Experimental study on the fatigue crack propagation behavior of DCB specimen with aluminum foam

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

“…As static and fatigue behaviors at DCB specimen are investigated experimentally, these mechanical properties of this specimen are understood through this study. The results obtained through the present study would serve as basic data in ensuring safety and durability of the structures [6][7][8][9][10][11]. As seen in Fig.…”

Section: Introductionmentioning

confidence: 94%

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

Kim¹,

Choi²,

Cho³

2015

This study aims to investigate double cantilever beam specimen with aluminum foam bonded by spray adhesive to investigate the fracture strength of the adhesive joint experimentally. The fracture energy at opening mode is calculated by the formulae of British Engineering Standard (BS 7991) and International Standard (ISO 11343). For the static experiment, four types of specimens with the heights (h) of 25 mm, 30 mm, 35 mm and 40 mm are manufactured and the experimental results are compared with each other. As the height becomes greater, the fracture energy becomes higher. After the length of crack reaches 150 mm, the fracture energy of the specimen (h=35 mm) is greater than that of the specimen (h=40 mm). Fatigue test is also performed with DCB test specimen. As the height decreases, the fracture energy becomes higher. By the result obtained from this study, aluminum foam with adhesive joint can be applied to actual composite structure and its fracture property can possibly be anticipated.

“…Composite materials are composed of matrix and another material. Fatigue crack propagates slow or fast by another material with the different property near crack tip [5][6][7][8][9]. This paper investigates the fatigue property when the fatigue crack propagates between other materials.…”

Section: Introductionmentioning

confidence: 99%

A Study on Propagation Property of Fatigue Crack at Composite with Another Material

Choi

Cho

2017

In this study, the fatigue crack propagation in composite material is investigated by experimental result. When another material exists at fatigue crack propagation in case of composite, the durability against fatigue crack is smaller or greater than in case of matrix without another material. As another material is composite material, it refers to steel or material. Another material influences the crack propagation. As the experimental results can be agreed with simulation data, all experimental data in this study are verified. These experimental and analysis results can be applied into real field effectively. The estimation of safety design and life will be of great value industrially.