A study on the failure behavior of Al2O3-Ni micro-layered beams under three point bending

2020 ◽  
Vol 110 ◽  
pp. 102773
Author(s):  
Mengwen Zhang ◽  
Xudong Sun ◽  
Xiaozhi Hu
Keyword(s):  
Failure Behavior ◽  
Three Point Bending ◽  
Layered Beams

scholarly journals Deformation and Failure Behavior of Wooden Sandwich Composites with Taiji Honeycomb Core under a Three-Point Bending Test

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2325 ◽  
Author(s):  
Jingxin Hao ◽  
Xinfeng Wu ◽  
Gloria Oporto ◽  
Jingxin Wang ◽  
Gregory Dahle ◽  
...  
Keyword(s):  
Shear Failure ◽  
Dominant Role ◽  
Honeycomb Structure ◽  
Structure Design ◽  
Bending Test ◽  
Failure Behavior ◽  
Sandwich Composites ◽  
Honeycomb Core ◽  
Deformation And Failure ◽  
Three Point Bending

A new type of Taiji honeycomb structure bonded outside with wood-based laminates was characterized from a mechanical standpoint. Both theoretical and experimental methods were employed to analyze comprehensively the deformation behavior and failure mechanism under a three-point bending test. The analytical analysis reveals that a Taiji honeycomb has 3.5 times higher strength in compression and 3.44 times higher strength in shear compared with a traditional hexagonal honeycomb. Considering the strength-weight issue, the novel structure also displays an increase in compression strength of 1.75 times and shear strength of 1.72 times. Under a three-point bending test, indentation and core shear failure played the dominant role for the total failure of a wooden sandwich with Taiji honeycomb core. Typical face yield was not observed due to limited thickness-span ratio of specimens. Large spans weaken the loading level due to the contribution of global bending stress in the compressive skin to indentation failure. A set of analytical equations between mechanical properties and key structure parameters were developed to accurately predict the threshold stresses corresponding to the onset of those deformation events, which offer critical new knowledge for the rational structure design of wooden sandwich composites.

Interlaminar failure behavior of GLARE laminates under short-beam three-point-bending load

2016 ◽  
Vol 97 ◽  
pp. 361-367 ◽  
Author(s):  
Cheng Liu ◽  
Dandan Du ◽  
Huaguan Li ◽  
Yubing Hu ◽  
Yiwei Xu ◽  
...  
Keyword(s):  
Failure Behavior ◽  
Three Point Bending ◽  
Short Beam ◽  
Bending Load

Strength of Three-Point-Bending Ductile Adhesive Joint with Dissimilar Adherents

2014 ◽  
Vol 554 ◽  
pp. 406-410
Author(s):  
S. Nurhashima ◽  
Mohd Afendi ◽  
Basirom Izzawati ◽  
N.A.M. Amin ◽  
M.S. Abdul Majid ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Adhesive Joint ◽  
Adhesive Bonding ◽  
Failure Behavior ◽  
Three Point Bending ◽  
Different Types ◽  
Adhesive Thickness

In this study, an experimental investigation was conducted in order to determine the effect of different adhesive thickness (i.e., 0.1, 0.5, 0.7 and 1 mm) on strength of ductile adhesive joint. The study scope covers both experiment and analysis. In particular, two different types of material, aluminum and stainless steel as adherents were used and joined by using a specific adhesive jig. By using universal tensile machine (UTM), three-point-bending (3PB) test was conducted. To obtain the result from the experiment, continuous load is applied to the adhesive until the adhesive become fracture. The result obtained has enabled the clarification of failure behavior mechanisms and characteristics of adhesive bonding.

scholarly journals The Contribution to the Development of a Two-Dimensional Asymptotic Theory of the Three-Point Bending Behaviour of Multi-Layered Beams: Applications to Orthotropic Phase Sandwich Beams

2020 ◽  
Vol 5 (10) ◽  
pp. 1191-1198
Author(s):  
A. D. Pagui ◽  
A. E. Foudjet ◽  
J. S. T. Mabekou ◽  
T. R. S. N. Ekoume ◽  
P. K. Talla
Keyword(s):  
Asymptotic Method ◽  
Asymptotic Theory ◽  
Asymptotic Methods ◽  
Small Variation ◽  
Second Order ◽  
Sandwich Beams ◽  
Two Dimensional ◽  
Three Point Bending ◽  
Layered Beams ◽  
Bending Behaviour

