15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII)最新文献_第3页

Spherulite Microstructure Formation Simulation Based on Effect of Molding Conditions on Polylactic Acid 基于成型条件对聚乳酸影响的球晶微观结构形成模拟

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.107

H. Liqin, K. Tatsuno, Y. Aoyagi

引用次数: 0

Effective range of integrated fluidic actuators in structural elements 集成流体执行器在结构元件中的有效范围

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.046

M. Bosch, M. Nitzlader, T. Burghardt, M. Bachmann, H. Binz, L. Blandini, M. Kreimeyer

{"title":"Effective range of integrated fluidic actuators in structural elements","authors":"M. Bosch, M. Nitzlader, T. Burghardt, M. Bachmann, H. Binz, L. Blandini, M. Kreimeyer","doi":"10.23967/wccm-apcom.2022.046","DOIUrl":"https://doi.org/10.23967/wccm-apcom.2022.046","url":null,"abstract":". High demand for living and working space as well as the corresponding infrastructure, caused by a growing population and increasing prosperity worldwide, leads to increased consumption of mineral resources. This is accompanied by high usage of grey energy and a high output of greenhouse gas emissions. Adaptive structures represent a promising approach for mass and resource savings. Through the interaction of actuators, sensors and control units, the structure can adapt to the external loads to reduce stresses and deformations. As a result, the building material required can be reduced. For actuators integrated into slabs, new challenges arise due to the multi-axial load transfer. In particular, the aim is to achieve the largest possible effective range of the applied moment to reduce the number of actuators required. One approach is to optimize the geometry of the force-introducing surfaces inside the structural element. This paper presents a study about the correlations of the geometric parameters using numerical simulations. This enables the pre-dimensioning of the actuator and is thus a first step in its design.","PeriodicalId":429847,"journal":{"name":"15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126437765","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

Analysis of Combat Helmet Performance Integrating Blast Loading and Blunt Impact through Simulation 综合爆炸载荷和钝器冲击的作战头盔性能仿真分析

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.020

G. Tan, A. Bagchi

{"title":"Analysis of Combat Helmet Performance Integrating Blast Loading and Blunt Impact through Simulation","authors":"G. Tan, A. Bagchi","doi":"10.23967/wccm-apcom.2022.020","DOIUrl":"https://doi.org/10.23967/wccm-apcom.2022.020","url":null,"abstract":". The mild traumatic brain injury (mTBI) is one of the most common injuries to service members in recent conflicts. Combat helmets have been designed and evaluated to perform against ballistic and blunt impact threats, but not blast threats. An optimal design of combat helmet considering blunt, ballistic impacts and blast effects is a key requirement to improve the head protection against mTBI. Combat helmets are usually designed based on costly and time consuming laboratory tests. Computational models can offer insights in understanding the force transmission through the head-helmet system into the brain and underlying mechanism of brain injury, and help the development of effective protective design. We developed a design approach integrating the effect of both blast and blunt threats to a helmet system by utilizing multi-physics computational tools and representative human head and helmet models. The high-fidelity computational models were used to capture the dynamic response of the composite shell, suspension pads, retention straps and head. Multiple helmet system configurations subjected to blast and blunt loadings with a combination of loading magnitude and orientation were considered to quantify their influence on brain biomechanical response. Parametric studies were carried out to assess energy absorption for different suspension geometry and material morphology for different loadings. The resulting brain responses in terms of pressure, stress, strain, and strain rate as well as the head acceleration were used with published injury criteria to characterize the helmet system performance through a single metric for each threat type. Approaches to combine single-threat metrics to allow aggregating performance against multiple threats were discussed.","PeriodicalId":429847,"journal":{"name":"15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123021697","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 Evaluation of Bell-Shaped Proportional Damping Model for Softening Structures 软化结构钟形比例阻尼模型的数值评价

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.083

C. Lee, T. Chang

引用次数: 2

The non-smooth tale of Accumoli civic tower 阿库莫利市政大厦的不顺利故事

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.113

M. Schiavoni, E. Giordano, F. Clementi

引用次数: 0

An Alternative Approach for Inelastic Static Isogeometric Analysis and 3D Design with Advanced Spline Techniques with Geomiso TNL: a New Hybrid Cloud-based CAD/CAE Software 基于Geomiso TNL的高级样条技术的非弹性静力等几何分析和三维设计的替代方法:一种新的基于云的混合CAD/CAE软件

