Woven Model Research Articles

Highly Sensitive Weaving Sensor of Hybrid Graphene Nanoribbons and Carbon Nanotubes for Enhanced Pressure Sensing Function.

Carbon nanotubes (CNTs) hold great promise in next-generation sensors because of their remarkable physical properties. Yet, maintaining precise stacking configurations of CNTs to make full use of their remarkable properties is challenging because of their susceptibility to spontaneous reconstruction. Inspired by the weaving technology, we propose a CNT-graphene nanoribbon hybrid woven model that can maintain the specific structure of CNTs to achieve their elaborately designed function. In this study, comprehensive molecular dynamics simulations are carried out to investigate the thermal stability of the CNT-graphene hybrid woven model, as well as their potential for pressure sensing applications by utilizing the unique response of thermal transport to mechanical deformation at heterojunctions. The thermal stability is sensitive to the size of the graphene nanoribbon, and the woven structure remains stable from 200-500 K when its width is greater than 2.0 nm. Moreover, it is exciting that the sensors are effective at predicting the shapes of externally loaded objects through the analysis of the thermal conductivity distribution, which can be derived from the relationship between the thermal conduction and the pressure. Our findings shed light on the bottom-up functional design of nanomaterials and expand wider applications of high-performance nanosensors in other related fields.

Establishment and simplification of micromechanical material model for viscoelastic woven fabric/hybrid composite

Establishment and simplification of micromechanical material model for viscoelastic woven fabric/hybrid composite

Model of yarn-level visualization of historical fabrics based on the use of levels of detail in Sphere Tracing

The visualization of fabrics at microscopic level involves a significant computational cost due to the large number of 3d elements required to display each yarn. Often, these visualizations rely on offline systems that display the final result only after an extended rendering time, which does not allow real-time interaction or visualization. While other models can allow for real-time rendering, they may require high memory usage and preprocessing times. Moreover, threads with metallic wraps used in historical fabrics cannot be represented using existing yarn models. In this paper, we present a yarn-level weaving model based on Sphere Tracing, which enables real-time rendering of historical Jacquard weaves with diverse weft types. The primary goal of this visualization is to analyze and reconstruct weaving structures constructed using these looms to safeguard this valuable cultural heritage. Furthermore, we propose a new level of detail technique, which extends the fundamental Sphere Tracing algorithm. This approach enables the visualization of a complete fabric at varying scales while requiring low memory usage and short preprocessing times.

Pengaruh model anyaman serat kulit pohon waru (Hibiscus Tiliceus) terhadap kekuatan tarik komposit

Waru tree bark fiber (hibiscus tiliceus) has potential as a natural fiber composite reinforcement, but further research is needed by focusing on the woven fiber model on the strength of the waru tree bark composite material. The problem to be studied is "The Effect of the Model of Waru (hibiscus tiliceus) Bark Fiber Weaving on the Tensile Strength of Composites". The specific objective of this study was to analyze the effect of the woven model of hibiscus tree bark (hibiscus tiliceus) on the tensile strength of the composite in terms of ultimate strength, strain, and modulus of elasticity. The urgency of this research is that the composite of hibiscus bark fiber without woven has a tensile load concentration that is very difficult to predict, so it is necessary to have a model of woven hibiscus bark fiber. The method used in this study is an experimental method. The composite molding process uses the vaccum infusion resin method with a variety of woven models, including: Plain 1-1, Twill 2-1, Satin 3-1, Basket 2-2. The matrix used is Bisphenol A LP-1Q resin and the reinforcement used is hibiscus tiliaceus bark fiber. The analysis carried out in this study, among others: Analysis of composite tensile strength and composite fracture analysis. The type of woven fiber affects the tensile strength of the composite. Therefore, it can be recommended that waru tree bark fiber is more suitable when using basket woven model fiber (2-2) than using unidirectional fiber model.

Modeling and verification of authentication threats mitigation in aspect-oriented mal sequence woven model.

