ENGINEERING CALCULATORS
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Engineering calculators (Beta)
For one bolt load share, compare residual clamp force, friction holding force and bolt tensile stress under external loading.
Click the grid to add ordered vertices. Edit coordinates in mm; separate holes with a blank line. The last vertex closes to the first automatically.
Choose units and enter numbers. Full-width digits and fractions such as 1/8 or 1 3/8 are accepted. Changing a unit converts the entered value.
Reference calculation only. Results do not certify suitability for an actual design or its safety.
Inputs: select a blue symbol to edit Results: red-orange values and lines
3D shows an illustrative extrusion. Its display length does not enter the section calculations. Edit dimensions in 2D.
Pd=kP; Vd=kV; Fc=max[0,F₀min−(1−C)Pd]; Fslip=μFc; Pd,sep=F₀min/(1−C); Fb=max[Pd,F₀max+CPd]; σ=Fb/At.
Displayed values are rounded. Diagrams illustrate the calculation conditions. Initial material and fluid properties are examples; replace them with values for the actual material, temperature and conditions.
ReferenceEquations assume particular loads, supports and deformation ranges. Check inputs, units and the applicability of each equation. Diagrams explain conditions; they are not manufacturing drawings or proof of safety.
Material values are typical values or reference ranges, not certified product properties or ready-to-use design allowables. They vary with standards, product form, dimensions, temper and temperature. Check the specifications and inspection certificates for the actual product.
Displayed safety factors and checks apply only to the supplied inputs and calculation model. They do not automatically establish the safety of a complete design, including code compliance, service life, fatigue or joints. For actual design, manufacture and use, separately verify applicable regulations and standards, product specifications, and the necessary tests and engineering review.
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1本分の接合部について、外力後に残る締付け力と摩擦保持力、ボルトの引張応力を比較します。
Pd=kP; Vd=kV; Fc=max[0,F₀min−(1−C)Pd]; Fslip=μFc; Pd,sep=F₀min/(1−C); Fb=max[Pd,F₀max+CPd]; σ=Fb/At.
同心で軸方向に引く1本分の接合部、1つの摩擦接合面、線形ばねの簡略モデルです。Cは荷重導入位置とボルト・被締結体の剛性を含む実効的な分担率として別途確認します。0.2をどの接合部にも適用する値にはしません。初期軸力は締付けばらつき、なじみ、温度、緩みを考慮した使用状態の範囲を指定します。離間後は圧縮力0とし摩擦保持を見込みません。最大軸力側の引張力は離間後の全外力負担へ連続して切り替えます。滑り後のボルトせん断・穴面圧、偏心・こじり、疲労、ねじ山抜け、座面圧、締付け時のねじりは別計算です。
For one bolt load share, compare residual clamp force, friction holding force and bolt tensile stress under external loading.
Pd=kP; Vd=kV; Fc=max[0,F₀min−(1−C)Pd]; Fslip=μFc; Pd,sep=F₀min/(1−C); Fb=max[Pd,F₀max+CPd]; σ=Fb/At.
Simplified concentric linear-spring model for one bolt tributary share and one friction interface. Independently establish effective load fraction C including load introduction and bolt/member stiffness; 0.2 is not universal. Enter service preload bounds including tightening scatter, embedment, temperature and relaxation. After separation, compression and credited friction are zero. Maximum-preload tensile force transitions continuously to carrying the full external force after separation. Post-slip bolt shear/hole bearing, eccentricity/prying, fatigue, thread stripping, bearing pressure and tightening torsion are separate.
図で条件を整理してから計算し、最後に実際の部品仕様を確認します。
Understand conditions with diagrams, calculate, then verify actual specifications.
