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April 2, 2024

Posts tagged "abaqus"
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Composite Material

When you enter the engineering world, one of the first things you will hear is “Composite”. Most likely, you hear it in some of your conversations when you talk about your dental problems, buildings, airplanes, etc. Compared to other common materials, composites are known mostly because of their strength and lightness. Imagine you want to design a plane; you must select a material with properties such as high strength, being as light as possible to fly, and being flexible. Common materials like steel have the strength we need, but they’re heavy and do not have the flexibility we need. Well, the best choice would be composite. Manufacturers can create qualities that precisely meet the needs of a specific structure for a specific purpose by selecting the right reinforcing and matrix material mix. Take a look at the table below; there are some advantages and disadvantages of these materials. In comparison to metals, composites’ damage mechanisms are less well known. Composite materials and structures are susceptible to defects, whether they appear during material processing, component fabrication, or in-service use. Understanding how the damage or defect affects the structural integrity of the composite component is crucial to determining how critical the defect […] read more
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The subject of failure criteria for fibre reinforced plastic composites has attracted numerous researchers over the last four decade. The number and different types of approaches that have been proposed clearly demonstrates that failure criteria for fibre reinforced plastic composites it is still today an important research topic. Although it is clear that important progresses have been made, it does not appear that there is any criterion universally accepted by designers as adequate under general load conditions. The failure criteria proposed to predict lamina failure could be divided in two main groups: a)      Failure criteria not associated with failure modes  This group includes all polynomial and tensorial criteria, using mathematical expressions to describe the failure surface as a function of the material strengths. Generally, these expressions are based on the process of adjusting an expression to a curve obtained by experimental tests. The most general polynomial failure criterion for composite materials is Tensor Polynomial Criterion proposed by Tsai and Wu. Failure criteria associated with failure modes can be further sub-divided in two sub-groups:  b.1) Non-interactive: do not take into account interactions between stresses/strains acting on a lamina. This fact typically leads to errors in the strength predictions when multiaxial states […] read more
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