Archive of Applied Mechanics最新文献_第5页

Stability analysis of porous FG sandwich plates under thermomechanical loads via integral HySDT 通过积分 HySDT 分析多孔 FG 夹层板在热机械载荷下的稳定性

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-31 DOI: 10.1007/s00419-024-02665-8

Imene Laoufi, Amina Attia, Fouad Bourada, Abdelouahed Tounsi, Abdeldjebbar Tounsi, Khaled Mohamed Khedher, Mohamed Abdelaziz Salem, Murat Yaylacı

{"title":"Stability analysis of porous FG sandwich plates under thermomechanical loads via integral HySDT","authors":"Imene Laoufi, Amina Attia, Fouad Bourada, Abdelouahed Tounsi, Abdeldjebbar Tounsi, Khaled Mohamed Khedher, Mohamed Abdelaziz Salem, Murat Yaylacı","doi":"10.1007/s00419-024-02665-8","DOIUrl":"10.1007/s00419-024-02665-8","url":null,"abstract":"<div><p>The thermomechanical buckling of imperfect sandwich plates made of functionally graded material (FGM) is addressed analytically in this study. A novel hyperbolic four-variable integral shear deformation theory is used to arrive at the solution. Sandwich plates come in two varieties: the first with homogeneous core and FG face sheets and the second with the opposite. The displacement field is constructed using undetermined integrals in order to reduce the number of unknown variables which consequently reduces the calculation time unlike other similar theories. The proposed model does not require a shear correction factor and ensures the free-stress at the upper and lower surfaces of structure. The materials properties of the structure are computed via power-law function with considering the porosity effect which may appear during manufacturing due to the difference in solidification temperature of the constituents (ceramic/metal). Four types of geometric imperfection are examined with even, uneven, logarithmic uneven and linear uneven distributions. On the basis of the minimal total potential energy concept, the governing equations are developed. The Navier’s method is used to solve these equations for simply supported plates. The results of simply supported FGM sandwich plates' critical buckling load and temperature increment are contrasted with the available solutions in the literature. Even, uneven, linear uneven and logarithmic uneven models of distribution are taken into consideration and studied in order to incorporate porosity in the FG face sheet and core. Investigation is conducted into the effects of layer thickness, porosity models, porosity coefficients and geometrical parameters on the thermomechanical buckling response of imperfect FG sandwich plates.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 11","pages":"3175 - 3194"},"PeriodicalIF":2.2,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Buckling analysis of medical guidewires based on the modified couple stress theory 基于修正耦合应力理论的医用导丝屈曲分析

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-29 DOI: 10.1007/s00419-024-02670-x

Narges Abdolifard, Abbas Rahi, Morteza Shahravi, Behzad Heidarpour

{"title":"Buckling analysis of medical guidewires based on the modified couple stress theory","authors":"Narges Abdolifard, Abbas Rahi, Morteza Shahravi, Behzad Heidarpour","doi":"10.1007/s00419-024-02670-x","DOIUrl":"10.1007/s00419-024-02670-x","url":null,"abstract":"<div><p>This paper investigates the behavior of a medical guidewire within a vessel with a specific focus on its buckling, commonly known as tip load. The guidewire is simulated as a variable section microshaft embedded in an elastic environment, and a comprehensive buckling analysis is carried out based on the modified couple stress theory (MCST). The fundamental frequency is determined by applying Hamilton’s principle and Rayleigh’s method. A formula for calculating the buckling force is subsequently introduced. Numerical simulations were conducted to analyze the impact of the material properties, tapered tip length, core thickness, slenderness ratio, and material length scale parameter on the tip load and penetration force. Furthermore, a comparative study was carried out to validate the proposed formulation. The findings derived from this research can provide valuable insights for the optimization and exploration of various parameters related to medical guidewires. The findings indicate that coronary guidewires with lengths exceeding 10 cm exhibit minimal variations in tip load, whereas those with lengths below this threshold experience a substantial decrease of 65–75% in both tip load and penetration force when the length is doubled. In addition, nitinol guidewires demonstrate greater flexibility, with their tip load being nearly 75% lower than that of stainless steel guidewires of equivalent dimensions. Moreover, there is a notable increase in penetration force with an expanding radius, with tapered tips resulting in an approximate 20–30% increase in penetration force.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 11","pages":"3325 - 3338"},"PeriodicalIF":2.2,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141870099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An investigation of the thermomechanical effects of mode-I crack under modified Green–Lindsay theory 修正格林-林赛理论下 I 型裂纹的热力学效应研究

