Temperature dependent dynamic compressive response of PA66-GF30 composite under constant strain rate multiaixal loading
This paper studies the uniaxial and multiaxial dynamic compressive behaviour and failure of PA66-GF30 (30 wt % glass fibre reinforced polyamide 66), a typical light weight and high strength composite increasingly used in automobiles including the electric cars in applications from ambient temperatur...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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Elsevier
2022
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| _version_ | 1797108872691843072 |
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| author | Zhang, L Townsend, D Petrinic, N Pellegrino, A |
| author_facet | Zhang, L Townsend, D Petrinic, N Pellegrino, A |
| author_sort | Zhang, L |
| collection | OXFORD |
| description | This paper studies the uniaxial and multiaxial dynamic compressive behaviour and failure of PA66-GF30 (30 wt % glass fibre reinforced polyamide 66), a typical light weight and high strength composite increasingly used in automobiles including the electric cars in applications from ambient temperature to elevated temperatures up to 90 °C. Likewise, the constitutive relation of PA66-GF30 is characterized from quasi-static to high strain rates. Constant high strain rate loading is achieved by pulse shaping technique on a bespoke split Hopkinson bar. The stress-strain relations are pressure, strain rate and temperature dependent. Effects of strain rate and temperature are found to be decoupled on the pressure sensitivity of PA66-GF30. Beyond maximum stress, micro crack has already formed in dynamically deformed PA66-GF30, which corresponds to macro strain localization monitored by high speed photography and digital image correlation techniques. The PA66-GF30 with confinement shows adiabatic shear failure, with fibres coated by severe shear matrix facets and evenly distributed filaments. This is different from the unconfined PA66-GF30 which shows fibres pull out in the fractured matrix. A modified Drucker-Prager model is proposed to describe the pressure dependent compressive strength of PA66-GF30 over various strain rates and temperatures.
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| first_indexed | 2024-03-07T07:34:10Z |
| format | Journal article |
| id | oxford-uuid:efdf12a5-5711-43db-ae8a-3c512da3292b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:34:10Z |
| publishDate | 2022 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:efdf12a5-5711-43db-ae8a-3c512da3292b2023-02-13T09:18:45ZTemperature dependent dynamic compressive response of PA66-GF30 composite under constant strain rate multiaixal loading Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:efdf12a5-5711-43db-ae8a-3c512da3292bEnglishSymplectic ElementsElsevier2022Zhang, LTownsend, DPetrinic, NPellegrino, AThis paper studies the uniaxial and multiaxial dynamic compressive behaviour and failure of PA66-GF30 (30 wt % glass fibre reinforced polyamide 66), a typical light weight and high strength composite increasingly used in automobiles including the electric cars in applications from ambient temperature to elevated temperatures up to 90 °C. Likewise, the constitutive relation of PA66-GF30 is characterized from quasi-static to high strain rates. Constant high strain rate loading is achieved by pulse shaping technique on a bespoke split Hopkinson bar. The stress-strain relations are pressure, strain rate and temperature dependent. Effects of strain rate and temperature are found to be decoupled on the pressure sensitivity of PA66-GF30. Beyond maximum stress, micro crack has already formed in dynamically deformed PA66-GF30, which corresponds to macro strain localization monitored by high speed photography and digital image correlation techniques. The PA66-GF30 with confinement shows adiabatic shear failure, with fibres coated by severe shear matrix facets and evenly distributed filaments. This is different from the unconfined PA66-GF30 which shows fibres pull out in the fractured matrix. A modified Drucker-Prager model is proposed to describe the pressure dependent compressive strength of PA66-GF30 over various strain rates and temperatures. |
| spellingShingle | Zhang, L Townsend, D Petrinic, N Pellegrino, A Temperature dependent dynamic compressive response of PA66-GF30 composite under constant strain rate multiaixal loading |
| title | Temperature dependent dynamic compressive response of PA66-GF30 composite under constant strain rate multiaixal loading
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| title_full | Temperature dependent dynamic compressive response of PA66-GF30 composite under constant strain rate multiaixal loading
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| title_fullStr | Temperature dependent dynamic compressive response of PA66-GF30 composite under constant strain rate multiaixal loading
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| title_full_unstemmed | Temperature dependent dynamic compressive response of PA66-GF30 composite under constant strain rate multiaixal loading
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| title_short | Temperature dependent dynamic compressive response of PA66-GF30 composite under constant strain rate multiaixal loading
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| title_sort | temperature dependent dynamic compressive response of pa66 gf30 composite under constant strain rate multiaixal loading |
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