Next Article in Journal
Cognitive Assistants—An Analysis and Future Trends Based on Speculative Default Reasoning
Previous Article in Journal
A Hydraulic Semi-Active Suspension Based on Road Statistical Properties and Its Road Identification
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Appl. Sci. 2018, 8(5), 741; https://doi.org/10.3390/app8050741

Failure Pattern Transition of Shape Memory NiTi Foam Subjected to Compression: From Quasi-Static to Dynamic

Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124, China
*
Author to whom correspondence should be addressed.
Received: 22 April 2018 / Revised: 4 May 2018 / Accepted: 5 May 2018 / Published: 8 May 2018
(This article belongs to the Section Materials)
View Full-Text   |   Download PDF [2828 KB, uploaded 8 May 2018]   |  

Abstract

Shape memory alloy can recover its original configuration, while lightweight foam can absorb a considerable amount of energy. It is desirable to test whether shape memory foam has merits in terms of both shape memory effect and exceptional energy absorption capacity. In the present study, shape memory NiTi foam is compressed quasi-statically and dynamically in order to investigate its response and failure pattern transition with an increasing loading rate. A universal testing machine is used in a quasi-static test, while the split Hopkinson pressure bar is employed in the dynamic test. It is observed that the NiTi foam fails differently: under a quasi-static load, small foam parts of various sizes fall off from the specimen fringe; meanwhile, under dynamic load, the foam fractures in the specimen center to split it into multiple pieces. The underlying failure mechanisms accounting for the shape memory foam behavior under different loading rates are discussed. View Full-Text
Keywords: shape memory alloy; foam; dynamic load; failure pattern; recovery capacity shape memory alloy; foam; dynamic load; failure pattern; recovery capacity
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Wang, X.; Zhou, H. Failure Pattern Transition of Shape Memory NiTi Foam Subjected to Compression: From Quasi-Static to Dynamic. Appl. Sci. 2018, 8, 741.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top