Optimization of machining parameters of Nomex honeycomb core for the development of a mesoscale numerical model to predict deformation and failure in core structures / (Record no. 607258)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02562nam a22001697a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | NUST |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 670 |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Habib, Hassan |
| 245 ## - TITLE STATEMENT | |
| Title | Optimization of machining parameters of Nomex honeycomb core for the development of a mesoscale numerical model to predict deformation and failure in core structures / |
| Statement of responsibility, etc. | Hassan Habib |
| 264 ## - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Place of production, publication, distribution, manufacture | Islamabad : |
| Name of producer, publisher, distributor, manufacturer | SMME- NUST; |
| Date of production, publication, distribution, manufacture, or copyright notice | 2023. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 68cmp. ; |
| Other physical details | Soft Copy |
| Dimensions | 30cm. |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Nomex ® Honeycomb core is the foundational building block for the manufacturing of<br/>aerospace composite components. Its usage requires machining honeycomb in complex<br/>aerodynamic profiles which is of prime importance because of the complexities of the geometry<br/>involved. Machining defects of honeycomb core may result in the failure of sandwich structures<br/>when subjected to impact failures or fatigue failures. The quality of Honeycomb Core (HC Core)<br/>is governed by the accuracy and precision of these cut profiles. The assessment of accuracy and<br/>precision is directly related to the forces induced in the cutting tool and the cutting efficiency.<br/>These two parameters form the basis of a multi objective function that this paper aims to optimize<br/>for the milling operation. Based on literature review spindle speed, feed rate and depth of cut are<br/>taken as the influencing parameters. Taguchi based array of Design of Experiments is used to<br/>construct the experiments followed by ANOVA analysis and correlation analysis. The results<br/>indicate that the most significant factor is the feed rate with percentage contribution of 72% for<br/>the cutting forces and depth of cut with percentage contribution of 85% in case of cutting<br/>efficiency. The two parameters are then optimized using Desirability Function Analysis (DFA)<br/>and Grey Relational Analysis (GRA). The results are validated by experimental runs and the error<br/>is within 5% of the statistical predictions, whereas the percentage improvement in cutting forces<br/>for optimum run as compared to worst experimental run is 47.8%. The percentage improvement<br/>in cutting efficiency likewise is 11%. Numerical model was built on ABAQUS to simulate the<br/>machining process and the simulation was run using 2D Hashin Criteria. Furthermore, the<br/>simulation of the Honeycomb core was done using Johnson Cook Criteria.<br/> |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | MS Design and Manufacturing Engineering |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Supervisor : Dr. Muhammad Salman Khan |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="http://10.250.8.41:8080/xmlui/handle/123456789/37847">http://10.250.8.41:8080/xmlui/handle/123456789/37847</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | |
| Koha item type | Thesis |
| Withdrawn status | Permanent Location | Current Location | Shelving location | Date acquired | Full call number | Barcode | Koha item type |
|---|---|---|---|---|---|---|---|
| School of Mechanical & Manufacturing Engineering (SMME) | School of Mechanical & Manufacturing Engineering (SMME) | E-Books | 12/08/2023 | 670 | SMME-TH-913 | Thesis |