Journal
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
Volume 77, Issue -, Pages 68-83Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijimpeng.2014.11.003
Keywords
Energy absorption; Multiple loading cases; Functionally graded thickness (FGT); Tapered tubes; Oblique impacting
Categories
Funding
- National Natural Science Foundation of China [61232014, 11202072, 11102067]
- Doctoral Fund of Ministry of Education of China [20120161120005]
- Open Fund of Key Laboratory of Manufacture and Test Techniques for Automobile Parts (Chongqing University of Technology), Ministry of Education [KLMT201201]
- Open Fund of Traction Power State Key Laboratory of Southwest jiaotong University [TPL1206]
Ask authors/readers for more resources
As a relatively new component with a higher efficiency of material utilization, functionally graded thickness (FGT) structure with probably varying wall thickness becomes fairly promising. This paper compares the energy absorption capabilities of FGT, tapered uniform thickness (TUT) and widely-utilized straight uniform thickness (SUT) tubes subjected to oblique impact loading. The analytical formula is derived for the geometric relationships of these three different configurations (FGT, SUT and TUT) with the same weight. Based on the validated finite element (FE) models, a series of crushing analyses are performed to quantify the specific energy absorption (SEA) of different tubes under axial (0) and oblique impact loading by varying the loading angles (10, 20, 30). The FGT tubes demonstrate to be more preferable to the others as an energy absorber attributable to their higher capacity of withstanding the oblique loads. Then, crushing analyses of FGT tubes with different gradient exponents are performed to quantify specific energy absorption (SEA) and maximum crashing force. The critical loading angle at which the global buckling occurs is identified for the FGT tubes, and it is found that the energy absorption capacity of FGT tubes, especially with gradient exponent 2.0, was well maintained as the impacting angle increases. The results obtained from this study provide some insights into the design of FGT tube as a potential energy absorber where oblique impact loading is inevitable. (C) 2014 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available