The modeling of security threats is equally important as the modeling of functional requirements at the design stage of software engineering. However, unlike functional requirements modeling, the modeling of security threats is neglected, which consequently introduces software defects during the early stages of software engineering. Hence, there is a need to mitigate these threats at the design stage. Security threats, specifically authentication threats, crosscut other functional and non-functional requirements when modeled using the object-oriented paradigm. This not only makes the design complex but also results in tangling and scattering problems. We therefore model authentication threats using the aspect-oriented modeling (AOM) technique since it separates crosscutting concerns and localizes them as separate units called aspects. Our main research aim is to remove scattering and tangling in security threats modeling using all the core features of the aspect-oriented technique. In this paper, we propose a research approach to model security threats and their mitigation in mal sequence diagram. Using this approach, our contribution makes a clear difference from previous work. Our first contribution is the modeling of authentication threats in the mal sequence diagram using the security profile and AOM profile. Our second contribution is the mathematical verification of the aspect-oriented mal sequence woven model in terms of correctness and completeness. Using the proposed approach, the scattering and tangling from the resultant woven model are successfully removed at the design stage. Thus, the complexity of models and the time and effort required for future modifications of design models are reduced.

Product Quality Control Analysis with Statistical Process Control (SPC) Method in Weaving Section (Case Study PT.I)

Abstract - PT.I is a company that produces synthetic rattan furniture on an export scale. The various products at PT.I are an attraction for consumers, such as classic and modern weaving models. However, the number of defects produced is higher than the tolerance limit company. Based on data from the weaving section, it shows that there are 5 types of defects that are not in accordance with the standards and quality that have been determined by the company. The purpose of this study is to identify the types of defects that often occur in PT. I and identify the main factors causing product defects using the SPC method. The seven tools consist of a check sheet, histogram, stratification, scatter diagram, p control chart, Pareto diagram, and fishbone diagram. The results showed that the number of defects in October and November exceeded the limit set by the company. The highest level of disability occurred in October. The higher the number of production, the higher the number of product defects. Based on the results of the p control chart, it can be seen that the product is outside the control limits that it should have. The process is in a state of uncontrollability or is still experiencing deviations. To suppress or reduce the number of product defects that occur in production, 3 types of dominant defects can be applied, namely the woven model (254 units), loose woven (122 units), and nail-looking woven (119 units). Factors causing defects in production are derived from human factors/workers, methods, materials/raw materials and work environment.

An improved orthotropic elasto-plastic damage model for plain woven composites

A ply based non-linear material constitutive model for plain woven (PW) composite, with provision to decouple the effect of plasticity and progressive damage as observed in experiments, is proposed. Mechanical characterization of basalt plain woven (BPW) is performed to evaluate the elastic moduli and strengths, intralaminar and interlaminar fracture energies whereas non-linear behavior was obtained via off-axis tests and Iosipescu test which are not available in literature yet. The single parameter plasticity potential function of Sun and Chen (1989) is modified in terms of effective stress and relation between effective flow stress and equivalent strain is determined from cyclic tests. The separation of plasticity and damage in writing the latter relation is often ignored by researchers in absence of cyclic loading experimental data. The material properties obtained were used as an input for VUMAT sub-routine which was implemented in ABAQUS to simulate the low velocity impact (LVI) phenomenon at three different impact energies and was able to successfully predict force, deflection and absorbed energy response. The accurate prediction of indentation depth and diameter leads to better understand the behavior of the indent region which is formed due to the major contribution of out of plane plastic strains and damage modes.

Prediction of the Thermo-Mechanical Properties of the SiCf/SiC RVE Model via FEM and Asymptotic Homogenization Method: Process and Implementation Details

The study focuses on characterizing the thermo-mechanical properties of SiCf/SiC using micromechanics finite element method (FEM) and multi-scale thermal–mechanical coupling asymptotic homogenization methods. A multi-scale model of fiber, fiber bundle and 2D woven SiCf/SiC has been established, while the predicted properties of the model are verified with the relevant experiments. The detailed steps to realize the micromechanical FEM are discussed, and the improvement methods have been put forward. To provide an optimal process of the micromechanical FEM based on the general software, different boundary and post-processing conditions are used and compared. Based on the traditional homogenization theory, the multi-scale thermal–mechanical coupling asymptotic homogenization method has also been developed to predict the thermo-mechanical properties of the RVE model with introduced realization. To verify the theoretical method, the properties of the 2D woven SiCf/SiC were predicted using micromechanics FEM and multi-scale thermal–mechanical coupling method, and the experimental analysis was carried out to compare with the predict results. The two methods exhibit errors in predicting the inter-layer directional performance, while the performance in other directions varies only slightly. The error between the most of the predicted values and experimental measurements is approximately 11%.