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-28 DOI: 10.1007/s00419-024-02662-x

Pravin Kumar, Rajesh Prasad

引用次数: 0

A comparative study on the identification methods for calibration of the orthotropic yield surface and its effect on the sheet metal forming simulations 校准正交屈服面的识别方法及其对金属板材成型模拟影响的比较研究

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-26 DOI: 10.1007/s00419-024-02657-8

Bora Sener

{"title":"A comparative study on the identification methods for calibration of the orthotropic yield surface and its effect on the sheet metal forming simulations","authors":"Bora Sener","doi":"10.1007/s00419-024-02657-8","DOIUrl":"10.1007/s00419-024-02657-8","url":null,"abstract":"<div><p>The predictive capability of an anisotropic yield function highly relies upon the number of the model parameters and its calibration type. Conventional calibration of a plane stress anisotropic yield function considers material behavior in uniaxial and equi-biaxial stress states, whereas it violates shear and plane strain loading conditions. In this study, the direction of the plastic flow in both loading regions was corrected by including shear and plane strain constraint terms to the conventional calibration of the Yld2000 function, and its effect on the sheet metal forming simulations, namely cup drawing and hole expansion tests, was investigated. Two highly anisotropic sheet materials (AA2090-T3 and low-carbon steel) were selected for the investigation, and the anisotropy coefficients were determined. Stress anisotropy was accurately predicted by the conventional method, whereas any decrease in the prediction of the deformation anisotropy could not occur by the applying of the constrained methods. Significant increases in the predicted cup height and differences in the number of the ears were observed by shear constraint identification in the cup drawing. The maximum thinning location in the hole expansion test could be accurately predicted by plane strain constraint identification.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"3049 - 3069"},"PeriodicalIF":2.2,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00419-024-02657-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and solution of eigenvalue problems of laminated cylindrical shells consisting of nanocomposite plies in thermal environments 热环境下纳米复合材料层叠圆柱壳的建模和特征值问题求解

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-23 DOI: 10.1007/s00419-024-02658-7

Abdullah H. Sofiyev

{"title":"Modeling and solution of eigenvalue problems of laminated cylindrical shells consisting of nanocomposite plies in thermal environments","authors":"Abdullah H. Sofiyev","doi":"10.1007/s00419-024-02658-7","DOIUrl":"10.1007/s00419-024-02658-7","url":null,"abstract":"<div><p>This work is dedicated to the modeling and solution of eigenvalue problems within shear deformation theory (SDT) of laminated cylindrical shells containing nanocomposite plies subjected to axial compressive load in thermal environments. In this study, the shear deformation theory for homogeneous laminated shells is extended to laminated shells consisting of functionally graded (FG) nanocomposite layers. The nanocomposite plies of laminated cylindrical shells (LCSs) are arranged in a piecewise FG distribution along the thickness direction. Temperature-dependent material properties of FG-nanocomposite plies are estimated through a micromechanical model, and CNT efficiency parameters are calibrated based on polymer material properties obtained from molecular dynamics simulations. After mathematical modeling, second-order time-dependent and fourth-order coordinate-dependent partial differential equations are derived within SDT, and a closed-form solution for the dimensionless frequency parameter and critical axial load is obtained for first time. After the accuracy of the applied methodology is confirmed by numerical comparisons, the unique influences of ply models, the number and sequence of plies and the temperature on the critical axial load and vibration frequency parameter within SDT and Kirchhoff–Love theory (KLT) are presented with numerical examples.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"3071 - 3099"},"PeriodicalIF":2.2,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00419-024-02658-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of thermal uncertainty on piezoelectric control of doubly curved bimorph shell: acoustic characteristics 热不确定性对双曲双晶壳压电控制的影响：声学特性

