International Journal of Mechanical and Materials Engineering最新文献

{"title":"Correction to: Memory-dependent derivative approach onmagneto-thermoelastic transversely isotropic medium with two temperatures","authors":"Iqbal Kaur, Parveen Lata, Kulvinder Singh","doi":"10.1186/s40712-021-00126-6","DOIUrl":"https://doi.org/10.1186/s40712-021-00126-6","url":null,"abstract":"","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"16 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2021-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-021-00126-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4616036","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}

{"title":"Experimental investigation on a novel approach for laser surface hardening modelling","authors":"L. Orazi,&nbsp;A. Rota,&nbsp;B. Reggiani","doi":"10.1186/s40712-020-00124-0","DOIUrl":"https://doi.org/10.1186/s40712-020-00124-0","url":null,"abstract":"<p>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.</p>","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}

{"title":"Ductile failure analysis of epoxy resin plates containing multiple circular arc cracks by means of the equivalent material concept","authors":"M. Pourseifi,&nbsp;A. S. Rahimi","doi":"10.1186/s40712-020-00123-1","DOIUrl":"https://doi.org/10.1186/s40712-020-00123-1","url":null,"abstract":"<p>Ductile failure of polymeric samples weakened by circular arc cracks is studied theoretically and experimentally in this research. Various arrangements of cracks with different arc angles are considered in the specimens such that crack tips experienced the mixed mode I/II loading conditions. Fracture tests are conducted on the multi-cracked specimens and their fracture loads are achieved. To provide the results, the equivalent material concept (EMC) is used in conjunction of dislocation method and a brittle fracture criterion such that there is no necessity for performing complex and time-consuming elastic-plastic damage analyses. Theoretical and experimental stress intensity factors are computed and compared with each other by employing the fracture curves which demonstrate the appropriate efficiency of proposed method to predict the tests results.</p>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"16 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-020-00123-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4428039","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}

{"title":"Memory-dependent derivative approach on magneto-thermoelastic transversely isotropic medium with two temperatures","authors":"Iqbal Kaur,&nbsp;Parveen Lata,&nbsp;Kulvinder Singh","doi":"10.1186/s40712-020-00122-2","DOIUrl":"https://doi.org/10.1186/s40712-020-00122-2","url":null,"abstract":"<p>The aim of the present investigation is to examine the memory-dependent derivatives (MDD) in 2D transversely isotropic homogeneous magneto thermoelastic medium with two temperatures. The problem is solved using Laplace transforms and Fourier transform technique. In order to estimate the nature of the displacements, stresses and temperature distributions in the physical domain, an efficient approximate numerical inverse Fourier and Laplace transform technique is adopted. The distribution of displacements, temperature and stresses in the homogeneous medium in the context of generalized thermoelasticity using LS (Lord-Shulman) theory is discussed and obtained in analytical form. The effect of memory-dependent derivatives is represented graphically.</p>","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/s40712-020-00122-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4113582","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}

{"title":"Interfacial assessment of degraded amorphous silicon module using scanning probe microscopy","authors":"E. L. Meyer,&nbsp;G. O. Osayemwenre","doi":"10.1186/s40712-020-00121-3","DOIUrl":"https://doi.org/10.1186/s40712-020-00121-3","url":null,"abstract":"<p>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.</p>","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}

{"title":"Retraction Note: Hydrothermal analysis on MHD squeezing nanofluid flow in parallel plates by analytical method","authors":"Kh. Hosseinzadeh,&nbsp;M. Alizadeh,&nbsp;D. D. Ganji","doi":"10.1186/s40712-020-00120-4","DOIUrl":"https://doi.org/10.1186/s40712-020-00120-4","url":null,"abstract":"","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"15 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-020-00120-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5067405","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}

{"title":"Investigation of mechanical properties and surface roughness of friction stir welded AA6061-T651","authors":"Rajesh Kumar Bhushan,&nbsp;Deepak Sharma","doi":"10.1186/s40712-020-00119-x","DOIUrl":"https://doi.org/10.1186/s40712-020-00119-x","url":null,"abstract":"<p>Friction stir welding (FSW) of 6-mm-thick plates of AA6061-T651 was carried out using a simple cylindrical pin tool. The impact of welding factors (rotational speed, welding speed) on tensile properties, microhardness, and surface roughness of FSW joints was investigated. Ultimate tensile strength (UTS), yield strength, and % elongation of AA6061-T651 base plate as well as FSW joints were found out using a universal testing machine (UTM). Maximum value of UTS and yield strength were achieved at rotational speed of 1400?rpm and welding speed of 20?mm/min. Minimum surface roughness was reached at rotational speeds of 1400?rpm and welding speed of 20?mm/min. Microstructural evolutions in the friction stir welded (FSWed) joint and microhardness profile were also determined. Maximum hardness of HV 120 was acquired for the stir zone (SZ). Hence, attainment of the maximum tensile strength, microhardness, and minimum surface roughness during FSW is a desired method to improve the service life and suitability of AA6061-T651.</p>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"15 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2020-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-020-00119-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4261762","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}

