1970
DOI: 10.1007/bf02324095
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An investigation of the hole-drilling technique for measuring planar residual stress in rectangularly orthotropic materials

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Cited by 35 publications
(26 citation statements)
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“…From Table 2 it is possible to observe deviations lower than 1% between the coefficients computed by FEM and those calculated theoretically by equations (11); such a result confirms that the proposed formulation is algebraically and computationally correct. Deviations lower than 5-6% between the values obtained by Schajer [15] and those provided by equations (11), are instead observed; such limited deviations are mainly due to the different strain gauge modeling used in the present paper and in [15]. In particular, in the present paper the strain measured by the strain gauge is computed by considering the average strain of the total strain gauge area A ¼ w Á l (see Fig.…”
Section: Homogeneous Orthotropic Materialsmentioning
confidence: 59%
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“…From Table 2 it is possible to observe deviations lower than 1% between the coefficients computed by FEM and those calculated theoretically by equations (11); such a result confirms that the proposed formulation is algebraically and computationally correct. Deviations lower than 5-6% between the values obtained by Schajer [15] and those provided by equations (11), are instead observed; such limited deviations are mainly due to the different strain gauge modeling used in the present paper and in [15]. In particular, in the present paper the strain measured by the strain gauge is computed by considering the average strain of the total strain gauge area A ¼ w Á l (see Fig.…”
Section: Homogeneous Orthotropic Materialsmentioning
confidence: 59%
“…Table 1 shows the influence coefficients c ij (i,j=1,2,3) for an MM strain-gage rosette type XXX-RE (having r 1 =l ¼ 0:898 and w=l ¼ 0:994-see Fig. 2), calculated by using equations (11) and considering various values of the dimensionless elastic constants E, G, n and of the r a /r m ratio between the hole radius and the mean radius of the strain-gage rosette (Fig. 3).…”
Section: Extension To Orthotropic Laminatesmentioning
confidence: 99%
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“…In the case of composite laminates [0 2 /θ 2 ] s , the facts that non-uniform distribution of residual stresses in through-depth and the anisotropic property of composite laminates should be admitted. In order to determine the residual strain profile in hole-depth direction, the incremental hole-drilling method [6] Based on the previous work [7], a formula (Eq. 1) is deduced to express the stress-strain relation in composite laminate.…”
Section: Residual Stresses Determinationmentioning
confidence: 99%
“…Una suposición sencilla que a veces se hace es que las tensiones liberadas para materiales ortótropos son parecidas a las de los materiales isótropos de forma trigonométrica [Bert68], [Lake70], [Prasad87 87b]. Por lo tanto, se asume que la ecuación (3.22) es válida y que las galgas 1 y 3 (las que forman 90º entre sí), se encuentran en las direcciones simétricas del material ortótropo.…”
Section: Materiales Isótroposunclassified