scholarly journals Design of composite materials by using intelligent finite element method. Part 1 Determination of component of laminates based on failure criteria.

1991 ◽  
Vol 40 (450) ◽  
pp. 303-307 ◽  
Author(s):  
Masaru ZAKO ◽  
Tetsuya TSUJIKAMI
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Composite Materials ◽  
Failure Criteria ◽  
Element Method

scholarly journals Application of Failure Criteria on Plywood under Bending

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4449
Author(s):  
Miran Merhar
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Composite Materials ◽  
Maximum Stress ◽  
Failure Criteria ◽  
The Finite Element Method ◽  
Stress Criterion ◽  
Composite Modulus ◽  
Element Method

In composite materials, the use of failure criteria is necessary to determine the failure forces. Various failure criteria are known, from the simplest ones that compare individual stresses with the corresponding strength, to more complex ones that take into account the sign and direction of the stress, as well as mutual interactions of the acting stresses. This study investigates the application of the maximum stress, Tsai-Hill, Tsai-Wu, Puck, Hoffman and Hashin criteria to beech plywood made from a series of plies of differently oriented beech veneers. Specimens were cut from the manufactured boards at various angles and loaded by bending to failure. The mechanical properties of the beech veneer were also determined. The specimens were modelled using the finite element method with a composite modulus and considering the different failure criteria where the failure forces were calculated and compared with the measured values. It was found that the calculated forces based on all failure criteria were lower than those measured experimentally. The forces determined using the maximum stress criterion showed the best agreement between the calculated and measured forces.

scholarly journals Application of the Finite Element Method in the Analysis of Composite Materials: A Review

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 818 ◽  
Author(s):  
Sarah David Müzel ◽  
Eduardo Pires Bonhin ◽  
Nara Miranda Guimarães ◽  
Erick Siqueira Guidi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Composite Materials ◽  
Mechanical Characteristics ◽  
Failure Criteria ◽  
Point Of View ◽  
The Finite Element Method ◽  
Industrial Sectors ◽  
Different Levels ◽  
Element Method

The use of composite materials in several sectors, such as aeronautics and automotive, has been gaining distinction in recent years. However, due to their high costs, as well as unique characteristics, consequences of their heterogeneity, they present challenging gaps to be studied. As a result, the finite element method has been used as a way to analyze composite materials subjected to the most distinctive situations. Therefore, this work aims to approach the modeling of composite materials, focusing on material properties, failure criteria, types of elements and main application sectors. From the modeling point of view, different levels of modeling—micro, meso and macro, are presented. Regarding properties, different mechanical characteristics, theories and constitutive relationships involved to model these materials are presented. The text also discusses the types of elements most commonly used to simulate composites, which are solids, peel, plate and cohesive, as well as the various failure criteria developed and used for the simulation of these materials. In addition, the present article lists the main industrial sectors in which composite material simulation is used, and their gains from it, including aeronautics, aerospace, automotive, naval, energy, civil, sports, manufacturing and even electronics.

Criterion for Prevention of Central Bursting in Forward Extrusions Through Spherical Dies Using the Finite Element Method

2001 ◽  
Vol 124 (1) ◽  
pp. 65-70 ◽  
Author(s):  
S. Sriram ◽  
C. J. Van Tyne
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Failure Criteria ◽  
Critical Values ◽  
Mean Stress ◽  
The Finite Element Method ◽  
Cold Forming ◽  
Critical Step ◽  
Secondary Operations ◽  
Element Method

Spherical dies are increasing in popularity in the cold-forming industry because of the ease in subsequent secondary operations. This paper presents criteria curves, calculated using the finite element method, to avoid central bursting or internal chevrons in forward extrusions through spherical dies. Critical values of mean stress at the centerline of the extrusion are used as failure criteria to distinguish between acceptable and unacceptable die designs. These failure criteria are conservative in that the critical step for central bursting is considered to be the formation of a microvoid during extrusion, rather than linking of the voids during continued deformation. The resulting process criteria curves are conservative estimates of internal chevron formation during extrusion through spherical dies.

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