Composite Self-healing U-shaped Canal Material and Fabrication Based on Computer 3D Modeling Technology

Attributing to multiple advantages such as lightweight and excellent impact resistance, plain-woven composite self-healing U-shaped canal material has been extensively applied in various fields. As it is used as the main bearing part, the existence of cracks can significantly reduce the service performance and safety factor of the material. During the usage, the internal cracks continue to expand and accelerate the material failure. In this paper, the features of four-step weaving technology are analyzed, and the yarn trajectory is simulated by the relevant computer software based on the simulation characteristics. The computer graphics technology is used to present the 3D weaving structure. The design and implementation process of composite self-healing U-shaped canal material based on the 3D modeling technology is simulated by the computer. Based on the relationship of the weaving process parameters, simulation parameters are set in the computer software to facilitate the generation of 3D weaving models for various sizes and simulation corners. This computer simulation method allows the model to approach the real structure of woven fabric infinitely, which has implemented the characterization for the damage evolution of plain woven glass fiber composite self-healing U-shaped canal material in the in-situ shear test. The geometric information of the yarn section is obtained by scanning the image, including the long and short axis in the elliptical section of the yarn and the yarn path. Spatial positioning is performed on the defects to obtain the material defect rate by statistical analysis of its volume fraction. Statistics on the geometric parameters of the yarn are performed to establish a finite element model. Given the impact of hole defects, the finite element model with defects is established. The corresponding numerical simulation of the shear test is conducted, and the impact of defects on material failure is analyzed and revealed from the aspects of modulus, strength and damage.

LEGAL PROTECTION OF LURIK ART CONSERVATION THROUGH INTELLECTUAL PROPERTY RIGHTS 2 IN KLATEN REGENCYLEGAL PROTECTION OF LURIK ART CONSERVATION THROUGH INTELLECTUAL PROPERTY RIGHTS 2 IN KLATEN REGENCY

This article aimed to analyze legal protection of Lurik Art Conservation Through <br />Intellectual Property Rights in Klaten Regency. Klaten is the area that is most<br />concerned with the survival of lurik weaving. There is someone mentioned that the<br />Klaten Regency was the capital of lurik weaving. Because the weaving of Looms<br />are not machines or Alat Tenun Bukan Mesin (hereinafter abbreviated to ATBM) <br />is a mainstay of this city. There are countless villages that become centers of lurik <br />craftsmen. This research is empirical or non-doctrinal research, which is a study<br />that sees the law not only from the perspective of legislation, but also sees the law<br />in its implementation. The results of the study show that the first legal protection in<br />preserving the current lurik art in Klaten, namely the Klaten Regency Government,<br />then stipulates the Regent's Regulation Number 53 of 2010 Article 23 Paragraph (9)<br />on the Daily Batik and Traditional Weaving Lurik Service or ATBM Striated and<br />the Klaten Regent's Decree Number : 065/1014/06 December 30, 2010 on Wearing<br />Traditional Weaving, Motives, Colors and Free Models with Attributes. Furthermore,<br />based on the Decree of the Regent of Klaten Number 050/84 of 2016 on Klaten<br />Regency's Superior Products, batik striated is one of the superior products of Klaten<br />Regency. With the issuance of these rules as an effort to protect and preserve lurik<br />art in Klaten district and referring to Law Number 28 of 2014 on Copyright, it has<br />regulated the forms of protection of lurik art in Klaten through Article 40 paragraph<br />(1). The Second Protection of Intellectual Property Rights Against Lurik Art, namely<br />Protection of lurik artworks, besides being accommodated in Law Number 28 of 2014<br />on Copyright (Copyright Law) and Trademark Law and other intellectual property<br />right laws. Elucidation of Article 40 paragraph (1) letter j of the Copyright Law. The<br />work is protected because it has artistic value, both in relation to the picture, style,<br />and color composition. The Copyright Act also emphasizes that it is important to<br />protect Copyright because every creator, in this case, the creator of the lurik motif<br />has the right to moral rights and economic rights.

