Low Velocity Impact Response of Composite Sandwich Structure with Hybrid Honeycomb Core / (Record no. 610901)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02914nam a22001577a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 621 |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Ayub, Usman |
| 245 ## - TITLE STATEMENT | |
| Title | Low Velocity Impact Response of Composite Sandwich Structure with Hybrid Honeycomb Core / |
| Statement of responsibility, etc. | Usman Ayub |
| 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 | 2024. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 70p. |
| Other physical details | Soft Copy |
| Dimensions | 30cm |
| 500 ## - GENERAL NOTE | |
| General note | Lightweight design is one of the key characteristics of engineering design, as light weight not only<br/>reduces operational cost but also reduces the impact on environment due to lesser fuel<br/>consumption. The use of sandwich structures is an important advancement in this regard, as<br/>sandwich structures use geometrically efficient design to reduce weight and offer superior<br/>properties like increased specific strength and stiffness, better fatigue and impact resistance,<br/>thermal conductivity and corrosion resistance as compared to their metallic counterparts.<br/>Sandwich structures, specifically with honeycomb core and fiber reinforced composite face sheets<br/>have been extensively used in aerospace, ship building, rail industry, military and auto motives.<br/>Impact loading, especially low velocity impact, is one of the most critical loading scenario for<br/>sandwich structures, as impact can cause strength degradation and barely visible damage, which<br/>can compromise the structural integrity. In recent times, most of the research has focused on<br/>improving the impact resistance of honeycomb sandwich structures by filling honeycomb with a<br/>filler material because the porous structure of honeycomb cells is the weakest region against impact<br/>loads, especially against oblique impact. This research also focuses on improving the impact<br/>resistance of conventional honeycomb by addition of aluminum grid and foam in honeycomb (HC)<br/>to produce a hybrid honeycomb (HHC) core sandwich panel. Impact tests are carried out using<br/>drop weight method at 30J and 45J for both conventional HC and HHC core and results are<br/>recorded in the form of force-displacement, force-time and energy time-response. The testing<br/>shows that HHC sustained higher peak force and lower displacement as compared to conventional<br/>HC core. The performance index, which compares the performance of HHC with conventional<br/>HC, for HHC-foam impact was 1.31 and 1.26 times for 30J and 45J respectively while for HHCgrid impact was 1.14 and 1.16 times for 30J and 45J respectively, highlighting the improved impact<br/>resistance of HHC core sandwich panels. Damage characterization through macroscopic damage<br/>analysis for damage on surface as well as internal damage was also performed highlighting the<br/>various damage modes like delamination, matrix cracking, core crushing and core buckling among<br/>other. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | MS Mechanical Engineering |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Supervisor : Dr. Aamir Mubashar |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="http://10.250.8.41:8080/xmlui/handle/123456789/45362">http://10.250.8.41:8080/xmlui/handle/123456789/45362</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 | 08/13/2024 | 621 | SMME-TH-1046 | Thesis |