International Journal of Mechanical and Materials Engineering最新文献_第7页

Development of calcium fluoride thin film on Ti-6Al-4V material by a dip coating process with an intermediate shellac layer for biocompatible orthopedic applications 在Ti-6Al-4V材料上浸涂中间紫胶层制备生物相容性矫形用氟化钙薄膜

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2021-05-31 DOI: 10.1186/s40712-021-00130-w

A. Ritwik, K. K. Saju

{"title":"Development of calcium fluoride thin film on Ti-6Al-4V material by a dip coating process with an intermediate shellac layer for biocompatible orthopedic applications","authors":"A. Ritwik, K. K. Saju","doi":"10.1186/s40712-021-00130-w","DOIUrl":"https://doi.org/10.1186/s40712-021-00130-w","url":null,"abstract":"Calcium fluoride (CaF2) is widely used for different bio applications ranging from biomedical imaging to cell labeling. The biocompatible properties of CaF2 combined with superior mechanical properties of titanium alloy makes it a perfect choice for orthopedic and dental implants. A dip-coating process was employed to develop a thin film of CaF2 coating on Ti6Al4V material with an intermediate thin layer of shellac (natural resin). The developed coating was subjected to X-ray powder diffraction method (XRD) and scanning electron microscopy (SEM) to evaluate the surface characteristics. The dip-coated implant material was also subjected to mechanical property evaluation, dissolution behavior study, and corrosion behavior study. In vitro study of the developed implant material was also carried out to assess the biocompatibility. The obtained results suggest use of CaF2 coating developed by this method for producing biocompatible orthopedic implants.","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"16 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-021-00130-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4066042","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: 3

Study of biaxial mechanical properties of the passive pig heart: material characterisation and categorisation of regional differences 被动猪心脏双轴力学性能的研究:材料表征和区域差异的分类

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2021-04-20 DOI: 10.1186/s40712-021-00128-4

Fulufhelo Nemavhola

{"title":"Study of biaxial mechanical properties of the passive pig heart: material characterisation and categorisation of regional differences","authors":"Fulufhelo Nemavhola","doi":"10.1186/s40712-021-00128-4","DOIUrl":"https://doi.org/10.1186/s40712-021-00128-4","url":null,"abstract":"Regional mechanics of the heart is vital in the development of accurate computational models for the pursuit of relevant therapies. Challenges related to heart dysfunctioning are the most important sources of mortality in the world. For example, myocardial infarction (MI) is the foremost killer in sub-Saharan African countries. Mechanical characterisation plays an important role in achieving accurate material behaviour. Material behaviour and constitutive modelling are essential for accurate development of computational models. The biaxial test data was utilised to generated Fung constitutive model material parameters of specific region of the pig myocardium. Also, Choi-Vito constitutive model material parameters were also determined in various myocardia regions. In most cases previously, the mechanical properties of the heart myocardium were assumed to be homogeneous. Most of the computational models developed have assumed that the all three heart regions exhibit similar mechanical properties. Hence, the main objective of this paper is to determine the mechanical material properties of healthy porcine myocardium in three regions, namely left ventricle (LV), mid-wall/interventricular septum (MDW) and right ventricle (RV). The biomechanical properties of the pig heart RV, LV and MDW were characterised using biaxial testing. The biaxial tests show the pig heart myocardium behaves non-linearly, heterogeneously and anisotropically. In this study, it was shown that RV, LV and MDW may exhibit slightly different mechanical properties. Material parameters of two selected constitutive models here may be helpful in regional tissue mechanics, especially for the understanding of various heart diseases and development of new therapies.","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"16 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2021-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-021-00128-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4776678","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: 4

Experimental investigations and empirical relationship on the influence of innovative hub geometry in a centrifugal fan for performance augmentation 创新轮毂几何形状对离心风机性能提升影响的实验研究及经验关系

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2021-03-19 DOI: 10.1186/s40712-021-00127-5

