Study on the fatigue experiment of TDCB aluminum foam specimen bonded with adhesive

This paper studies the characteristics of junction structure of closed-cell type aluminum foam, which is generally used as a shock absorber. TDCB specimens were designed for mode III type with thickness as a variable and performed a fatigue experiment on them by thickness. As the result, the load value of all specimens peaks under 0 to 25 cycles and decreases as the cycles increase. As the specimen thickens by 10 mm, the maximum load value is 1.2 times. When the thickness increases by 20 mm, the maximum value increases by 1.5 times. This study result can be utilized by investigating the mechanical characteristics of TDCB specimens for mode III type under fatigue loading conditions systematically and efficiently.

Section: Introductionmentioning

confidence: 99%

A Fatigue Fracture Study on TDCB Aluminum Foam Specimen of Type Mode III Bonded with Adhesive

Lee

Cho

2017

“…7. Stresses due to the elapsed times at all cases of [1][2][3][4][5][6] As analysis result, Fig. 8 shows the graph of minimum internal energies due to the elapsed times at all cases of 1-6.…”

Section: Study Model and Methodsmentioning

confidence: 99%

“…Particularly, the fuel efficiency can be improved through weight reduction of the car body, for which new materials such as CFRP, aluminum alloys and magnesium alloys are frequently applied [1][2][3][4][5]. Since such a weight reduction of the car body should be realized with the stability being secured against collision, the car body design should be realized by investigating impact characteristics due to the impact of car body occurring at collision [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Impact Characteristic According to the Structure of Crash Box at the Vehicle

Min

Cho

2017

The crash box between a bumper and a car body in automobiles can reduce impacts for car bodies with a bumper at a low-speed collision by preventing the shocks. Also, this crash box is the part playing a very important role for the safety of vehicle and the reduction of repair cost, and many studies have been investigated for the performance. In this study, aluminum foam was inserted in an aluminum crash box to analyze the relationships of deformation, stress and internal energy. The compression characteristics are compared with six cases. In addition, the load due to displacement at experiment for a case is verified by modeling with finite elements and performing the structural analysis. As these study results for investigating characteristics of the crash box, it is thought that the effective designs of crash box to enhance the durability for collision are made possible.

“…Adhesive fracture energy is calculated from the formulae of British standards. Based on the correlation obtained from this study, the analysis of fracture behavior is carried out and aluminum foam bonded by using adhesive is applied to the actual composite structure to analyze mechanical characteristic and fracture property [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study On Fracture Property Of Tapered Double Cantilever Beam Specimen With Aluminum Foam

Kim¹,

Kim²,

Cho³

2015

It is indispensable to evaluate fracture energy as the bonding strength of adhesive at composite material with aluminum foam. This specimen is designed with tapered double cantilever beam by British standards (BS 7991 and ISO 11343). 4 kinds of specimens due to m values of 2, 2.5, 3 and 3.5 are manufactured and compared each other with the experimental results. Adhesive fracture energy is calculated from the formulae of British standards. The value of m is the gradient which is denoted as the length and the height of specimen. As m becomes greater at static experimental result, the maximum load becomes higher and the displacement becomes lower. And the critical fracture energy becomes higher. As m becomes less at fatigue experimental result, the displacement becomes higher and the critical fracture energy becomes higher. Fracture behavior of adhesive can be analyzed by this study and these experimental results can be applied into real field effectively. The stability on TDCB structure bonded with aluminum foam composite can be predicted by use of this experimental result. Adhesive fracture energy is calculated from the formulae of British standards. Based on correlations obtained in this study, the fracture behavior of bonded material would possibly be analyzed and aluminum foam material bonded with adhesive would be applied to a composite structure in various fields, thereby analyzing the mechanical and fracture characteristic of the material.