studied for the establishment of the model design criteria. Therefore, the formed titanium implant could achieve high precision. Both mechanical properties and chemical composition of the manufactured customized titanium implants comply with relevant national and pharmaceutical industry standards. Two cases of customized titanium implants manufactured by laser metal direct forming have been successfully applied in clinical and have achieved good results.

Keyword :

implant customized laser metal direct forming

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GB/T 7714 Qin Mian , Liu Yaxiong , Wang Ling et al. Laser Metal Direct Forming of the Customized Titanium Implants [J]. | RARE METAL MATERIALS AND ENGINEERING , 2017 , 46 (7) : 1924-1928 .
MLA Qin Mian et al. "Laser Metal Direct Forming of the Customized Titanium Implants" . | RARE METAL MATERIALS AND ENGINEERING 46 . 7 (2017) : 1924-1928 .
APA Qin Mian , Liu Yaxiong , Wang Ling , Li Dichen , Jin Zhongmin , Liu Yanpu et al. Laser Metal Direct Forming of the Customized Titanium Implants . | RARE METAL MATERIALS AND ENGINEERING , 2017 , 46 (7) , 1924-1928 .
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Load application for the contact mechanics analysis and wear prediction of total knee replacement EI SCIE PubMed Scopus
期刊论文 | 2017 , 231 (5) , 444-454 | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE | IF: 1.124
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Abstract :

Tibiofemoral contact forces in total knee replacement have been measured at the medial and lateral sites respectively using an instrumented prosthesis, and predicted from musculoskeletal multibody dynamics models with a reasonable accuracy. However, it is uncommon that the medial and lateral forces are applied separately to replace a total axial load according to the ISO standard in the majority of current finite element analyses. In this study, we quantified the different effects of applying the medial and lateral loads separately versus the traditional total axial load application on contact mechanics and wear prediction of a patient-specific knee prosthesis. The load application position played an important role under the medial-lateral load application. The loading set which produced the closest load distribution to the multibody dynamics model was used to predict the contact mechanics and wear for the prosthesis and compared with the total axial load application. The medial-lateral load distribution using the present method was found to be closer to the multibody dynamics prediction than the traditional total axial load application, and the maximum contact pressure and contact area were consistent with the corresponding load variation. The predicted total volumetric wear rate and area were similar between the two load applications. However, the split of the predicted wear volumes on the medial and the lateral sides was different. The lateral volumetric wear rate was 31.46% smaller than the medial from the traditional load application prediction, while from the medial-lateral load application, the lateral side was only 11.8% smaller than the medial. The medial-lateral load application could provide a new and more accurate method of load application for patient-specific preclinical contact mechanics and wear prediction of knee implants.

Keyword :

Axial load application finite element contact mechanics total knee replacement wear prediction

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GB/T 7714 Zhang, Jing , Chen, Zhenxian , Wang, Ling et al. Load application for the contact mechanics analysis and wear prediction of total knee replacement [J]. | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE , 2017 , 231 (5) : 444-454 .
MLA Zhang, Jing et al. "Load application for the contact mechanics analysis and wear prediction of total knee replacement" . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE 231 . 5 (2017) : 444-454 .
APA Zhang, Jing , Chen, Zhenxian , Wang, Ling , Li, Dichen , Jin, Zhongmin . Load application for the contact mechanics analysis and wear prediction of total knee replacement . | PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE , 2017 , 231 (5) , 444-454 .
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双投影光固化成型方法研究 CSCD PKU
期刊论文 | 2017 , (2) , 149-154 | 西安交通大学学报
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快速成型 光固化成型 掩膜投影 微结构

