scholarly journals Material Model Effect for Simulating a Single-Lap Joint with a Blind Rivet

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7236
Author(s):  
Monika Lubas ◽  
Arkadiusz Bednarz
Keyword(s):  
Load Capacity ◽  
Material Model ◽  
Experimental Results ◽  
Strength Analysis ◽  
Elastic Model ◽  
Lap Joint ◽  
Material Models ◽  
Single Lap Joint ◽  
Pressure Stress ◽  
Analytical Tools

This paper concerns the influence of the material modeling method on the results of strength analyses. The research object was a single lap joint with a blind rivet (ISO 12996). The results of numerical strength analysis for various configurations of material models with material and contact nonlinearity were compared not only with the experimental results of such a connection but also with the values estimated using classical analytical tools (pressure stress and Hertz stress). The research aimed to determine how the results of numerical analyses (FEMs) were influenced by the method of modeling the material model and how it relates to the experimental results. As part of the analyses, a discrete riveted model and material models were constructed. The analyses took into account various load cases (from 10 to 90% of the connection capacity) to better illustrate the relationship between the numerical and experimental results. As a result of the conducted analyses, it was determined that the linear-elastic model was an acceptable and suggested solution (with a load of up to 90% of the load capacity of the joint connection) for further tests. The work was summarized with general and specific conclusions relating to all cases of numerical modeling. In addition, the summary includes suggestions for future works.

Optimization of Adhesively Bonded Single Lap Joints by Tapering of Adherends

2002 ◽  
Author(s):  
Prasad Nirantar ◽  
Erol Sancaktar
Keyword(s):  
Lap Joints ◽  
Material Behavior ◽  
Experimental Results ◽  
Shear Stresses ◽  
Lap Joint ◽  
Adhesively Bonded ◽  
Single Lap Joints ◽  
Single Lap Joint ◽  
Joint Deformation ◽  
Normal And Shear Stresses

The effect of tapering the ends of the adherend on the joint strength and joint deformation behavior of the single lap joint geometry was studied. First, the joints were geometrically modeled using finite element (FE) techniques involving linear, as well as nonlinear (bilinear) material behavior. Then, the FEA results were compared with the experimental results for different configurations of the single lap joints, and the FEA results were found to be consistent with the experimental results with the normal and shear stresses significantly decreasing in the modified geometries over those in unmodified geometries leading to increased loading capacity in modified joints, especially with small-angle taper (~10°).

scholarly journals Plasticity Modelling in PM Steels

2017 ◽  
Vol 17 (1) ◽  
pp. 29-36
Author(s):  
M. Andersson ◽  
V. Angelopoulos
Keyword(s):  
Porous Materials ◽  
Indentation Test ◽  
Material Model ◽  
Experimental Results ◽  
Material Models ◽  
Advanced Material ◽  
Material Data

Abstract Simulations are continuously becoming more and more important to predict the behaviour of materials, components and structures. Porous materials, such as PM, put special demands on the material models used. This paper investigates the application of the Gurson material model to PM steels. It is shown how the model can be calibrated to material data. The results are also applied to an indentation test, where it’s demonstrated that experimental results can be reproduced with some accuracy. Limitations of the model, and the potential to use more advanced material models are also discussed.

scholarly journals Strain Rate Dependent Constitutive Modelling of 3D Printed Polymers

2021 ◽  
Vol 250 ◽  
pp. 02029
Author(s):  
Maria Lißner ◽  
Daniel Thomson ◽  
Nik Petrinic ◽  
Jeroen Bergmann
Keyword(s):  
Strain Rate ◽  
Large Deformations ◽  
Material Model ◽  
Constitutive Modelling ◽  
Experimental Results ◽  
Good Representation ◽  
Material Models ◽  
Rate Dependent ◽  
3D Printed ◽  
Dependent Behaviour

Experimental results from 3D printed TPC (thermoplastic copolyester) compression specimens were used to develop a combined experimental-numerical framework to support the design of e.g. 3D printed mouthguards. First, a commercially available material model capable of representing the strain-rate dependent behaviour of materials undergoing large deformations is identified. Second, experimental results from solid 3D printed compression specimens are used to calibrate the identified material models. Third, 3D printed compression specimens with two different cavity geometries are used to assess the ability of the material model to accurately reproduce the experimental observations. The numerical investigation indicates a good representation of the strain rate dependent experimental results of 3D printed specimens.

scholarly journals Experimental Investigation of Single Lap Joint on Composite Materials

