Please wait, while we are loading the content...
| Content Provider | EDP Sciences |
|---|---|
| Author | F. Gálvez J. Rodríguez V. Sánchez Gálvez |
| Abstract | Brittle materials, as advanced ceramics, present a weak behaviour under tensile loads. For that reason, determination of the tensile strength in these materials is needed. A testing methodology to measure this property is not well defined, more highlighted at high strain rates, where dynamic loads make testing more complex. Uniaxial tensile tests are very difficult to reach out, and alternative tests have been proposed. Testing at high strain rates with three or four point bending tests or the diametrical compression of short cylindrical specimens are widely used. In those tests the stress state is not uniaxial and if the equilibrium in the specimen is not reached, interpretation of results becomes more complex. For that reason a new testing method has been proposed, the spalling test of long bars. This test can provide the tensile strength of brittle materials at high strain rates in uniaxial conditions. In this work, the experimental set-up developed in the Department of Materials Science of the Polytechnic University of Madrid is presented. The experimental device is based in the wave propagation in long rods and its reflection in a free end. In this paper, the equipment developed and used is explained in detail. With high-speed photography and an analytical analysis, the tensile strength can be measured. The stress wave reflection at the free end of the specimen bar causes the failure. This reflection progress is simulated by an analytical tool, and the stress state at the moment of rupture and the position of the first crack are measured, providing the maximum tensile stress in the material. It is also described the method to determine the tensile strength based on the data obtained from the instrumentation of the device and the measurements in the pictures taken. The results obtained in long rod specimens of alumina are presented. |
| Ending Page | Pr9-208 |
| Starting Page | Pr9-203 |
| Page Count | 6 |
| File Format | HTM / HTML PDF |
| ISSN | 11554339 |
| Alternate Webpage(s) | http://dx.doi.org/10.1051/jp4:2000934 |
| Issue Number | PR9 |
| Journal | Le Journal de Physique IV |
| Volume Number | 10 |
| DOI | 10.1051/jp4:2000934 |
| Language | English |
| Publisher | EDP Sciences |
| Publisher Date | 2000-09-01 |
| Access Restriction | Subscribed |
| Rights Holder | EDP Sciences |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|