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GB/T 7714 陈冬 , 王亚宁 , 刘亚雄 et al. 双投影光固化成型方法研究 [J]. | 西安交通大学学报 , 2017 , (2) : 149-154 .
MLA 陈冬 et al. "双投影光固化成型方法研究" . | 西安交通大学学报 2 (2017) : 149-154 .
APA 陈冬 , 王亚宁 , 刘亚雄 , 贺健康 , 王玲 , 连芩 et al. 双投影光固化成型方法研究 . | 西安交通大学学报 , 2017 , (2) , 149-154 .
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Prediction of Cervical Spinal Joint Loading and Secondary Motion Using a Musculoskeletal Multibody Dynamics Model Via Force-Dependent Kinematics Approach SCIE PubMed Scopus
期刊论文 | 2017 , 42 (24) , E1403-E1409 | SPINE | IF: 2.792
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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Study Design. A cervical spine biomechanical investigation using multibody dynamics. Objective. To develop a comprehensive cervical spine multibody dynamics model incorporated with the force-dependent kinematics (FDK) approach, and to study the influence of soft tissue deformation on the joint loading prediction. Summary of Background Data. Musculoskeletal multibody dynamics models have been widely used to analyze joint loading. Current cervical spine musculoskeletal models, however, neglect the joint internal motion caused by soft tissue deformation. A novel FDK approach is introduced, which can predict joint internal motion and spinal joint loading simultaneously. Methods. A comprehensive cervical spine musculoskeletal model with the posterior facet joints and essential ligaments was developed. To quantify the influence of soft tissue structures on joint loading prediction, four different models with different features were created. These newly developed models were validated, under flexion-extension movement. The predicted intervertebral disc loads (from C3-C4 to C5-C6) were compared with the published cadaveric experimental results. Moreover, the predicted facet joint forces, ligament forces, and anterior-posterior translations of instantaneous centers of rotation were also studied. Results. The obtained intervertebral disc loads were varied among different models. Model 3 provided the closest prediction of joint loading to the experimental results. Moreover, the facet joint and ligament forces were in similar range of magnitude as literature findings. The predicted instantaneous centers of rotation translational changes were in accordance with the in vivo kinematics observation. Conclusion. In the present study, a validated cervical spine musculoskeletal model was developed, using multibody dynamics and FDK approach. It can simulate the function of musculature and consider joint internal motion, and thus provides more reliable joint loading prediction. This newly developed cervical model can be used as an efficient tool to study the biomechanical behaviors of human cervical spine, and to understand the fundamental pathologies of spinal pains.

Keyword :

multibody dynamics force-dependent kinematics cervical spine musculoskeletal model joint loading

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GB/T 7714 Diao, Hao , Xin, Hua , Dong, Jun et al. Prediction of Cervical Spinal Joint Loading and Secondary Motion Using a Musculoskeletal Multibody Dynamics Model Via Force-Dependent Kinematics Approach [J]. | SPINE , 2017 , 42 (24) : E1403-E1409 .
MLA Diao, Hao et al. "Prediction of Cervical Spinal Joint Loading and Secondary Motion Using a Musculoskeletal Multibody Dynamics Model Via Force-Dependent Kinematics Approach" . | SPINE 42 . 24 (2017) : E1403-E1409 .
APA Diao, Hao , Xin, Hua , Dong, Jun , He, Xijing , Li, Dichen , Jin, Zhongmin . Prediction of Cervical Spinal Joint Loading and Secondary Motion Using a Musculoskeletal Multibody Dynamics Model Via Force-Dependent Kinematics Approach . | SPINE , 2017 , 42 (24) , E1403-E1409 .
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THE EFFECT OF ASPHERICITY OF ACETABULAR BEARING SURFACE ON CONTACT MECHANICS OF UHMWPE TOTAL HIP IMPLANTS BY FINITE ELEMENT ANALYSIS EI SCIE Scopus
期刊论文 | 2017 , 17 (1) | JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY | IF: 0.875
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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Abstract :

Asphericity and out-of-roundness are generally used to evaluate the manufacturing quality of ultra-high molecular weight polyethylene (UHMWPE) cup inner surfaces, which can potentially affect initial clinical wear and contribute to osteolysis of total hip arthroplasty. This study measured the location and magnitude of asphericity and the out-of-roundness value for four UHMWPE cups in a single set, and then investigated the effects of the asphericity on the contact mechanics of UHMWPE cups. A co-ordinate measuring machine (CMM) was used for the surface measurement and finite element analysis (FEA) was adopted for contact mechanics study. The results demonstrated that the asphericity varied between cups with the maximum value as 0.088 +/- 0.004 mm. Although such a value met the ISO specification, large difference of volume appeared for the asphericity above 0.060 mm. Actual surface profile accounting for the asphericity was found to affect the value of contact pressure and contact area by around 12%. The inferior asphericity resulted in a nonsmoothly distributed contact pressure, which had a negative effect on the contact mechanics of UHMWPE cups and the edge loading was predicted to occur for the sample with a large asphericity. In conclusion, the asphericity of UHMWPE cup could affect the contact mechanics of the articular bearings and may subsequently contribute to initial wear during bedding-in phase.

