Impact energy absorption characteristics of composite structures

In an effort to improve impact energy-absorption characteristics, this study introduces a cylindrical crash absorber (CAP) with discontinuous protrusions and a continuous local-expansion plastic-forming method for its manufacture. The mechanical properties of the cylindrical energy-absorption structure were modified by installing multiple particle protrusions on the cylinder sidewall to reduce the initial pickup load and improve the impact energy-absorption performance. To facilitate manufacture of the proposed CAP, a cylindrical rubber piece was placed into a cylindrical tube and pressure was applied to the rubber from both ends of the tube. The CAP was formed by the bulging force of the rubber. The formability was verified by developing a successive local bulge-forming experimental device and comparing the manufactured CAP with the results of numerical simulations. Testing of quasi-static collapse conducted on a CAP manufactured using this device verified the effectiveness of the proposed CAP design and its plastic-forming method. It was determined that this design reduced the initial peak load, and the crash absorber could maintain stability over a long, continuous distance during crushing deformation.

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Experimental study of impact energy absorption by reinforced braided composite structures: Dynamic crushing tests

Composites Part B Engineering ◽

10.1016/j.compositesb.2015.03.083 ◽

2015 ◽

Vol 78 ◽

pp. 244-255 ◽

Cited By ~ 19

Author(s):

O. Dorival ◽

P. Navarro ◽

S. Marguet ◽

C. Petiot ◽

M. Bermudez ◽

...

Keyword(s):

Experimental Study ◽

Energy Absorption ◽

Impact Energy ◽

Composite Structures ◽

Braided Composite ◽

Dynamic Crushing

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Dynamic Fracture and Impact Energy Absorption Characteristics of PMMA-PU Transparent Interpenetrating Polymer Networks (IPNs)

Dynamic Behavior of Materials, Volume 1 - Conference Proceedings of the Society for Experimental Mechanics Series ◽

10.1007/978-3-319-00771-7_32 ◽

2013 ◽

pp. 277-284 ◽

Cited By ~ 2

Author(s):

K. C. Jajam ◽

H. V. Tippur ◽

S. A. Bird ◽

M. L. Auad

Keyword(s):

Energy Absorption ◽

Dynamic Fracture ◽

Impact Energy ◽

Polymer Networks ◽

Interpenetrating Polymer Networks ◽

Absorption Characteristics

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Uncertain evaluation of crashworthiness of thin-walled composite structures

Aircraft Engineering and Aerospace Technology ◽

10.1108/aeat-03-2017-0081 ◽

2018 ◽

Vol 90 (8) ◽

pp. 1238-1248 ◽

Cited By ~ 4

Author(s):

Jiang Xie ◽

Haolei Mou ◽

Xuan Su ◽

Zhenyu Feng

Keyword(s):

Finite Element ◽

Energy Absorption ◽

Composite Structures ◽

Evaluation Method ◽

Uncertain Parameters ◽

Material System ◽

Content Type ◽

Circular Tubes ◽

Thin Walled ◽

Absorption Characteristics

Purpose This paper aims to present an evaluation method for energy-absorption characteristics of thin-walled composite structures with random uncertain parameters. Design/methodology/approach The mechanical properties of T700/3234 are obtained by material performance tests and energy-absorption results are obtained by quasi-static crushing tests of thin-walled composite circular tubes. The indicators of triggering specific load (TSL) and specific energy absorption (SEA) are introduced and calculated to determine the energy-absorption characteristics and validate the probability finite element analysis model. The uncertainty in the parameters contain the machining tolerance for the thickness and inner diameter of composite circular tubes and are associated with the composite material system. The Plackett–Burman method is used to choose the measurement parameters. Then, the response surface method is used to build a second-order function of random uncertain parameters versus TSL/SEA, and the Monte Carlo method is finally used to obtain the probabilities of TSL and SEA. Findings The finite element models can accurately simulate the initial peak load, load-displacement curve and SEA value. The random uncertain parameter method can be used to evaluate the energy-absorption characteristics of thin-walled composite circular tubes. Practical implications The presented evaluation method for energy-absorption characteristics of thin-walled composite structures is an approach that considers uncertain parameters to increase the simulation accuracy and decrease the computational burden. Originality/value This methodology considers uncertain parameters in evaluating the energy-absorption characteristics of thin-walled composite structures, and this methodology can be applied to other thin-walled composite structures.

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