The objective of this work is to present a methodology for analyzing the behavior in bending of the structure of sandwich beams base on the second order of asymptotic method. This work is in continuation with the work of Talla [1]. This work includes the knowledge of all the physical elastic constant of the sandwich beams. This result confirms the fact that the second order of asymptotic method doesn’t bring a significative change in the behavior of the solution until a certain point. The curves have been obtained by the software named python. This result was predictable because the asymptotic methods deal with small variation due to the presence of the epsilon parameter, which is very small.

Damage and Fracture Behavior of Cancellous Bone in the Femoral Head

2008 ◽  
Vol 33-37 ◽  
pp. 1043-1048
Author(s):  
Xue Feng Yao ◽  
P. Wang ◽  
H.Y. Yeh
Keyword(s):  
Femoral Head ◽  
Cancellous Bone ◽  
Fracture Behavior ◽  
Correlation Method ◽  
Initial Crack ◽  
Failure Behavior ◽  
Digital Speckle Correlation Method ◽  
Three Point Bending ◽  
Speckle Correlation ◽  
Damage And Fracture

The fracture is an important failure behavior of cancellous bone. Three-point-bending experiment was used to study fracture behavior of cancellous bone. Three group specimens were taken from two human femoral head and there was a non-angled crack and an angled crack in every group respectively. By using Digital Speckle Correlation Method (DSCM), the displacement and strain field were obtained at the crack-tip and the full specimen. The initial crack path was always at the maximal strain location and could be predicted by the DSCM. In the macro-scope, the crack propagation paths towards the load tip, and are independent of the initial crack angle.

scholarly journals Electric Current Dependent Fracture in GaN Piezoelectric Semiconductor Ceramics

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2000 ◽  
Author(s):  
Guoshuai Qin ◽  
Chunsheng Lu ◽  
Xin Zhang ◽  
Minghao Zhao
Keyword(s):  
Electric Current ◽  
Fracture Criterion ◽  
Electric Displacement ◽  
Failure Behavior ◽  
Intensity Factors ◽  
Reliability Design ◽  
Piezoelectric Semiconductor ◽  
Three Point Bending ◽  
Key Factor ◽  
Piezoelectric Semiconductors

In this paper, the fracture behavior of GaN piezoelectric semiconductor ceramics was investigated under combined mechanical and electric loading by using three-point bending tests and numerical analysis. The experimental results demonstrate that, in contrast to traditional insulating piezoelectric ceramics, electric current is a key factor in affecting the fracture characteristics of GaN ceramics. The stress, electric displacement, and electric current intensity factors were numerically calculated and then a set of empirical formulae was obtained. By fitting the experimental data, a fracture criterion under combined mechanical and electrical loading was obtained in the form of an ellipsoid function of intensity factors. Such a fracture criterion can be extended to predict the failure behavior of other piezoelectric semiconductors or devices with a crack, which are useful in their reliability design and applications.

Bending Failure Behavior of Recycled Aluminum Reinforced Composites

2001 ◽  
Author(s):  
Brian M. June ◽  
Ramana M. Pidaparti ◽  
Hazim El-Mounayri
Keyword(s):  
Bending Stiffness ◽  
Sandwich Composite ◽  
Failure Behavior ◽  
Composite Panels ◽  
Reinforced Composites ◽  
Bending Tests ◽  
Three Point Bending ◽  
Specific Objective ◽  
Aluminum Cans ◽  
Bending Failure

Abstract In order to effectively use the recycled aluminum cans, many applications of aluminum are being explored. One of the most obvious applications is to reinforce with wood or others, to form sandwich composites. The goal of the proposed work is to conduct the research to develop constructional products, which would permit reuse of aluminum cans instead of destroying the structure by melting or trashing. With that goal in mind, our specific objective of this study is to evaluate the stiffness and failure behavior of recycled aluminum reinforced composites under three-point bending for use in composite industries. Composite specimens containing the end sections of the can sandwiched between top and bottom layers of wood are investigated. The results of bending stiffness and failure behavior of sandwich composite panels obtained from the three-point bending tests are presented and discussed.

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