Keyword :

Total hip arthroplasty contact mechanics asphericity finite element analysis edge loading

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GB/T 7714 Zhang, Xuan , Wang, Ling , Peng, Xifeng et al. THE EFFECT OF ASPHERICITY OF ACETABULAR BEARING SURFACE ON CONTACT MECHANICS OF UHMWPE TOTAL HIP IMPLANTS BY FINITE ELEMENT ANALYSIS [J]. | JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY , 2017 , 17 (1) .
MLA Zhang, Xuan et al. "THE EFFECT OF ASPHERICITY OF ACETABULAR BEARING SURFACE ON CONTACT MECHANICS OF UHMWPE TOTAL HIP IMPLANTS BY FINITE ELEMENT ANALYSIS" . | JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY 17 . 1 (2017) .
APA Zhang, Xuan , Wang, Ling , Peng, Xifeng , Li, Dichen , He, Jiankang , Liu, Yaxiong et al. THE EFFECT OF ASPHERICITY OF ACETABULAR BEARING SURFACE ON CONTACT MECHANICS OF UHMWPE TOTAL HIP IMPLANTS BY FINITE ELEMENT ANALYSIS . | JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY , 2017 , 17 (1) .
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Effect of particle size gradation on the performance of glass-ceramic 3D printing process EI SCIE Scopus
期刊论文 | 2017 , 43 (1) , 578-584 | CERAMICS INTERNATIONAL | IF: 3.057
WoS CC Cited Count: 11 SCOPUS Cited Count: 12
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Abstract :

Particle size gradation is regarded as an effective method for overcoming the contradicting requirements in three-dimensional printing (3DP). In present work, particle size gradation was optimized to obtain both acceptable flowability of the powder material and high-strength 3D-printed glass-ceramic products. The effect of gradation on the printing process, sintering process and performance of the 3D-printed glass-ceramic products was investigated comprehensively. The glass-ceramic powders with three size ranges were mixed in certain proportions and applied to print parts. The result showed parts printed with powder mixed by 60 wt% 45100 gm and 40 wt% 0-25 mu m particles had satisfactory density of 1.60 g/cm(3) and bending strength of 13.8 MPa. The flowability decreased with an increasing proportion of fine particles. Part density was determined by the powder bulk density in the powder bed as well as the shrinkage during sintering while strength of part was found to be dependent on the sintering degree.

Keyword :

Flowability Particle size gradation Glass-ceramic Three-dimensional printing Mechanical properties

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GB/T 7714 Sun, Changning , Tian, Xiaoyong , Wang, Ling et al. Effect of particle size gradation on the performance of glass-ceramic 3D printing process [J]. | CERAMICS INTERNATIONAL , 2017 , 43 (1) : 578-584 .
MLA Sun, Changning et al. "Effect of particle size gradation on the performance of glass-ceramic 3D printing process" . | CERAMICS INTERNATIONAL 43 . 1 (2017) : 578-584 .
APA Sun, Changning , Tian, Xiaoyong , Wang, Ling , Liu, Yaxiong , Wirth, Cynthina M. , Guenster, Jens et al. Effect of particle size gradation on the performance of glass-ceramic 3D printing process . | CERAMICS INTERNATIONAL , 2017 , 43 (1) , 578-584 .
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Tilting separation analysis of bottom-up mask projection stereolithography based on cohesive zone model EI SCIE Scopus
期刊论文 | 2017 , 243 , 184-196 | JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | IF: 3.647
WoS CC Cited Count: 3 SCOPUS Cited Count: 7
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Abstract :