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.017

P. Karakitsios, P. Kolios, A. Leontaris, G. Karaiskos

引用次数: 0

Bayesian Model updating of Linear dynamic systems using complex modal data 基于复杂模态数据的线性动态系统贝叶斯模型更新

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.023

E. Henikish, S. Bansal, R. Kiran

{"title":"Bayesian Model updating of Linear dynamic systems using complex modal data","authors":"E. Henikish, S. Bansal, R. Kiran","doi":"10.23967/wccm-apcom.2022.023","DOIUrl":"https://doi.org/10.23967/wccm-apcom.2022.023","url":null,"abstract":": In the lifetime of structures, they may be exposed to damage that deviates their parameters to a new uncertain state. To predict these parameters, they must be updated using experimental data through various model updating methods. Among model updating methods, the Bayesian approach enables the exploration of all the probable models. Many approaches are available, like those that require the solution of the eigenvalue problem and those that do not require the resolution of the eigenvalue problem. Most existing studies have assumed proportional damping, which gives real modal data, which is not the case always. In this paper, a new Bayesian model updating methodology is proposed based on introducing system mode shapes, damping ratios and natural frequencies as additional uncertain parameters. A dynamic condensation technique is used to restrain the model updating problem to work on the observed degrees of freedom (DOF) field only. To decrease the number of uncertain parameters, system mode shapes are integrated out, and Transitional Monte Carlo Markov Chain (TMCMC) is used to sample from the posterior probability density function. The proposed approach has been applied to the 3-storey shear building model. Results show that the proposed methodology can predict the updated structural parameters in many cases, like the cases where the number of observed modes is greater than the number of observed DOF and if the observed modes are not the lowest-frequency modes.","PeriodicalId":429847,"journal":{"name":"15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122394617","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

Modelling and validation of Selective Laser sintering of PA12 PA12选择性激光烧结的建模与验证

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.071

K. Meinert, M. Bayat, J. Hattel, D. Pedersen

引用次数: 0

Time-domain Sound Field Analysis Using the Finite Element Method and the Fast Multipole Boundary Element Method 时域声场分析的有限元法和快速多极边界元法

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.116

K. Fukazawa, H. Yoshikawa, K. Kashiyama

引用次数: 0

Modelling landslide debris flow with entrainment: development and validation 带夹带的滑坡泥石流模型:发展与验证

15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII) Pub Date : 1900-01-01 DOI: 10.23967/wccm-apcom.2022.072

I. Li, E. Wong, E. Sze

{"title":"Modelling landslide debris flow with entrainment: development and validation","authors":"I. Li, E. Wong, E. Sze","doi":"10.23967/wccm-apcom.2022.072","DOIUrl":"https://doi.org/10.23967/wccm-apcom.2022.072","url":null,"abstract":". The volume and mobility of a debris flow could increase with distance travelled as it has the potential to entrain a substantial amount of channel-bed material along its travel path. This entrainment effect renders the debris flow more devastating to downslope populations and facilities. Over the past two decades, the Geotechnical Engineering Office (GEO) of Hong Kong has expended considerable effort to develop debris mobility modelling tools for use in routine engineering practice for forward prediction purposes. Recently, GEO has completed a study to enhance an in-house debris mobility code. Physical parameters which can be estimated from the field by engineers or geologists are incorporated in the code to predict entrainment effects in a simple and rational manner. This allows the modelling of varying entrainment potential along a debris flow path. The code has been checked against simplified analytical solutions and validated against field observations in a major historical landslide event involving high-mobility debris flows in Hong Kong. The numerical modelling results indicated that simulated entrainment volume and mobility characteristics are broadly consistent with geological field mapping records.","PeriodicalId":429847,"journal":{"name":"15th World Congress on Computational Mechanics (WCCM-XV) and 8th Asian Pacific Congress on Computational Mechanics (APCOM-VIII)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116097361","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