ToDo Calculator’s composite materials and structures calculator is a vital resource for enthusiasts, engineers, and professionals in this field. Tailored for composite material properties, structural mechanics, and design considerations, it offers advanced features and precise calculations. With its user-friendly interface, it accommodates users of all skill levels, making it indispensable for designing composite structures, analyzing their behavior, and optimizing performance in various applications.
Material failure predicted when maximum stress exceeds critical value.The formula is given by: Where: σ₁ is the maximum principal stress σ_x is the normal stress in the x-direction σ_y is the normal stress in the y-direction
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Maximum Principal Strain Theory is a Material failure predicted when maximum strain exceeds critical value.The formula is given by: Where: σ_1 and σ_2 are the maximum and minimum principal stresses, respectively. E is the Young’s modulus of the material.
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Energy method for calculating deflections in elastic structures.The formula is given by: Where: δ is the displacement at the point of application of the load. U is the strain energy of the structure. P is the applied load.
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Flexing beam theory describes bending in slender structures mathematically.The formula is given by: Where: σ is the bending stress at a point on the beam, M is the bending moment at that point, y is the perpendicular distance from the neutral axis to the point where the stress is being calculated (the distance from the centroid
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Ductility Index is a Measure of material’s deformation capability before rupture.The formula is given by: Where: DI = Ductility Index. εult = Ultimate elongation (or other measure of elongation). L0 = Original length of the material.
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Brittleness Index is a Ratio of tensile strength to hardness.The formula is given by: Where: BI = Brittleness Index. σt = Tensile strength of the material. H = Hardness of the material.
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Neutral axis is a Line of zero bending stress in structures.The formula is given by: Where: yn = distance from the centroid to the neutral axis (in the direction perpendicular to the axis of bending). Ic = moment of inertia of the entire cross-section about its neutral axis A = cross-sectional area. yc = distance from
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Dielectric constant is a material’s ability to store electrical energy in fields.The formula is given by: Where: C = capacitance of the capacitor. ε = dielectric constant of the material between the plates. ε0 = permittivity of free space (approximately 8.854×10−12 F/m8.854×10−12F/m) A = area of the plates. d = distance between the plates.
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Material’s ability to allow substances through; varies with conditions.The formula is given by: Where: μ is the magnetic permeability of the material, B is the magnetic flux density (in teslas), and H is the magnetic field strength (in amperes per meter).
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Material’s resistance to electric current flow.The formula is given by: Where: ρ is the electrical resistivity (in ohm-meters, Ω⋅m), R is the electrical resistance (in ohms, Ω), A is the cross-sectional area of the material through which the current flows (in square meters, m²), L is the length of the material through which the current flows
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