Simulation of plain structures of spatial curvature

The article substantiates the necessity of modeling double-curved woven structures and presents the results of the development of the woven structure model of layers on the varying shape of the cross- section of the mandrel along the axis with spatial curvature. The developed mathematical apparatus for modeling woven structures is built into the created software. The results of building models of woven structures are presented. To make it possible to obtain woven structures with double curvature, the plaque was upgraded. The application of the developed technology will allow us to move to a new level of managing the properties and form of products, improve the integration of structures, reduce the laboriousness of manufacturing parts, and reduce the weight of structures as a whole.

Multiscale analysis of multilayer printed circuit board using mechanics of structure genome

The structure of Printed Circuit board (PCB) is very complicated because it consists of woven composites and custom defined conducting layers. To improve the reliability of PCB, it is critical to predict the constitutive relations accurately. This study by implementing Mechanics of Structure Genome (MSG), homogenizes a multilayer PCB to determine the effective mechanical properties and coefficient of thermal expansions. The homogenization is divided into two steps. The first step is to obtain the yarn material properties. The second is to write python script in TexGen4SC to generate the woven model and combine it with conducting layers in ABAQUS to obtain the PCB effective material properties. A new tool, which is freely accessible at cdmHUB, was developed to integrate the two steps woven homogenization. The homogenized material properties were validated with representative volume element (RVE) analysis. A good agreement was observed between MSG and RVE analysis. Finally, both structural analysis and dehomogenization were done to predict a PCB plate global responses and local stress fields. MSG-based plate structural analysis and dehomogenization matched the direct numerical simulation (DNS) very well. However, MSG is significantly faster than DNS.

Experimental Studies and Vulnerability Assessment of Timber-Arched Lounge Bridges

ABSTRACTThere are many preserved timber-arched lounge bridges in China and some of these bridges are hundreds of years old. The woven arch is the main bearing structure of a timber-arched lounge bridge. Few studies still exist about woven arch mechanical performance, a fact that contributes to the improper repair. This article concerns the structural performance of the woven arch. The results of experimental studies on deformation, stress distribution, force-transferring mechanism, and failure modes were presented. Two woven arch models with and without П-shape braces under symmetrical load and asymmetrical load were investigated. The results indicated that the woven arch had high bearing capacity, especially under symmetrical load. The comparison of experimental results obtained for models with and without brace showed that braces modified the failure mechanism and increased the load carrying capacity and integrity. Based on the failure conditions observed experimentally, limit criteria were defined in order to facilitate vulnerability assessment of timber lounge bridges.

Runtime Reusable Weaving Model for Cloud Services Using Aspect-Oriented Programming

Cloud computing technology has opened an avenue to meet the critical need to securely share distributed resources and web services, and especially those that belong to clients who have sensitive data and applications. However, implementing crosscutting concerns for cloud-based applications is a challenge. This challenge stems from the nature of distributed Web-based technology architecture and infrastructure. One of the key concerns is security logic, which is scattered and tangled across all the cloud service layers. In addition, maintenance and modification of the security aspect is a difficult task. Therefore, cloud services need to be extended by enriching them with features to support adaptation so that these services can become better structured and less complex. Aspect-oriented programming is the right technical solution for this problem as it enables the required separation when implementing security features without the need to change the core code of the server or client in the cloud. Therefore, this article proposes a Runtime Reusable Weaving Model for weaving security-related crosscutting concerns through layers of cloud computing architecture. The proposed model does not require access to the source code of a cloud service and this can make it easier for the client to reuse the needed security-related crosscutting concerns. The proposed model is implemented using aspect orientation techniques to integrate cloud security solutions at the software-as-a-service layer.

