Numerical analysis of the counterintuitive dynamic behavior of the  elastic-plastic fully-clamped beams under impulsive loading

Alizadeh, Mehdi; Shirazi, Kourosh Heidari; Moradi, Shapour; Sedighi, Hamid M.

doi:10.5755/j01.mech.23.1.17677

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…15 Qian and Symonds 16 also used the Galerkin method to develop discrete models suitable for studying the anomalous and chaotic nonlinear response of beams considering the geometric nonlinearity due to axial end constraints. Besides, the anomalous response of the beams found in the Kolsky's experiment 12 is numerically modeled for fully-clamped beams by Shams Alizadeh et al 17 using the Galerkin method and ANSYS/LS-DYNA. To conduct this research, in addition to using Galerkin method, the finite element code ANSYS/LS-DYNA is also applied to study the aforementioned phenomenon and the results of these two methods have been compared.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, the anomalous response of the beams found in the Kolsky's experiment 12 is numerically modeled for fully-clamped beams by Shams Alizadeh et al. 17 using the Galerkin method and ANSYS/LS-DYNA. To conduct this research, in addition to using Galerkin method, the finite element code ANSYS/LS-DYNA is also applied to study the aforementioned phenomenon and the results of these two methods have been compared.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of the counter-intuitive dynamic behavior of the elastic-plastic pin-ended beams under impulsive loading with regard to linear hardening effects

Alizadeh

Shirazi

Moradi

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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The counter-intuitive behavior where the permanent deflection of elastic-plastic beam come to rest in the opposite direction of the impulsive loading, normally appears and disappears abruptly, in certain small ranges of loading and structural parameters. One of the most important issues in the study of this phenomenon is the determination of the influence of different parameters. This work is aimed to study the effects of hardening in counter-intuitive dynamic behavior of elastic-plastic pin-ended beams under impulsive loading. This has been done by developing the proposed Galerkin numerical model and presenting a novel algorithm. The Galerkin method as well as the commercial finite element code ANSYS/LS-DYNA is applied to study this phenomenon. In order to account for the hardening effects in Galerkin method, a new algorithm is proposed. The time history curves for mid-span of the beam is studied in detail and the region of the occurrence of the counter-intuitive behavior is determined. Furthermore, using the finite element software, energy diagrams of the beam are also derived. It has been found that the counter-intuitive behavior is a phenomenon, which is very sensitive to loading, therefore it may appear with a little change in the amount of loading. The results also show that although both methods predict one continuous region of loading for the occurrence of this phenomenon in elastic-perfectly plastic beams, still there are two continuous distinct regions of loading, when considering the hardening effects, for this phenomenon. In addition, this anomalous behavior would occur in the proper ratios of kinetic to internal energy and when considering the linear hardening effects, the possibility of the occurrence of the counter-intuitive behavior exists in a wider domain of energy ratio.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the counter-intuitive dynamic behavior of the elastic-plastic pin-ended beams under impulsive loading with regard to linear hardening effects

Alizadeh

Shirazi

Moradi

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…""" |OwyWO=B |m}t=v}O Q=DiQ |OOa R}r=v; u}mQro VwQ w ANSYS/LS-DYNA |OOa Om R= xO=iDU= =@ |OOa CQwYx@ w xOW |R=UpOt Q=OQ}o , qt=m |=yQ}D |= Q@ [18] u= Q=mty w xO= R}ra TtW \UwD Q@ xwqa CU= xOW u}}aD C=W}=tR; p}@k u}= QO xrUt KQW "1"2…”

mentioning

confidence: 99%

آنالیز عددی رفتار دینامیکی پادشهودی تیرهای کشسانی - خمیر پین دار تحت بار ضربه‌یی با ملاحظه ی اثرات سخت‌شوندگی خطی

