Sandwich Core Cracks Approaching the Interface Between the Core and Face Sheets

2007 ◽  
Author(s):  
J. H. Andreasen
Keyword(s):  
Maximum Stress ◽  
Object Oriented Programming ◽  
Programming Environment ◽  
Pure Bending ◽  
The Core ◽  
Sandwich Construction ◽  
Crack Tips ◽  
Maximum Stress Intensity ◽  
Sandwich Core

Cracks approaching the interfaces in the core of a sandwich construction are investigated. For pure tension, pure bending and shear the cracks are shown to go through a regime where a maximum stress intensity factor is attained before the crack tips enter the interface. The cracks are analyzed within the framework of analytical elasticity. The analysis methods are outlined, and the solution is established in an object oriented programming environment, which allows solutions to be obtained for a wide variety of parameters. Results are given in terms of a case study pertaining to sandwich constructions with aluminum faces and two different foamed PVC core, as well as in more generalized terms.

Estimation of the Scope of Change Propagation in Object-Oriented Programming

2010 ◽  
Author(s):  
Elmira Rajinia ◽  
Simon Li
Keyword(s):  
Computer Program ◽  
Systematic Approach ◽  
Matrix Representation ◽  
Object Oriented ◽  
Object Oriented Programming ◽  
Change Propagation ◽  
The Core ◽  
The Matrix ◽  
Made In

When minor modifications need to be made in an object-oriented computer program, they often incur further more changes due to the presence of dependency in the codes and the program structure. Yet, to accommodate the required change, there can also be more than one option to carry out the initial modifications. To select the modification option in this context, this paper proposes a systematic approach to estimate the scope of change propagation of an object-oriented program given some initial modifications. The strategy is to first capture the dependency relationships of the entities pertaining to an object-oriented program via the matrix representation. Based on this matrix-based model, the priority number method is proposed and applied to estimate the scope of change propagation by assuming some initial modifications. The core of this method is to estimate the chance of affecting other program entities due to some modified entities. A case study is conducted throughout the paper to illustrate and justify the proposed method.

Modeling of Metallic Sandwich Structures

2003 ◽  
Author(s):  
Zhenyu Xue
Keyword(s):  
Constitutive Model ◽  
Blast Resistance ◽  
Constitutive Models ◽  
Complex Structures ◽  
Plate Structures ◽  
The Core ◽  
Sandwich Construction ◽  
Alternative Means ◽  
Anisotropic Elastic ◽  
Sandwich Core

All-metal sandwich construction holds promise for significant improvements in stiffness, strength and blast resistance for built-up plate structures. Analysis of the performance of sandwich plates under various loads, static and dynamic, requires modeling of face sheets and core with some fidelity. While it is possible to model full geometric details of the core for a few selected problems, this is unrealistic for larger complex structures under general loadings. A constitutive model can be proposed as an alternative means of modeling the sandwich core. The constitutive model falls within the framework of a compressible rate-independent, anisotropic elastic-plastic solid. In this paper, the model will be presented in details, along with numerical implementation in a finite element code, and benchmarks its performance against existing constitutive models.

Shape Memory Polymer With Aluminum Tube Reinforced Impact Resistant Sandwich Core

2012 ◽  
Author(s):  
Gefu Ji ◽  
Guoqiang Li ◽  
Su-Seng Pang
Keyword(s):  
Shape Memory ◽  
Structural Integrity ◽  
Safety Concern ◽  
Shape Memory Polymer ◽  
Sandwich Panels ◽  
Low Velocity ◽  
The Core ◽  
Sandwich Construction ◽  
Structural Applications ◽  
Sandwich Core

Sandwich construction has been extensively used in various fields. However, sandwich panels have not been fully exploited in critical structural applications due to damage tolerance and safety concern. A major problem of sandwich panels is the debonding at or near the core/face sheet interface, especially under impact loading, which can lead to a sudden loss of structural integrity and cause catastrophic consequences. In order to improve the debonding resistance and energy absorption of sandwich panel under impact loadings, a new sandwich core is proposed which is a hybrid core consisting of hollow metallic millitubes reinforced Shape Memory Polymer matrix. The objective of this study was to characterize its dynamic performances. The core consisted of programmed shape memory polymer resin. Low velocity (4m/s) impact tests demonstrated that new core panel may be considered a promising option for critical structural applications featured by debonding and multiple impact tolerance.

