Showing 2 results for Shirzadifar
Mohammad Shirzadifar, Ali Abdollahifar,
Volume 11, Issue 2 (6-2021)
Abstract
This paper introduces a new configuration of ladder chassis containing a set of linear wave springs to improve the lateral stability of road vehicles. The governing equations for lateral stability of the ladder frame equipped with linear wave springs were derived. In order to investigate this new system a unit base of the ladder frame equipped with linear wave springs and a typical ladder frame were modeled using FEM methods (ABAQUS) with the same size conditions. This comparative study is utilized to validate the derived equations and also to compare the effectiveness of the new designed system with typical ladder frames. Results indicate that the new system has considerably improved the lateral stability of the vehicle during road transportation and also noticeably decreased the stress on the side and cross members.
Dr Mohammad Shirzadifar, Dr Javad Marzbanrad,
Volume 14, Issue 1 (3-2024)
Abstract
The corrugated composite plates have wide application to improve the energy absorption and failure behavior of panel structures. The roof panel of the bus could benefit from the use of these structures to reduce impact failures in rollover accidents. The aim of this paper is to design a new configuration of bus roof panels stiffened with multi-layer semi-circular corrugated CFRP plates to minimize structure failure during rollover accidents. An analytical failure equation of Tsai-Hill index for the new proposed panel subjected to dynamic impact loading has been derived. The failure equation was validated using FEM methods and digital image correlation impact tests. According to the roll over impact situation, the multi-layered semi-circular corrugated woven CFRP roof panel displays a positive failure behavior of 89%.