N. Madhwesh, K. Vasudeva Karanth, N. Yagnesh Sharma

{"title":"Experimental investigations and empirical relationship on the influence of innovative hub geometry in a centrifugal fan for performance augmentation","authors":"N. Madhwesh, K. Vasudeva Karanth, N. Yagnesh Sharma","doi":"10.1186/s40712-021-00127-5","DOIUrl":"https://doi.org/10.1186/s40712-021-00127-5","url":null,"abstract":"One of the problem areas of fluid flow in the turbomachine is its inlet region, manifested by flow distortions due to the induced fluid swirl accompanied by improper flow incidence onto the impeller. Further, the hub forms one of the main components of many of the turbomachines and it is found that there has not been significant study on geometrical modifications of the same in centrifugal fans for augmented performance. This is partially due to designers trying to reduce the cost of the overall machine.There is a scope for detailed parametric study and the present work involves an exploration of flow behavior by parametric variation of hub geometry in terms of both its shape and size.Experiments are carried out in order to determine the importance of hub with different size and shapes. The geometric models of hemi-spherical and ellipsoidal hubs are considered for the analyses in the present study.An optimized ellipsoidal hub configuration is found to yield a relative improvement of about 7.5% for head coefficient and 7.7% increase in relative theoretical efficiency over the hub-less base configuration. Finally, correlations are developed for the optimized hub shape configurations.It is revealed from experimental analysis that hub plays a vital role in streamlining the flow at the inlet to the centrifugal fan and augments its performance.","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"16 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2021-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-021-00127-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4758027","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

Mathematical modeling of auxetic systems: bridging the gap between analytical models and observation 辅助系统的数学建模:弥合分析模型与观测之间的差距

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2021-03-17 DOI: 10.1186/s40712-020-00125-z

James N. Grima-Cornish, Joseph N. Grima, Daphne Attard

引用次数: 4

Correction to: Memory-dependent derivative approach onmagneto-thermoelastic transversely isotropic medium with two temperatures 对两个温度的磁热弹性横各向同性介质的记忆相关导数方法的修正

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2021-02-07 DOI: 10.1186/s40712-021-00126-6

Iqbal Kaur, Parveen Lata, Kulvinder Singh

引用次数: 1

Experimental investigation on a novel approach for laser surface hardening modelling 激光表面硬化建模新方法的实验研究

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2021-01-13 DOI: 10.1186/s40712-020-00124-0

L. Orazi, A. Rota, B. Reggiani

{"title":"Experimental investigation on a novel approach for laser surface hardening modelling","authors":"L. Orazi, A. Rota, B. Reggiani","doi":"10.1186/s40712-020-00124-0","DOIUrl":"https://doi.org/10.1186/s40712-020-00124-0","url":null,"abstract":"Laser surface hardening is rapidly growing in industrial applications due to its high flexibility, accuracy, cleanness and energy efficiency. However, the experimental process optimization can be a tricky task due to the number of involved parameters, thus suggesting for alternative approaches such as reliable numerical simulations. Conventional laser hardening models compute the achieved hardness on the basis of microstructure predictions due to carbon diffusion during the process heat thermal cycle. Nevertheless, this approach is very time consuming and not allows to simulate real complex products during laser treatments. To overcome this limitation, a novel simplified approach for laser surface hardening modelling is presented and discussed. The basic assumption consists in neglecting the austenite homogenization due to the short time and the insufficient carbon diffusion during the heating phase of the process. In the present work, this assumption is experimentally verified through nano-hardness measurements on C45 carbon steel samples both laser and oven treated by means of atomic force microscopy (AFM) technique.","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"16 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2021-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-020-00124-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4533830","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

Ductile failure analysis of epoxy resin plates containing multiple circular arc cracks by means of the equivalent material concept 用等效材料概念分析含多个圆弧裂纹的环氧树脂板的延性破坏

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2021-01-02 DOI: 10.1186/s40712-020-00123-1

M. Pourseifi, A. S. Rahimi

引用次数: 1

Memory-dependent derivative approach on magneto-thermoelastic transversely isotropic medium with two temperatures 双温度磁热弹性横各向同性介质的记忆依赖导数方法

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2020-12-03 DOI: 10.1186/s40712-020-00122-2