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-23 DOI: 10.1007/s00419-024-02653-y

N. Moustafa, R. Talebitooti, K. Daneshjou

{"title":"Effect of thermal uncertainty on piezoelectric control of doubly curved bimorph shell: acoustic characteristics","authors":"N. Moustafa, R. Talebitooti, K. Daneshjou","doi":"10.1007/s00419-024-02653-y","DOIUrl":"10.1007/s00419-024-02653-y","url":null,"abstract":"<div><p>In this work, the sound transmission loss (STL) of a simply supported doubly curved shallow aluminum shell covered by two layers of piezoelectric material, PZT-5H is presented. The study takes into account the presence of uncertain ambient temperature which is shown to significantly affect piezoelectric control of sound transmission. To derive the equations of motion, the assumed mode method combined with the first-order shear deformation theory and Hamilton's principles are employed. The modeling process incorporates the ambient temperature and thoroughly investigates its effects on STL, vibrational displacement, and piezoelectric voltage in terms of thermal strain, piezoelectric constants, and the pyroelectric coefficient uncertainties. Results show that uncertainty in environmental temperature significantly affects STL uncertainty up to 10% and vibrational displacement of the shell to the 15 times of its lowest value. The piezoelectric voltage also fluctuates with the variation in the temperature in a maximum range of 0.12–5.2 Volt. Further, the piezoelectric sensing voltage which accounts for the piezoelectric sensor thickness is observed to be highly sensitive to the temperature uncertainty with a maximum range of 0.65–7.6 Volt, causing depolarization and hysteresis nonlinearity. Thus, environmental temperature variation is considered as one of the main uncertain aspects for robust sound transmission controller. The proposed study provides an insightful investigation for robust piezoelectric control of STL in the presence of thermal uncertainty.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"2967 - 2987"},"PeriodicalIF":2.2,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel results in vibration analysis of nonlinear laminated composite beams (LCBs) 非线性层状复合梁（LCB）振动分析的新成果

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-22 DOI: 10.1007/s00419-024-02650-1

M. Bayat, Mas. Bayat, L. Cveticanin

{"title":"Novel results in vibration analysis of nonlinear laminated composite beams (LCBs)","authors":"M. Bayat, Mas. Bayat, L. Cveticanin","doi":"10.1007/s00419-024-02650-1","DOIUrl":"10.1007/s00419-024-02650-1","url":null,"abstract":"<div><p>This study investigates vibrations of the laminated composite beam (LCB) subjected to axial load and settled on Winkler–Pasternak elastic foundation. The beam model is of Euler–Bernoulli type with cubic order nonlinear elastic load. Two different boundary conditions are considered: (i) Simply Supported (S–S) and (ii) Clamped–Clamped (C–C) ones. Mathematical model of the asymmetric LCB is a partial differential equation. Applying Galerkin procedure, the model is converted into a strong nonlinear ordinary equation. In the paper, the new analytical method, dubbed as the Max–Min Approach (MMA), is adopted to provide more accurate nonlinear analysis of beams. The analytical solution is inferred to investigate the effects of axial force and essential elasticity parameters of foundation on the nonlinear response of the beams. Analytical results are compared with numerical solutions and show good agreement. In addition, the results are compared with previously published ones. It is concluded that MMA used in LCB gives more accurate results than the previously used analytic methods and is practical applicable. The method can be easily extended to high nonlinear vibration problems in LCB under different boundary conditions.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"2909 - 2920"},"PeriodicalIF":2.2,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Minimal model identification of drum brake squeal via SINDy 通过 SINDy 识别鼓式制动器异响的最小模型

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-22 DOI: 10.1007/s00419-024-02659-6