Compared with top-down stereolithography, bottom-up mask projection stereolithography can reduce the start filling volume of vat and is able to build components with high-viscosity materials. For general photosensitive materials, a separation process is required to detach the cured layer from the resin vat surface in order to accomplish the fabrication of current layer. The separation process can be achieved without damaging the part by utilizing appropriate platform motions including pulling-up, tilting and shearing, and covering inert film on the vat surface. The tilting separation is used in both industrial and academic area. However, there is a limited corresponding study compared with pulling-up separation.The mechanism of tilting separation and its effects on separation force and fabrication process are not clear. In this paper, an analytical model based on cohesive zone model was formed and a specialized experimental system was built. Experimental studies on the tilting effects on cohesive stiffness and fracture energy were conducted by collecting and analyzing separation force data. The results showed that changing exposure area function or the part fabrication orientation changed the cohesive stiffness, and increasing tilting separation velocity caused different increase in fracture energy when using different inert films. The results of this investigation can be used to choose the reasonable platform motion and process parameters by considering the part geometry and the characteristics of both inert film and materials. (C) 2016 Elsevier B.V. All rights reserved.

Keyword :

Tilting separation Pulling-up separation Separation force Cohesive zone model Bottom-up mask projection stereolithography Additive manufacturing

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GB/T 7714 Wu, Xiangquan , Lian, Qin , Li, Dichen et al. Tilting separation analysis of bottom-up mask projection stereolithography based on cohesive zone model [J]. | JOURNAL OF MATERIALS PROCESSING TECHNOLOGY , 2017 , 243 : 184-196 .
MLA Wu, Xiangquan et al. "Tilting separation analysis of bottom-up mask projection stereolithography based on cohesive zone model" . | JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 243 (2017) : 184-196 .
APA Wu, Xiangquan , Lian, Qin , Li, Dichen , Jin, Zhongmin . Tilting separation analysis of bottom-up mask projection stereolithography based on cohesive zone model . | JOURNAL OF MATERIALS PROCESSING TECHNOLOGY , 2017 , 243 , 184-196 .
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A patient-specific wear prediction framework for an artificial knee joint with coupled musculoskeletal multibody-dynamics and finite element analysis EI SCIE Scopus
期刊论文 | 2017 , 109 , 382-389 | TRIBOLOGY INTERNATIONAL | IF: 3.246
WoS CC Cited Count: 2 SCOPUS Cited Count: 3
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Abstract :

A novel wear prediction framework was developed by coupling a patient-specific lower extremity musculoskeletal multibody dynamics model with the finite element contact mechanics and wear model of total knee replacement. The tibiofemoral contact forces and kinematics were influenced by articular surface wear, and in turn, the variations from the knee dynamics resulted in increases in the volumetric wear of 404.41 mm(3) after 30 million cycle simulation from 380.86 mm(3) from the traditional wear prediction using fixed load/motions. The developed patient-specific wear prediction framework provided a reliable virtual platform for investigating articular surface wear of total knee replacements.

Keyword :

Finite-element method Musculoskeletal multibody dynamics Total knee replacement Wear prediction

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GB/T 7714 Zhang, Jing , Chen, Zhenxian , Wang, Ling et al. A patient-specific wear prediction framework for an artificial knee joint with coupled musculoskeletal multibody-dynamics and finite element analysis [J]. | TRIBOLOGY INTERNATIONAL , 2017 , 109 : 382-389 .
MLA Zhang, Jing et al. "A patient-specific wear prediction framework for an artificial knee joint with coupled musculoskeletal multibody-dynamics and finite element analysis" . | TRIBOLOGY INTERNATIONAL 109 (2017) : 382-389 .
APA Zhang, Jing , Chen, Zhenxian , Wang, Ling , Li, Dichen , Jin, Zhongmin . A patient-specific wear prediction framework for an artificial knee joint with coupled musculoskeletal multibody-dynamics and finite element analysis . | TRIBOLOGY INTERNATIONAL , 2017 , 109 , 382-389 .
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Mapping porous microstructures to yield desired mechanical properties for application in 3D printed bone scaffolds and orthopaedic implants EI SCIE Scopus
期刊论文 | 2017 , 133 , 62-68 | MATERIALS & DESIGN | IF: 4.525
WoS CC Cited Count: 7 SCOPUS Cited Count: 11
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Porous design of orthopaedic implants affords the advantages of minimizing stress shielding and improving the osseointegration and long-termstability. However, the marked error in the manufactured porous structure relative to the designed model yields limited application of the porous design. This study aimed to develop a methodology to derive the relationship between the porosity, the structural characteristic parameters and the mechanical properties of a typical structural unit, to lay the foundation of a porous structural design for 3D-printed implants with gradient modulus. Mathematical expressions related to porosity were determined based on various parametrical characteristics of porous units; the effective modulus of such a porous structure was studied under variable axial loading by using finite element analysis to gain insight into the anisotropic properties of the porous structure, and to evaluate the effects of parametrical variation on the aforementioned properties. For validation purposes, samples were manufactured via selective laser melting (SLM) 3D printing technology and mechanically tested. Results indicated that porous design can reduce the effective modulus of implants by 75-80%. A general methodology was developed for evaluating BCC structural units to determine design parameter correlations, the porosity and the effective modulus of the structure. (C) 2017 Published by Elsevier Ltd.

