| Title |
A study on the impact performance of fibre reinforced polymer composites by analysing the effects of nano-fillers, hybridisation and fibre waviness / |
| Translation of Title |
Pluoštu armuotų polimerinių kompozitų smūginės elgsenos tyrimai analizuojant nano užpildų, hibridizavimo ir pluošto banguotumo įtakas. |
| Authors |
Peethambaran Subadra, Sharath |
| Full Text |
|
| Pages |
168 |
| Keywords [eng] |
fibre reinforced polymer composites ; hybrid composites ; impact performance ; experimental studies ; simulations |
| Abstract [eng] |
Polymer composites are widely used in applications ranging from the automotive to the aerospace sector. During their service life these materials are subjected to various loading conditions and their failure mechanisms are unique among materials because it's a combinations of various failure mechanisms like delamination, debonding, fibre rupture that causes the final damage. Low velocity impact damages are characterised by matrix determinant delamination and this PhD dissertation is an attempt to study the causes and ways to improve impact performances of composites. In this regard, nano reinforcements were used initially to improve the impact resistance. Though experiments showed that such methods do improve the impact performance, but the method is limited by its sophistication and costs. Improvement of impact performance was accessed by introducing hybrid architectures into composites, which transformed the brittle nature of composites into more “ductile-like” nature. Termed as the hybrid-effect which makes composite damage more predictable and, in the process, making them tougher by taking in more energy to initiate and propagate damage. To further understand the role of matrix, in-plane and out-of-plane waviness was introduced and subjected to flexure in addition to hybrid architectures. It was observed that the presence of in-plane waviness improved the load bearing capacity of composites under flexure. Numerical simulations showed that two strain parameters affected the numerical outcome to match with that of the experimental observations. Deducing from this outcome, the introduction of in-plane waviness affects the shear properties which is affected greatly by the matrix being used which lend itself to better flexural performance and since flexure dominates while under impact, could lend to better impact resistance. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Doctoral thesis |
| Language |
English |
| Publication date |
2023 |
