報告時間：2023年11月28日（星期二）10:00
報告地點：屯溪路校區(qū)緯地樓501室
報 告 人：Rajarshi Das 教授
工作單位：澳大利亞皇家墨爾本理工大學
舉辦單位：土木與水利工程學院
報告簡介：
A fundamental understanding of pure shear failure is important in elucidating the failure characteristics of woven thermoplastic composites. This work presents a novel S-specimen design and an associated methodology for testing pure in-plane shear failure in composites. The technique has been experimentally tested with woven thermoplastic composites which have complex failure evolution in shear due to their weave architecture. Four different composites were considered to demonstrate the scope of the technique application, with various combinations of weave. A Digital Image Correlation (DIC) system integrated with the hemispherical testing device validated that shear strain was the dominant strain in the failure region. From this work, it is evident that shear failure morphology varies between the tested composites based on the differences in their weave architecture and fibre and matrix properties. Additional Finite Element Analysis (FEA) showed that neither bending nor friction hindered the tests ability to produce pure shear in the specimen. This new shear specimen provides a means of inducing shear failure utilising the hemispherical dome apparatus currently used for composite forming studies and failure analysis of other deformation modes between uniaxial and equi-biaxial tension.
報告人簡介：
Raj Das為澳大利亞皇家墨爾本理工大學教授，現(xiàn)任該校“勞倫斯·瓦克特爵士研究中心”先進材料與結(jié)構(gòu)模擬研究所所長，主要從事工程材料和結(jié)構(gòu)的設計、分析和優(yōu)化等方面的研究工作，專注于計算力學、結(jié)構(gòu)優(yōu)化、復合材料結(jié)構(gòu)、失效分析和損傷容限設計，在國際期刊和會議上發(fā)表論文250多篇。Raj教授目前擔任“國際斷裂大會”澳大利亞執(zhí)行委員會主任，同時擔任澳大利亞工程師協(xié)會“應用力學全國委員會”主席，還曾擔任過多個知名國際會議，如ICM-13、ACAM-8、ACCM-3、ICCM-6的主席或共同主席。
