Materials

7 tools in the Structures area.

MIL-HDBK-5J Allowables

This tool provides access to the MIL-HDBK-5J material properties database. Select a material using the cascading dropdowns to view its complete property data including tensile, compressive, shear, bearing properties, elastic moduli, and temperature-dependent strength reduction factors. Properties are displayed in the familiar MIL-HDBK-5J property sheet layout.

Material Finder

Reverse lookup of the MIL-HDBK-5J database: enter the strength, stiffness and density you need, the basis, grain direction and operating temperature, and the tool ranks every handbook row that qualifies, with the allowables reduced by the handbook's own temperature curves. Sort by specific strength, strength, stiffness or density; each result links to the material's page with the full sheet and curves.

Material Comparator

Side-by-side comparison of up to six MIL-HDBK-5J materials: type each one the way an engineer says it (2024-T3 sheet 0.1, 7075-T651 plate 1.5, Ti-6Al-4V annealed sheet, 17-4PH H900 bar, or a handbook row number), choose the grain direction and basis, and the tool lays out the room-temperature allowables side by side, overlays F_tu, F_ty and E against temperature from the handbook curves, and ranks the materials by specific strength at the temperature you enter.

Reference Stress

The following analysis calculates the compressive reference stresses at secant Moduli .7 Ec and .7 G. The proportional limits for compression and shear are also calculated.

Plastic Bending Allowables

The following analysis calculates the Cozzone stresses and plastic bending allowables given material modulus, ultimate strength, yield, ultimate strain, and section shape factor.

Triaxiality Cutoff

The following analysis produces a strain allowable for a particular stress state. This allowable is a modification to a handbook strain allowable which was measured during uniaxial specimen failures, not an actual complex stress state with high volumetric stress.

FEA Stress-Strain Input

Turns handbook material properties (E, Ec, ν, Ftu, Fty, Fcy, the Ramberg-Osgood exponents nt and nc and the elongation) into the nonlinear material input of the finite-element packages: a multi-point stress-strain table in the measure each one expects (engineering or true stress, total or plastic strain), a bilinear yield and tangent-modulus pair, or the Ramberg-Osgood parameters. Nastran (MSC, Simcenter, Femap, Inventor Nastran, OptiStruct), Ansys Mechanical APDL and Workbench, Abaqus and CalculiX, LS-DYNA, Radioss, SolidWorks Simulation, COMSOL and Code_Aster are covered. Enter the properties or load a saved MIL-HDBK-5J material; when the package takes one curve for tension and compression the two are averaged. The result is the card text ready to download or copy, the point table in every measure, and a chart of the engineering, true and FEA curves overlaid.

Other Structures sections

Composites · Frames and Trusses · Beams · Loads and Dynamics · Joints · Stress and Strain · Stability · Plates and Shells · Thin-Walled Structures · Contact · Stress Concentrations · Fatigue · Damage Tolerance