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Residual stress calculation method and residual stress distribution derivation method
Residual stress calculation method and residual stress distribution derivation method
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机译：残余应力计算方法和残余应力分布推导方法
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摘要
The present invention provides a method for calculating residual stress and a method for derivating residual stress distribution. The invention provides the method which is simply performed irrelatively with the kind of the used resin material for calculating the residual stress distribution in the resin molded part and the residual stress at a preset position. The strain change caused by performing punching to the resin molded part on the surface of the molded part is measured. For an example, a first stress on the resin molded part when a hole is punched to a first punching depth in the thickness direction of the resin molded part is calculated. Before punching, the stress generated on the resin molded part is zero. Zero is subtracted from the first stress thereby obtaining an approximate value of the residual stress at a middle position between a punching part and a first punching depth.
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