Iqbal Kaur, Parveen Lata, Kulvinder Singh

引用次数: 16

Interfacial assessment of degraded amorphous silicon module using scanning probe microscopy 用扫描探针显微镜对降解非晶硅组件的界面评价

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2020-12-03 DOI: 10.1186/s40712-020-00121-3

E. L. Meyer, G. O. Osayemwenre

{"title":"Interfacial assessment of degraded amorphous silicon module using scanning probe microscopy","authors":"E. L. Meyer, G. O. Osayemwenre","doi":"10.1186/s40712-020-00121-3","DOIUrl":"https://doi.org/10.1186/s40712-020-00121-3","url":null,"abstract":"This is a study of the degradation of amorphous silicon solar cells. The study accessed structural defects and the mechanical stress of solar cells at nanoscale level. Interface morphology, deformation, and internal delamination of the cells were analyzed. Adequate analysis of roughness parameters was performed to investigate the state of degradation of the amorphous silicon solar modules (a-Si:H) used in this study. Roughness parametric test is necessary in thin film solar cells production process because it is used to quantify the relationship that exists between roughness parameters and electrical efficiencies of solar cells. However, in this study, a roughness analysis was not only performed to quantify the performance of the a-Si:H module but to also compliment their mechanical degradation analysis. Roughness indicators such as root means square (RMS) roughness and average roughness were acquired from line profiles. Measurements were taken with scanning probe microscope (SPM) and PeakForce Quantitative Nanomechanical (QNM) technique was used through the cross sectional area of the analyzed samples. The method was validated with adhesive force and deformation analyses; it was established that high roughness values result from mechanical degradation. Results from the roughness parameters and the mechanical degradation analysis were further observed from in situ measurements and these showed good compatibility. The benefit of this technique is that it provides a good procedure for the evaluation of mechanical degradation without destroying any part of the intrinsic layers in a-Si:H modules.","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"15 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2020-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-020-00121-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4113584","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

Study of biaxial mechanical properties of the passive pig heart: material characterisation and categorisation of regional differences 被动猪心脏双轴力学性能的研究:材料表征和区域差异的分类

IF 3.1

International Journal of Mechanical and Materials Engineering Pub Date : 2020-09-24 DOI: 10.20944/PREPRINTS202009.0589.V1

F. Nemavhola

{"title":"Study of biaxial mechanical properties of the passive pig heart: material characterisation and categorisation of regional differences","authors":"F. Nemavhola","doi":"10.20944/PREPRINTS202009.0589.V1","DOIUrl":"https://doi.org/10.20944/PREPRINTS202009.0589.V1","url":null,"abstract":"Regional mechanics of the heart is vital in the development of accurate computational models for the pursuit of relevant therapies. Challenges related to heart dysfunctioning are the most important sources of mortality in the world. For example, myocardial infarction (MI) is the foremost killer in sub-Saharan African countries. Mechanical characterisation plays an important role in achieving accurate material behaviour. Material behaviour and constitutive modelling are essential for accurate development of computational models. The biaxial test data was utilised to generated Fung constitutive model material parameters of specific region of the pig myocardium. Also, Choi-Vito constitutive model material parameters were also determined in various myocardia regions. In most cases previously, the mechanical properties of the heart myocardium were assumed to be homogeneous. Most of the computational models developed have assumed that the all three heart regions exhibit similar mechanical properties. Hence, the main objective of this paper is to determine the mechanical material properties of healthy porcine myocardium in three regions, namely left ventricle (LV), mid-wall/interventricular septum (MDW) and right ventricle (RV). The biomechanical properties of the pig heart RV, LV and MDW were characterised using biaxial testing. The biaxial tests show the pig heart myocardium behaves non-linearly, heterogeneously and anisotropically. In this study, it was shown that RV, LV and MDW may exhibit slightly different mechanical properties. Material parameters of two selected constitutive models here may be helpful in regional tissue mechanics, especially for the understanding of various heart diseases and development of new therapies.","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"15 1","pages":"1-14"},"PeriodicalIF":3.1,"publicationDate":"2020-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84997945","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: 11