{"title":"Effects of tool offset, pin offset, and alloys position on maximum temperature in dissimilar FSW of AA6061 and AA5086","authors":"Amir Ghiasvand,&nbsp;Mahdi Kazemi,&nbsp;Maziar Mahdipour Jalilian,&nbsp;Hossein Ahmadi Rashid","doi":"10.1186/s40712-020-00118-y","DOIUrl":"https://doi.org/10.1186/s40712-020-00118-y","url":null,"abstract":"<p>Friction stir welding (FSW) is a solid-state welding technique, which two workpieces join by pressure and large plastic deformation near their melting points. The tool offset, pin offset, and position of dissimilar alloys can highly affect the maximum temperature and heat distribution in FSW process. In current research, the effects of three mentioned variables on the maximum temperature of FSW of AA6061 and AA5086 alloys have been investigated. In this manner, Response Surface Methodology (RSM) as an auxiliary method has been used. The results show that pin offset is the most effective parameter affecting maximum achieved temperature. In all pin and tool offsettings, placing the harder alloy (AA6061) at advancing side results in more maximum temperature increment compared to the case which the harder alloy is at the retreating side.</p>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"15 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2020-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-020-00118-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4625126","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}

{"title":"The effect of alumina powder in dielectric on electrical discharge machining parameters of aluminum composite A413-Al2O3 by the Taguchi method, the signal-to-noise analysis and the total normalized quality loss","authors":"Mojtaba Shahbazi Dastjerdi,&nbsp;Ali Mokhtarian,&nbsp;Payam Saraeian","doi":"10.1186/s40712-020-00117-z","DOIUrl":"https://doi.org/10.1186/s40712-020-00117-z","url":null,"abstract":"<p>The machining capability of metal composites is different compared to other materials because of their specific physical and mechanical properties. The aluminum composite A413 reinforced with Alumina powder is one of the materials which causes rapid erosion of the tool if traditional machining methods are employed. In this research, the electrical discharge machining experiments were conducted using the Taguchi method. After analysis of variance (ANOVA) using simultaneous analysis of total normalized quality loss (TNQL), and signal-to-noise ratio (S/N) of outputs, the effect of each parameter such as current intensity, voltage, pulse on-time and pulse off-time have been investigated. These parameters are influential on material removal rates, surface roughness, and tool wear ratio of electric discharge machining in two cases of with alumina powder and without alumina powder in dielectric. The outcomes of this research indicate that the use of Alumina powder 3?g/L in kerosene dielectric averagely reduces the material removal rate by 7.8%, increases the surface roughness by 8.8%, and decreases the tool wear ratio by 1.3%. Also, the results of analysis of total normalized quality loss and signal-to-noise ratio of the experiment have been shown as the first level of voltage (<i>A</i>₁), the first level of current intensity (<i>B</i>₁), the first level of pulse on time (<i>C</i>₁), and the third level of pulse off time (<i>D</i>₃).</p>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"15 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2020-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-020-00117-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4107650","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}

{"title":"Experimentation and numerical modeling on the response of woven glass/epoxy composite plate under blast impact loading","authors":"Kasmidi Gunaryo,&nbsp;Heri Heriana,&nbsp;M. Rafiqi Sitompul,&nbsp;Andi Kuswoyo,&nbsp;Bambang K. Hadi","doi":"10.1186/s40712-020-0116-3","DOIUrl":"https://doi.org/10.1186/s40712-020-0116-3","url":null,"abstract":"<p>Composite material is being used in vehicles for protective structures against blast loading. Limited data is available which compare experimental works and numerical analysis in the open field environment. More data is needed in this area in order to be able to predict and use composite materials safely.</p><p>In this work, the response of woven glass/epoxy composite plates under blast loading was investigated, both experimentally and numerically. The plate was manufactured using glass/epoxy woven Cytec 120?°C curing system. The explosive material was Tri-Nitro-Toluen (TNT) with different masses, which are 60, 80, and 100?g. The stand-off distance was also varied, ranging from 300 up to 1000 mm. In the experimental work, a sewing needle pin was put under the plate to record the maximum deformation of the plate during TNT explosion. In the numerical analysis, LS-DYNA was used extensively. The composite plate was modeled as shell elements using MAT54, and the failure criteria was Chang-Chang failure criteria. The explosive TNT material was modeled in two different ways. First, it was modeled using CONWEP and the second was modeled using Smooth Particle Hydrodynamics (SPH). The numerical analysis results were then compared with the experimental data for the case of maximum deformation.</p><p>Experimentally, the sewing needle method was able to measure the plate maximum deformation during the explosion. The numerical analysis showed that the SPH model gave better agreement with experimental results compared with CONWEP method. The SPH results were in the range of 8–18% compared to experimental data, while the CONWEP results were in the range of 14–43%.</p><p>Albeit its simplicity, sewing needle method was able to measure the maximum deformation for blast loading experimentation. The SPH model was better compared with CONWEP method in analyzing the response of composite plate subjected to blast loading.</p>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"15 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2020-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40712-020-0116-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4415247","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}