Paul Wulff, Nils Gräbner, Utz von Wagner

{"title":"Minimal model identification of drum brake squeal via SINDy","authors":"Paul Wulff, Nils Gräbner, Utz von Wagner","doi":"10.1007/s00419-024-02659-6","DOIUrl":"10.1007/s00419-024-02659-6","url":null,"abstract":"<div><p>The industrial standard in the design and development process of <i>NVH</i> <i>(Noise Vibration Harshness)</i> characteristic of brakes is the application of <i>Finite Element</i> <i>(FE)</i> models with a high number of degrees of freedom in the range of one or several millions. Nevertheless, parallel experimental investigations are still indispensable. On the other hand, minimal models with, due to the inclusion of the self-excitation process, at least two degrees of freedom are well known to be capable to explain qualitatively phenomena as instability of the desired non-vibrating solution or limit cycle oscillation but are in general very inaccurate in predicting the dynamics of a specific real brake. This is because the underlying physical assumptions are already too restrictive and model parameters (especially those referring to nonlinearities) are widely unknown. To overcome this problem, the data-driven modeling approach <i>SINDy</i> <i>(Sparse Identification of Nonlinear Dynamics)</i> is applied to identify appropriate nonlinear functions for a brake squeal minimal model. A problem thereby is the limited database. It turns out that the naive implementation of the method yielding the lowest possible residuum does not necessarily provide physically meaningful models and results, respectively. Instead, a constrained model that incorporates physical knowledge is used to robustly identify parameters and reproduce realistic dynamic behavior. Thereby, several appropriate models with coexisting limit cycles and stationary equilibrium are identified. In particular, it was found that the angular position of the brake drum has a significant influence on the model parameters and therefore must be taken into account in a model with long-term validity.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 10","pages":"3101 - 3117"},"PeriodicalIF":2.2,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00419-024-02659-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141773198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Peridynamic computations of wave propagation and reflection at material interfaces 波在材料界面传播和反射的周动力计算

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-22 DOI: 10.1007/s00419-024-02646-x

Kai Partmann, Manuel Dienst, Kerstin Weinberg

引用次数: 0

Simple diagnosis for layered structure using convolutional neural networks 利用卷积神经网络对分层结构进行简单诊断

IF 2.2 3区工程技术

Archive of Applied Mechanics Pub Date : 2024-07-21 DOI: 10.1007/s00419-024-02661-y

Daiki Tajiri, Tatsuru Hioki, Shozo Kawamura, Masami Matsubara

{"title":"Simple diagnosis for layered structure using convolutional neural networks","authors":"Daiki Tajiri, Tatsuru Hioki, Shozo Kawamura, Masami Matsubara","doi":"10.1007/s00419-024-02661-y","DOIUrl":"10.1007/s00419-024-02661-y","url":null,"abstract":"<div><p>In this study, we propose a structural health monitoring and diagnostic method for layered (multi-story) structures using a convolutional neural network (CNN). The proposed method is a primary diagnostic one, and its purpose is to allow quick identification of the location of an abnormality after detecting it. An abnormality is defined as a decrease in the stiffness characteristics (spring constant) of the outer wall of a multi-story structure when it deteriorates or is damaged. The proposed method has the following features. A modal circle is generated by multiplying the frequency response functions (FRFs) simulated by a mathematical model and the FRFs from the actual structure, in frequency space, and then a CNN learns the features of the abnormality from the modal circle and diagnoses it in the actual multi-story structure. We first verified the validity of the proposed method by considering a three-story structure as a numerical example. When the method was applied to three types of abnormal conditions, it was shown that the abnormal diagnosis could be performed correctly. Next, we constructed an experimental model of a three-story structure, and realized three types of abnormal conditions similar to those in the numerical model. We verified the applicability of the proposed method and showed that correct diagnosis of an abnormality was possible. Both the validity and applicability of the proposed method were thus confirmed.</p></div>","PeriodicalId":477,"journal":{"name":"Archive of Applied Mechanics","volume":"94 11","pages":"3135 - 3155"},"PeriodicalIF":2.2,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00419-024-02661-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141737472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0