The effects of composite laminate stiffness and loading on stress resultant concentration factor around a hole

Damghani, Mahdi; Harrison, Christopher; Kennedy, David

doi:10.1177/0954406218755187

Cited by 8 publications

(3 citation statements)

References 30 publications

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“…Dai et al [22] studied stress created in an infinite plane with a special state of the circular hole by applying the Gurtin-Murdoch method. Damghani et al [23] investigated the effect of stacking sequence and laminate homogenized stiffness parameters on stress distribution around an elliptical hole in an unlimited laminate subject to membrane loading by using the complex variable technique.…”

Section: Literature Reviewmentioning

confidence: 99%

Mutual Influence of Geometric Parameters and Mechanical Properties on Thermal Stresses in Composite Laminated Plates with Rectangular Holes

et al. 2021

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In this research, the mutual influence of the mechanical properties and geometric parameters on thermal stress distribution in symmetric composite plates with a quasi-rectangular hole subjected to uniform heat flux is examined analytically using the complex variable technique. The analytical solution is obtained based on the thermo-elastic theory and the Lekhnitskii’s method. Furthermore, by employing a suitable mapping function, the solution of symmetric laminates containing a circular hole is extended to the quasi-rectangular hole. The effect of important parameters including the stacking sequence of laminates, the angular position, the bluntness, and the aspect ratio of the hole and the flux angle in the stacking sequence of [45/−45]s for composite materials are examined in relation to the thermal stress distribution. The thermal insulated state and Neumann boundary conditions at the hole edge are taken into account. It is found out that the hole rotation angles and heat flux angle play key roles in obtaining the optimum thermal stress distribution around the hole. The present analytical method can well investigate the interaction of effective parameters on symmetric multilayer composites under heat flux.

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Section: Literature Reviewmentioning

confidence: 99%

Mutual Influence of Geometric Parameters and Mechanical Properties on Thermal Stresses in Composite Laminated Plates with Rectangular Holes

et al. 2021

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“…Alshaya and Lin [12] used an analytical solution to determine the stress distribution around a circular hole located in an isotropic plate using the hybrid complex-variable method. Damghani et al [13] utilized the Lekhnitskiis complex variable method and obtained the stress resultant distribution at the edge of an elliptical or circular hole in an infinite composite plate under membrane loading. Moreover, they studied the effect of composite laminate stiffness on the stress resultant concentration factor around a circular hole.…”

Section: Literature Reviewmentioning

confidence: 99%

Analytical Thermal Stress Analysis of Perforated Symmetric Composite Laminates Containing a Quasi-Triangular Hole

2020

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Â ñòàòüå èçó÷åíî ðàñïðåäåëåíèå òåïëîâûõ íàïðÿaeåíèé âîêðóã êâàçèòðåóãîëüíîãî îòâåðñòèÿ â ñèììåòðè÷íîì ñëîèñòîì êîìïîçèòå, ñîñòîÿùåì èç ñëîåâ ðàçëè÷íûõ êîìïîçèöèîííûõ ìàòåðèàëîâ. Íà îñíîâå ðåøåíèÿ äâóìåðíîé çàäà÷è òåðìîóïðóãîñòè äëÿ ñòàöèîíàðíîãî ñëó÷àÿ â ðàìêàõ ìåòîäà êîìïëåêñíûõ ïåðåìåííûõ àíàëèòè÷åñêè èññëåäîâàíî ïîâåäåíèå êîìïîçèòà ïîä âîçäåéñòâèåì îäíîðîäíîãî òåïëîâîãî ïîòîêà. Àíàëèòè÷åñêîå ðåøåíèå ïîëó÷åíî ïóòåì ïðåîáðàçîâàíèÿ ðåøåíèÿ Ëåõíèöêîãî ñ èñïîëüçîâàíèåì êëàññè÷åñêîé òåîðèè ñëîèñòûõ ïëàñòèí è ôóíêöèè êîíôîðìíîãî îòîáðàaeåíèÿ. Èçó÷åíî âëèÿíèå ðÿäà ïàðàìåòðîâ íà ðàñïðåäåëåíèå òåïëîâûõ íàïðÿaeåíèé âîêðóã îòâåðñòèÿ, âêëþ÷àÿ îðèåíòàöèþ îòâåðñòèÿ, ñòåïåíü çàêðóãëåíèÿ óãëîâ è ñîîòíîøåíèå ñòîðîí îòâåðñòèÿ, óãîë òåïëîâîãî ïîòîêà, ïîñëåäîâàòåëüíîñòü óêëàäêè, à òàêaeå ìàòåðèàë ñëîåâ. Ðåçóëüòàòû ïðèâåäåíû äëÿ ðàçëè÷íûõ ïîñëåäîâàòåëüíîñòåé óêëàäêè [45°/45°] s è [0°/90°] s. Íàéäåííîå àíàëèòè÷åñêîå ðåøåíèå ïîêàçûâàåò õîðîøåå ñîîòâåòñòâèå ñ ðåçóëüòàòàìè, ïîëó÷åííûìè ìåòîäîì êîíå÷íûõ ýëåìåíòîâ. Êëþ÷åâûå ñëîâà: ìåòîä êîìïëåêñíûõ ïåðåìåííûõ, êâàçèòðåóãîëüíîå îòâåðñòèå, ñèììåòðè÷íûé ñëîèñòûé êîìïîçèò, òåïëîâîå íàïðÿaeåíèå, ïîñëåäîâàòåëüíîñòü óêëàäêè ñëîåâ

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“…In another work by Damghani et al., 24 different analytical method was used. A conformal mapping and complex variable technique were investigated to study the behaviours of composite laminates of infinite width plate with circular open holes under different types of loading.…”

Section: Introductionmentioning

confidence: 99%

An approximate analytical model for modification of size effect law for open-hole composite structure under biaxial load

Abdellah

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Nominal strength prediction remains the main challenge in the field of design and manufacturing of composite laminates. An approximate model to study the stress distribution around a circular hole in composite laminates is derived in this study. This model is constructed using well-known cohesive zone models and mainly depends on the un-notch strength and in-plane fracture toughness. The model attempts to modify and extend the specimen size effect curves, extracted using two-parameter cohesive laws (linear, exponential, and constant), into a biaxial stress state. It successfully predicts the damage initiation, propagation, and fracture of multidirectional composite laminates. Moreover, the stress concentration factor for a composite plate under varying biaxiality is calculated.

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The effects of composite laminate stiffness and loading on stress resultant concentration factor around a hole

Cited by 8 publications

References 30 publications

Mutual Influence of Geometric Parameters and Mechanical Properties on Thermal Stresses in Composite Laminated Plates with Rectangular Holes

Mutual Influence of Geometric Parameters and Mechanical Properties on Thermal Stresses in Composite Laminated Plates with Rectangular Holes

Analytical Thermal Stress Analysis of Perforated Symmetric Composite Laminates Containing a Quasi-Triangular Hole

An approximate analytical model for modification of size effect law for open-hole composite structure under biaxial load

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