Composite Material and Structure

Gust effect is an Analyzing wind-induced loads for structural safety assessment.The formula is given by: Where: Fgust​ is the wind-induced force due to the gust, ρ is the air density, Vgust​ is the gust wind speed, Cd​ is the drag coefficient, A is the reference area (e.g., the projected area of the structure perpendicular to the […]

Base isolation is a Shield structures from earthquakes, enhancing safety.The formula is given by: Where: abase​ is the acceleration response at the base of the isolated structure, aground​ is the ground acceleration input.

Critical for stable structures, soil dynamics, foundation vibrations analysis.The formula is given by: Where: F(ω) is the Fourier transform of the applied dynamic load, U(ω) is the Fourier transform of the resulting foundation displacement, ω is the angular frequency.

Analyze seismic response for structural design, ensuring safety and resilience.The formula is given by: Where: Sa​(T) is the spectral acceleration at a given period T, Sd​(T) is the design response spectrum at period T, Ag​ is the ground acceleration.

Calculate modal damping ratios for understanding structural vibration behavior.The formula is given by: Where: Δf is the width of the frequency response curve at the -3 dB (half-power) points, fn​ is the natural frequency of the mode.

Structure response to external forces studied for dynamic behavior understanding.The formula is given by: Where: M is the mass matrix of the structure, C is the damping matrix, K is the stiffness matrix, u(t) is the vector of displacements of the structure at time t, ¨u¨(t) is the acceleration vector of the structure at time t,

Craig-Bampton method is an Efficient structural dynamics analysis for complex systems.The formula is given by: Where: Mc​ and Kc​ are the condensed mass and stiffness matrices of the free component region, ¨u¨c​ and uc​ are the acceleration and displacement vectors of the boundary degrees of freedom of the free component region, Fc​ is the external force

Fracture toughness as crack extends, vital for structural analysis.The formula is given by: Where: KIc​(a) is the fracture toughness at a given crack length a, KIc​(0) is the initial fracture toughness (typically at a=0), R(a) is the increment in fracture toughness as the crack grows.

Irreversible deformation theory essential for engineering design and material analysis.The formula is given by: Where: σ is the stress tensor, ϵ is the strain tensor, ϵp​ is the plastic strain tensor, f is a function describing the material’s yield behavior.

Measures adhesive’s ability to withstand applied forces between materials. The formula is given by: Where: Bond Strength is the adhesive bond strength, Force is the maximum force required to pull apart the bonded materials, Area is the bonded area between the materials.