The Stresses in Cemented Joints

Goland, Martin; Reissner, E.

doi:10.1115/1.4009336

Cited by 1,375 publications

(237 citation statements)

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“…Linear regression analyses of the responses of the MOFBG sensors to tensile loading F result in sensor sensitivities expressed in pm/kN. The theoretical model of Goland-Reissner [6] is used to relate the applied load to the shear stress at the position of the sensor, while the low amount of peel stress present at the sensor location is neglected. This allows calculating the shear stress sensitivity, expressed in pm/MPa.…”

Section: Shear Stress Sensing With a Butterfly Mofbg Sensor In Different Adhesive Bond Configurationsmentioning

confidence: 99%

“…However, peel stress also becomes larger near the edges. There are nevertheless two specific locations closer to the edge at which peel stress is nearly zero, while shear stress is higher than in the centre of the adhesive [6]. In our experiments we opted to integrate the sensors at these locations (Figure 2).…”

Section: Shear Stress Sensing With a Butterfly Mofbg Sensor In Different Adhesive Bond Configurationsmentioning

confidence: 99%

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Fiber Bragg grating-based shear strain sensors for adhesive bond monitoring

et al. 2014

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The application of shear stress sensors in structural health monitoring remains limited because current sensors are either difficult to implement, they feature a low measurement resolution or the interrogation of the output signal is complex. We propose to use fiber Bragg grating-based sensors fabricated in dedicated highly birefringent microstructured optical fibers. When embedded in a host material, the orientation angle of the fiber should be chosen such that their polarization axes are aligned parallel with the direction of maximum shear stress when the host is mechanically loaded. We present experimental results of sensors embedded in the adhesive layer of single lap and double lap structural joints. These tests demonstrate that when the joints are tension loaded, the embedded sensors have a shear stress sensitivity of around 60 pm/MPa. We study the influence of the adhesive material on the sensor response, as well as the influence of sensor orientation and location in the bond line. Finally, we demonstrate the minimal thermal cross-sensitivity of the shear stress sensitivity of this sensor.

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Section: Shear Stress Sensing With a Butterfly Mofbg Sensor In Different Adhesive Bond Configurationsmentioning

confidence: 99%

Section: Shear Stress Sensing With a Butterfly Mofbg Sensor In Different Adhesive Bond Configurationsmentioning

confidence: 99%

Fiber Bragg grating-based shear strain sensors for adhesive bond monitoring

et al. 2014

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“…Golland and Reissner [2] recognized from their laboratory experiments that the bending of the substrates had an apparent effect on the strength of the adhesive joint. They also assumed that the adhesive and the substrates behave as linear elastic and express the effect of the bending of the substrates in their bending moment factor, k [2]:…”

Section: Golland and Reissner's Analysismentioning

confidence: 99%

Mixed Mode Fracture Analysis of the Lap Shear Specimen Test Per ASTM D1002

Yeh

Tandjung

2005

Journal of Reinforced Plastics and Composites

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ASTM D1002 is a standard test method used to evaluate the shear strength of adhesives. This method is popular due to the simplicity of the test, ease to replicate, and the consistency of the testing results. However, this test is also the most criticized one, as the results can be too misleading to be used as design criteria. Due to the material elastic mismatch and the eccentricity of the test setup, a mixed mode loading is introduced to the adhesive joint. This paper presents a detailed study on the behavior of the adhesive joint under the shear loading, tested by the ASTM D1002 method. The conventional fracture mechanics theory is utilized. A crack embedded in the adhesive joint specimens, including both the single thickness and the double thickness, are used for the analysis. The specimen is loaded on a tensile test machine until failure, and the load and displacement are recorded for each specimen. The result from the experiment is used as the data for the stress and fracture mechanics analysis. From the experimental results, it is seen that the specimen also experiences out-of-plane tensile stress. There is an indication that the final failure might be due to cleavage loading, for the double thickness. The eccentricity of the loading path cannot be eliminated completely. The results of the experiment and the effect of the mixed mode loading are studied in detail. This paper provides a better understanding of the behavior of adhesives under a mixed-mode fracture. This knowledge is beneficial to understand and design reliable adhesive bond joints.

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“…J OINING IS CRITICAL to the manufacturer of aerospace structures. With wide use of advanced thermoplastic composites for structural application, there is a need 1 Author to whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the stresses in adhesive layer are not, in practice, uniform because of the eccentricity of the loading path, i.e., parallel to load, but not in a line. Goland and Reissner [1] recognized, from laboratory experiments with lap joints, a pronounced bending effect upon the stress distribution in the joint itself.…”

mentioning

confidence: 99%

Innovative Fatigue Method in Single-Lapped Mixed Composite Joints

Lin

Jen

2001

Journal of Reinforced Plastics and Composites

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The aim of the work is to systematically investigate the mechanical properties of single-lapped mixed, i.e., bolted and bonded and riveted and bonded, composite joints subjected to tension-tension (T-T) cyclic loading by using the new model grips in comparison with that by conventional MTS grips. A system of devices to measure clamping force is disclosed. The U.S. patent new model grips are introduced and manufactured to conduct cyclic tests and generate empirical results, highlighted as follows. Through the parametric study we find that the obtained fatigue strength and life of the mixed joint by MTS grips are larger than that by new model grips, i.e., the real values are over-estimated by MTS grips. Our data by new model grips are correct. The bolted and bonded joint is found stronger than the riveted and bonded joint mainly attributed to the features of respective mechanical fastening. The mixed joint of cross-ply adherend is more resistant to cyclic loading than that of quasi-isotropic adherend. Additionally, the overlap length and clamping force are two dominant factors in fatigue strength and life. The increase in overlap length of a mixed joint will increase the fatigue strength and life until an asymptotical value is approached. Similarly, the increase of clamping force will result in a rigid joint to possess more resistance to cyclic loading.

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The Stresses in Cemented Joints

Cited by 1,375 publications

References 0 publications

Fiber Bragg grating-based shear strain sensors for adhesive bond monitoring

Fiber Bragg grating-based shear strain sensors for adhesive bond monitoring

Mixed Mode Fracture Analysis of the Lap Shear Specimen Test Per ASTM D1002

Innovative Fatigue Method in Single-Lapped Mixed Composite Joints

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