Curriculum Weaving: Developing Creative Curricular Opportunities for Pre-Service Teachers and Elementary Students through Project-Based Learning

Curriculum Weaving uses multi-layered goal planning designed to activate the students' prior knowledge, connect thestudent to student competencies and encourage them to engage in professionally-based, project management activitiesthat will cultivate effective professional in the field classroom teacher. The focus of weaving these elements togetherthrough a project based event fosters a shift to a more holistic and contextualized perspective of the learner. In ourmodel of Curriculum Weaving, we see this process as one that describes the uniting of daily theoretical requirements,student lived experiences, and intangible skill sets into a larger perspective of learning as represented by holisticthinking. The following article describes the Curriculum Weaving Model as it was applied to a children’s book authorvisit.

Numerical investigation of the influence of heat source modeling on simulated residual stress distribution in weaving welds

The influence of the modeling of the weaving of a heat source on the simulated residual stress distribution was examined. Two types of heat source models, “weaving” and “quasi-weaving,” were used. The former modeled the weaving directly, and the latter simplified the weaving heat source to a wide and straight-moving one. When the weaving heat source was used, fluctuating temperature histories, wave-like fusion lines, and serrated residual stress distributions were obtained. Three different quasi-weaving heat source models have different combinations of the heat flux value per unit volume and the elements to which the heat source was introduced. The temperature distributions around the welds were different depending on quasi-weaving models used. However, when the temperature distributions of the weaving welds could be reproduced precisely by a quasi-weaving model, smoothed temperature histories and residual stress distributions were simulated, and the values obtained were comparable to those obtained with the weaving model. On the other hand, when the temperature distribution was not well reproduced, the residual stress distribution did not agree with that of the weaving model. The results suggest that the modeling of a weaving heat source using a quasi-weaving model requires adjustment of the temperature distribution.

The Specification of ETL Transformation Operations based on Weaving Models

In the ETL process the transformation of data is achieved through the execution of a set of transformation operations. The realization of this process (the order in which the transformation operations must be executed) should be preceded by a specification of the transformation process at a higher level of abstraction. The specification is given through mappings representing abstract operations specific to the transformation process. These mappings are defined through weaving models and metamodels. A generated weaving metamodel (GWMM) is proposed giving the complete mapping semantics through specific link types (representing the abstract operations) and appropriate OCL constraints. Weaving models specifying the actual mappings must be in accordance with this proposed GWMM.

OS0712 CFRTPプリブレグ物性予測のためのメゾスケール解析

Using a mesoscopic model is a common and effective approach to predict the physical properties of woven composites. However, the main drawback of the conventional meso-model, which has the continuous mesh, is the difficulty of meshing the matrix, especially near the interfaces with the reinforcement. The model superposing a reinforcement mesh and applying a constraint based coupling is considered to be an effective modeling technique to solve this issue. To assess the capability of the coupling model, we compare the predictive mechanical properties of UD and the plain woven model between the coupling model and conventional model. The results show a good agreement between the two models.

Detecting and Evaluating Semantic Influences of Aspect Weaving in Aspect Oriented Models

Weaving an aspect may introduce undesired impacts on behavior of the base model or other afore-woven aspects. An approach to detect and evaluate the semantic influences of an aspect weaving on a pattern is presented. The pattern specifies a desired behavior that should stay unaltered or occur in the woven model. The detection and evaluation are based on the semantic relationship between a pattern and its projection that represents its actual semantics in the woven model. Five types of aspect weaving influences are identified. The approach has the Process Algebras (PA) as the underlying formalisms and has been implemented by mapping to the Concurrency Workbench (CWB) tool. An example shows the effectiveness.

Specification of data schema mappings using weaving models

Weaving models are used in the model driven engineering (MDE) community for various application scenarios related to model mappings. However, an analysis of its suitability for specification of heterogeneous schema mappings reveals that weaving models lack support for mapping rules and, therefore, cannot prevent mapping specifications which are semantically meaningless, wrong or disallowed. This paper proposes a solution which overcomes the identified open issue by providing the explicit support for semantic mapping rules. It is based on introduction of weaving metamodels augmented with constraints written in OCL. The role of OCL constraints is to restrict mapping specifications to only those which are semantically meaningful. Using well known MDE technologies, such as EMF and QVT, an existing tool is used to validate the presented solution. This solution is also successfully evaluated in practice.