Research on Tensile Strength of Wood Single Lap Gluing Joint

2011 ◽  
Vol 121-126 ◽  
pp. 351-354
Author(s):  
Wei Lu ◽  
Ying Cheng Hu ◽  
Jun Shen ◽  
Jia Yao ◽  
Jin Li
Keyword(s):  
Tensile Strength ◽  
Tensile Load ◽  
Lap Joints ◽  
Specimen Thickness ◽  
Single Lap Joints ◽  
Specimen Width ◽  
Experiment Method ◽  
Joint Quality

The tensile strength of joints is one of the most important indexes which can affect joint quality. The effect of gluing length, specimen width and thickness of wood single lap joints on the maximum tensile load and tensile strength has been researched through the experiment method. The maximum tensile load increases with the increase of gluing length, specimen width and thickness, but the increase degrees are different; the tensile strength is consistent with the increase of gluing length, but does not change obviously with the increase of specimen width and even decreases with the increase of specimen thickness. The conclusions of this paper will have guiding significance for the design of wood single lap joints.

Distribution des contraintes dans les assemblages collés :

1996 ◽  
Vol 84 ◽  
pp. 47-56
Author(s):  
B. Fargette ◽  
Y. Gilibert ◽  
L. Rimlinger
Keyword(s):  
Test Specimen ◽  
Testing Machine ◽  
Tensile Load ◽  
Expansion Method ◽  
Lap Joints ◽  
Experimental Results ◽  
Stress Fields ◽  
Lap Joint ◽  
Single Lap Joints ◽  
Linear Behaviour

We have studied the agreement between theoretical computations and experimental results of surface strains of bonded joints of two types : tenon and mortise, and single-lap joints, for different lengths of the lap. For instance, with the single-lap joint, we have tested four lengths of the overlap from 14 mm to 88 mm. Surface strains are measured by an extensometrical method with electrical gauges, when the specimen is loaded in uniaxial traction on a universal testing machine. Experimental results and computations made by an improved method like the asymptotic expansion method agree, but only if the global traction load applied on the specimen is low, or if the overlap in respect with the others dimensions of the section of test specimen is long. In these joints, effectively, stress fields are disrupted near the butts and become very difficult to compute. Actually, near the ends of the overlap, stresses can reach high limits with only low global load applied on the test specimen. With a short length of the overlap, linear behaviour disappears almost totally because of a strong interaction of the two perturbed fields. On the contrary, with a high length of overlap, stress fields become linear on the major part of the overlap , even with a high tensile load applied on the specimen. So, the length of the overlap has a great effect on the linear behaviour of the joint.

Effect of Adherend Recessing on the Tensile Strength of Single Lap Joints

2014 ◽  
Vol 90 (8) ◽  
pp. 649-666 ◽  
Author(s):  
A. M. G. Pinto ◽  
N. F. Q. R. Ribeiro ◽  
R. D. S. G. Campilho ◽  
I. R. Mendes
Keyword(s):  
Tensile Strength ◽  
Lap Joints ◽  
Single Lap Joints

Taguchi-Based ANN Predictions to Analyze the Tensile Strength of Adhesive-Bonded Single Lap Joints

2018 ◽  
Vol 7 (1) ◽  
pp. 20180006
Author(s):  
G. Ravichandran ◽  
G. Rathnakar ◽  
Pinto Ratan ◽  
John Joshy ◽  
Suresh Vishal
Keyword(s):  
Tensile Strength ◽  
Lap Joints ◽  
Single Lap Joints

Study on Tensile Strength of Composite Double-Lap Joint

2012 ◽  
Vol 157-158 ◽  
pp. 1519-1526 ◽  
Author(s):  
Sui Liu ◽  
Zhi Dong Guan ◽  
Xia Guo ◽  
Dong Xiu Yan ◽  
Ping Chen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Shear Strain ◽  
Analytical Model ◽  
Shear Failure ◽  
Tensile Load ◽  
Lap Joints ◽  
Plastic Behavior ◽  
Finite Model ◽  
Lap Joint ◽  
Maximum Shear Strain

An experimental and analytical study on ultimate tensile strength of composite double-lap joints with different adhesive thicknesses is employed in the paper，test results indicate the major failure mode of joints is adhesive shear failure and the ultimate strength of joints increasing with thicker adhesive. Analytical model is developed to investigate the adhesive failure of double-lap joint based on the experiments. The model takes into account anisotropy of each ply in the composite laminates and elastic-perfectly plastic behavior of the adhesive in the joints. The validity of analytical model for calculating shear strain/stress distribution is certified by comparing with finite model results. Maximum shear strain criterion is adopted in the analytical model to predict the ultimate tensile load of double-lap joint. Good agreement of the analytical predictions with the experimental results is obtained.

Experimental Study on Specimen and Grain Size Effects in Uniaxial Tension Test of Aluminum Foil

2007 ◽  
Vol 344 ◽  
pp. 777-782 ◽  
Author(s):  
J. Zhou ◽  
De Bin Shan ◽  
Bin Guo ◽  
D.L. Ma
Keyword(s):  
Grain Size ◽  
Tensile Strength ◽  
Uniaxial Tension ◽  
Thin Sheet ◽  
Testing Machine ◽  
Tension Test ◽  
Specimen Thickness ◽  
Thin Wall ◽  
Uniaxial Tension Test ◽  
Specimen Width

With the rapidly growing demand for the micro-thin-wall parts, the development of high accurate forming processes for very thin sheet or foil becomes more and more important. The aim of this study is to explore the effects of specimen width and grain size on tensile strength of aluminum alloy 3003 foil in uniaxial tension test. The problem was approached in two ways: firstly, by reduction of the specimen width, and secondly, by changing the grain size through annealing crystallization. The uniaxial tension tests were performed on an electronic universal material testing machine, in which a linear CCD based visual extensometer was used to measure deformation. The results show that the tensile strength decreases with decreasing specimen width or increasing surface-to-volume ratio. The tensile strength decreases with decreasing grain size for grain sizes larger than the specimen thickness.

Numerical Analysis of Co-Cured Composite Single Lap Joint with Spew Fillets

2011 ◽  
Vol 279 ◽  
pp. 219-223
Author(s):  
Guo Hua Zhao ◽  
Qing Lian Shu ◽  
Bo Sheng Huang
Keyword(s):  
Finite Element ◽  
Tensile Load ◽  
Lap Joints ◽  
Finite Element Code ◽  
Lap Joint ◽  
Single Lap Joints ◽  
Single Lap Joint ◽  
Static Tensile ◽  
The Subject ◽  
Failure Location

Spew fillet is common in co-cured composite single lap joint. It plays an important role in the safety of the joint. But few attentions were paid to the subject in former investigations. In this paper, co-cured composite single lap joints with spew fillets under static tensile load were investigated numerically using the commercial finite element code ANSYS. The submodeling technique was employed to overcome the problem caused by extra aspect ratio of elements. The computation results indicated that the existence of spew fillets will not change the possible failure location, but will improve the anti-failure performance of single lap joint.

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