علیزاده¹,

شیرازی²,

مرادی³

et al. 2018

مهندسی مکانیک شریف

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R}r=v; '|}x@Q[ |Q=PoQ=@ '|O=aQ}e MU=B '|OwyWO=B Q=DiQ %|O}rm u=oS=w "|Q}tN |v=UWm |m}t=v}OxtOkt "1 Ov=xDUv=wD =yv; R= |NQ@ \ki =t= [1] xOt; CUO x@ OwOLt p[=iD VwQ w OwOLt |}=Hx@=H Qov=Wv xm |}=Hx@=H |ivt |=yxOwOLt QO |}=yv |v=UWm C=W=aDQ= C=W=aDQ= =yv; |k@=t w Ovvm |v}@V}B = Q CU= |r=ta= Q=@ CyH hqN QO |}=yv "Ov=xOQm |v}@V}B = Q C@Ft |xOwOLt QO |}=yv |v=UWm p[=iD VwQ w s}kDUt |Q}op}Uv= Qi}O OQm}wQ R= |Q}oxQy@ =@ [2] w}r w |r Q=m x@ T=UL Q=}U@ |xrUt u}= |xar=]t |= Q@ = Q QDt=Q=B C}U=UL VwQ '|RmQt QDt=Q=B C}a]k sOa Q_v x]kv R= = Q =yQ}D |OwyWO=B MU=B [3] u}vJty =yv; "OvOQ@ |O= R; xHQO xU pOt l} R= [4] u= Q=mty w |r 'u}= Q@ xwqa "OvO=O Q= Qk |UQQ@ OQwt |=yQDt= Q=B x@ |OwyWO=B |x}L=v |oDU@=w lQO |= Q@ '|rv=W |Q}tN |v=UWm "OvOQ@ xQy@ sDU}U h}YwD w |OwyWO=B Q=DiQ |v}@V}B QO |OOa |=yOm R= |Q=}U@ xm =Hu; R= |= Q@ R}v OwOLt CkO =@ |@} QkD |=ypOt R= |NQ@ [1] 'OvDUy u=wD=v u; |=y|oS}w R= TB Q}D Q=DiQ R}r=v; |= Q@ "CU= xOW x=Q= Q=DiQ u}= R= |}xS} w |=yx@vH |UQQ@ XYNDt \UwD ?r=H C}ak=w l} '=m}Qt= |xOLDt Cq=}= QwWm QO 1985 p=U QO "OW hWm [1] w} VQ=mty w Rvwt}=U '=yQ}D |Q}tN |v=UWm l}t=v}O QwyWt xm |Dkw 'u}at \}=QW CLD xm O=O|t u=Wv =yv; \UwD xDiQo CQwY C=@U=Lt Qw]x@ w[a u}= Qo = 'OwW|t OQ=w |Q}tN |v=UWm Q}D Q@ |[Qa |}x@ Q[ Q=@ l} pmW Q}}eD O=H}= |= Q@ |i=m COW |= Q=O R}v xOQ=w Q=@ w OW=@ xOW O}kt |QwLt x@ 'Q}D |t=O R}N u; QO xm OQ=O OwHw |Q=PoQ=@ R= |mJwm |x}L=v 'OW=@ |Q}tN R= "OwW|t`k=w u; CyH hqN QO 'OQ}o Q= Qk |}x@ Q[ Q=@ CyH QO xm u}= |=H =yv; 'Ow@ C=W}=tR; QO Q=_Dv= p@=k w 1 |OwyW Q=DiQ hqNQ@ Q=DiQ u}= xm =Hu; |=yMU=B xJQo = "OvO}t=v Q}D 3 |O=aQ}e Q=DiQ =} 2 |OwyWO=B Q=DiQ = Q xO}OB u}= |= RH= VwQ |OOa Om xO |xr}Uw x@ 'w} w Rvwt}=U \UwD xOW h} QaD |xS}w |xrUt

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Blast mitigation effects of TPU polymers-based inflated membrane structures under external explosion

Li,

Qi,

Huang

et al. 2024

Construction and Building Materials

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Numerical analysis of the counterintuitive dynamic behavior of the elastic-plastic fully-clamped beams under impulsive loading

Cited by 5 publications

References 17 publications

Numerical analysis of the counter-intuitive dynamic behavior of the elastic-plastic pin-ended beams under impulsive loading with regard to linear hardening effects

Numerical analysis of the counter-intuitive dynamic behavior of the elastic-plastic pin-ended beams under impulsive loading with regard to linear hardening effects

آنالیز عددی رفتار دینامیکی پادشهودی تیرهای کشسانی - خمیر پین دار تحت بار ضربه‌یی با ملاحظه ی اثرات سخت‌شوندگی خطی

Blast mitigation effects of TPU polymers-based inflated membrane structures under external explosion

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