Keyword :

Mechanical property Orthopaedic implant 3D Printing Porous metal

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GB/T 7714 Wang, Ling , Kang, Jianfeng , Sun, Changning et al. Mapping porous microstructures to yield desired mechanical properties for application in 3D printed bone scaffolds and orthopaedic implants [J]. | MATERIALS & DESIGN , 2017 , 133 : 62-68 .
MLA Wang, Ling et al. "Mapping porous microstructures to yield desired mechanical properties for application in 3D printed bone scaffolds and orthopaedic implants" . | MATERIALS & DESIGN 133 (2017) : 62-68 .
APA Wang, Ling , Kang, Jianfeng , Sun, Changning , Li, Dichen , Cao, Yi , Jin, Zhongmin . Mapping porous microstructures to yield desired mechanical properties for application in 3D printed bone scaffolds and orthopaedic implants . | MATERIALS & DESIGN , 2017 , 133 , 62-68 .
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The effect of collagen fibril orientation on the biphasic mechanics of articular cartilage EI SCIE PubMed Scopus
期刊论文 | 2017 , 65 , 439-453 | JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS | IF: 3.239
WoS CC Cited Count: 10 SCOPUS Cited Count: 11
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The highly inhomogeneous distribution of collagen fibrils may have important effects on the biphasic mechanics of articular cartilage. However, the effect of the inhomogeneity of collagen fibrils has mainly been investigated using simplified three-layered models, which may have underestimated the effect of collagen fibrils by neglecting their realistic orientation. The aim of this study was to investigate the effect of the realistic orientation of collagen fibrils on the biphasic mechanics of articular cartilage. Five biphasic material models, each of which included a different level of complexity of fibril reinforcement, were solved using two different finite element software packages (Abaqus and FEBio). Model I considered the realistic orientation of fibrils, which was derived from diffusion tensor magnetic resonance images. The simplified three-layered orientation was used for Model 2. Models 3-5 were three control models. The realistic collagen orientations obtained in this study were consistent with the literature. Results from the two finite element implementations were in agreement for each of the conditions modelled. The comparison between the control models confirmed some functions of collagen fibrils. The comparison between Models 1 and 2 showed that the widely-used three-layered inhomogeneous model can produce similar fluid load support to the model including the realistic fibril orientation; however, an accurate prediction of the other mechanical parameters requires the inclusion of the realistic orientation of collagen fibrils. (C) 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.

Keyword :

Biomechanics Fibril-reinforced biphasic model DT-MRI Articular cartilage Collagen fibril

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GB/T 7714 Meng, Qingen , An, Shuqiang , Damion, Robin A. et al. The effect of collagen fibril orientation on the biphasic mechanics of articular cartilage [J]. | JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS , 2017 , 65 : 439-453 .
MLA Meng, Qingen et al. "The effect of collagen fibril orientation on the biphasic mechanics of articular cartilage" . | JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS 65 (2017) : 439-453 .
APA Meng, Qingen , An, Shuqiang , Damion, Robin A. , Jin, Zhongmin , Wilcox, Ruth , Fisher, John et al. The effect of collagen fibril orientation on the biphasic mechanics of articular cartilage . | JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS , 2017 , 65 , 439-453 .
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