Possessing the Iconic Book

2012 ◽  
Vol 6 (1-3) ◽  
pp. 309-329
Author(s):  
Claudia V. Camp
Keyword(s):  
Second Century ◽  
Religious Literature ◽  
Ben Sira ◽  
The Core ◽  
The Bible ◽  
Iconic Status ◽  
The Voice ◽  
Woman Wisdom ◽  
Martin Marty

I propose that the notion of possession adds an important ideological nuance to the analyses of iconic books set forth by Martin Marty (1980) and, more recently, by James Watts (2006). Using the early second century BCE book of Sirach as a case study, I tease out some of the symbolic dynamics through which the Bible achieved iconic status in the first place, that is, the conditions in which significance was attached to its material, finite shape. For Ben Sira, this symbolism was deeply tied to his honor-shame ethos in which women posed a threat to the honor of his eternal name, a threat resolved through his possession of Torah figured as the Woman Wisdom. What my analysis suggests is that the conflicted perceptions of gender in Ben Sira’s text is fundamental to his appropriation of, and attempt to produce, authoritative religious literature, and thus essential for understanding his relationship to this emerging canon. Torah, conceived as female, was the core of this canon, but Ben Sira adds his own literary production to this female “body” (or feminized corpus, if you will), becoming the voice of both through the experience of perfect possession.

Parallelizing Web Service Upload \ Download files

2018 ◽  
Vol 8 (3) ◽  
pp. 15
Author(s):  
Mustapha Mohammed Baua'a
Keyword(s):  
Web Services ◽  
Response Time ◽  
Web Service ◽  
File System ◽  
Programming Environment

The I\O file system Read\Write operations are considered the most significant characteristics. Where, many researchers focus on their works on how to decrease the response time of I\O file system read\write operations. However, most articles concentrate on how to read\write content of the file in parallelism manner. Here in this paper, the author considers the parallelizing Read\Write whole file bytes not only its contents. A case study has been applied in order to make the idea more clear. It talks about two techniques of uploading\downloading files via Web Service. The first one is a traditional way where the files uploaded and downloaded serially. While the second one is uploaded\ downloaded files using Java thread in order to simulate parallelism technique. Java Netbeans 8.0.2 have been used as a programming environment to implement the Download\Upload files through Web Services. Validation results are also presented via using Mat-lab platform as benchmarks. The visualized figures of validation results are clearly clarifying that the second technique shows better response time in comparison to the traditional way.

scholarly journals Re-defining gender as a heinous crime: A case study from the Brazilian Chamber of Deputies

2020 ◽  
pp. 095792652097721
Author(s):  
Janaina Negreiros Persson
Keyword(s):  
Discourse Analysis ◽  
Critical Discourse Analysis ◽  
Gender Ideology ◽  
Critical Discourse ◽  
Public Hearing ◽  
Rhetorical Invention ◽  
Social Actors ◽  
The Public ◽  
The Core

In this article, we explore how the discourses around gender are evolving at the core of Brazilian politics. Our focus lies on the discourses at the public hearing on the bill 3.492/19, which aimed at including “gender ideology” on the list of heinous crimes. We aim to identify the deputies’ linguistic representation of social actors as pertaining to in- and outgroups. In addition, the article analyzes through Critical Discourse Analysis how the terminology gender is represented in this particular hearing. The analysis shows how some of the conservative parliamentarians give a clearly negative meaning to the term gender, by labeling it “gender ideology” and additionally connecting it with heinous crimes. We propose that the re-signification of “gender ideology,” from rhetorical invention to heinous crime, is not only an attempt to undermine scientific gender studies but also a way for conservative deputies to gain more political power.

scholarly journals A clarified typology of core-periphery structure in networks

2021 ◽  
Vol 7 (12) ◽  
pp. eabc9800
Author(s):  
Ryan J. Gallagher ◽  
Jean-Gabriel Young ◽  
Brooke Foucault Welles
Keyword(s):  
Dense Core ◽  
Block Model ◽  
Hub And Spoke ◽  
Block Modeling ◽  
Domain Specific ◽  
The Core ◽  
Detailed Case ◽  
Rich Diversity ◽  
Modeling Techniques

Core-periphery structure, the arrangement of a network into a dense core and sparse periphery, is a versatile descriptor of various social, biological, and technological networks. In practice, different core-periphery algorithms are often applied interchangeably despite the fact that they can yield inconsistent descriptions of core-periphery structure. For example, two of the most widely used algorithms, the k-cores decomposition and the classic two-block model of Borgatti and Everett, extract fundamentally different structures: The latter partitions a network into a binary hub-and-spoke layout, while the former divides it into a layered hierarchy. We introduce a core-periphery typology to clarify these differences, along with Bayesian stochastic block modeling techniques to classify networks in accordance with this typology. Empirically, we find a rich diversity of core-periphery structure among networks. Through a detailed case study, we demonstrate the importance of acknowledging this diversity and situating networks within the core-periphery typology when conducting domain-specific analyses.

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