2021 ◽  
pp. 1304-1309
Author(s):  
S. Rajkumar ◽  
Dr. M. Loganathan ◽  
Dr. R. Venkatesh
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Testing Machine ◽  
Basalt Fiber ◽  
Lap Joints ◽  
Strength Analysis ◽  
Lap Joint ◽  
Single Lap Joint ◽  
And Performance ◽  
Riveted Lap Joints

To improve the efficiency and performance can be achieved by decreasing the aircraft weight through considerable usage of composite material in primary aircraft structures. In fuselage construction it consist of various structural members such as skin, stringers, frames, bulkheads etc., all fastened together by rivets and bolts. The failure of riveted joint take place when tearing of the plate, shearing of rivets and plate under the action of over load. This project deals with the tensile strength analysis of riveted lap joints of three different composite materials such as Glass fiber, Basalt fiber and Carbon fiber are reinforced with epoxy resins. By using universal testing machine the tensile strength of the riveted single lap joint of three different composite materials are tested experimentally.

Kekuatan Sambungan AL/CFRP Menggunakan Adhesif Epoksi/Serbuk-AL dengan Variasi Pressure Level

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Bi Asngali
Keyword(s):  
Pressure Level ◽  
Lap Joint ◽  
Single Lap Joint ◽  
Al 2024

 Penelitian ini bertujuan untuk menyelidiki pengaruh pressure level terhadap kekuatan geser sambungan single lap joint (SLJ) antara Al 2024 dan CFRP dengan adesif epoksi/serbuk Al. Variasi pressure level yang digunakan adalah 0,6; 0,7; 0,8; 0,9 dan 1 MPa. Pembuatan dan pengujian spesimen uji geser mengacu pada ASTM D 1002. Hasil penelitian menunjukkan bahwa pressure level dapat meningkatkan kekuatan geser sambungan. Pada variabel pressure level terbaiknya yaitu 0,9 MPa menghasilkan kekuatan geser tertinggi (8,59 MPa). Pada kondisi tersebut, penampang patahan menunjukkan jenis kegagalan kombinasi antara kegagalan cohesive, light fiber tear dan fiber-tear.Kata kunci— pressure level; epoksi/serbuk-Al; kekuatan geser; single lap joint .

Experimental and FEA Evaluation of Hybrid Joint Strength of Single Lap joint

2011 ◽  
Vol 1 (9) ◽  
pp. 93-96
Author(s):  
S. S. Kadam S. S. Kadam ◽  
◽  
P. A. Dixit P. A. Dixit
Keyword(s):  
Joint Strength ◽  
Lap Joint ◽  
Single Lap Joint ◽  
Hybrid Joint

scholarly journals Variation of Passive Biomechanical Properties of the Small Intestine along Its Length: Microstructure-Based Characterization

2021 ◽  
Vol 8 (3) ◽  
pp. 32
Author(s):  
Dimitrios P. Sokolis
Keyword(s):  
Small Intestine ◽  
Orientation Angle ◽  
Axial Direction ◽  
Material Model ◽  
Biomechanical Properties ◽  
Intestinal Wall ◽  
Model Parameters ◽  
Material Models ◽  
Hyper Elastic ◽  
Rat Tissue

Multiaxial testing of the small intestinal wall is critical for understanding its biomechanical properties and defining material models, but limited data and material models are available. The aim of the present study was to develop a microstructure-based material model for the small intestine and test whether there was a significant variation in the passive biomechanical properties along the length of the organ. Rat tissue was cut into eight segments that underwent inflation/extension testing, and their nonlinearly hyper-elastic and anisotropic response was characterized by a fiber-reinforced model. Extensive parametric analysis showed a non-significant contribution to the model of the isotropic matrix and circumferential-fiber family, leading also to severe over-parameterization. Such issues were not apparent with the reduced neo-Hookean and (axial and diagonal)-fiber family model, that provided equally accurate fitting results. Absence from the model of either the axial or diagonal-fiber families led to ill representations of the force- and pressure-diameter data, respectively. The primary direction of anisotropy, designated by the estimated orientation angle of diagonal-fiber families, was about 35° to the axial direction, corroborating prior microscopic observations of submucosal collagen-fiber orientation. The estimated model parameters varied across and within the duodenum, jejunum, and ileum, corroborating histologically assessed segmental differences in layer thicknesses.

scholarly journals Application of the Point Stress Criterion to Assess the Bond Strength of a Single-Lap Joint

2014 ◽  
Vol 46 (4) ◽  
pp. 518-525
Author(s):  
K. S. Sajikumar ◽  
N. Asok Kumar ◽  
B. Nageswara Rao
Keyword(s):  
Bond Strength ◽  
Lap Joint ◽  
Stress Criterion ◽  
Single Lap Joint
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