中国有色金属学报(英文版)
中國有色金屬學報(英文版)
중국유색금속학보(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
8期
2439-2445
,共7页
秦庆华%张建勋%王正锦%李慧敏%郭丹
秦慶華%張建勛%王正錦%李慧敏%郭丹
진경화%장건훈%왕정금%리혜민%곽단
压入%夹芯梁%能量吸收%金属泡沫%大挠度
壓入%夾芯樑%能量吸收%金屬泡沫%大撓度
압입%협심량%능량흡수%금속포말%대뇨도
indentation%sandwich beam%energy absorption%metal foam%large deflection
研究集中载荷作用下金属泡沫夹芯梁的准静态压入力学行为。考虑到夹芯梁表板弯曲和拉伸的相互作用,提出了一个金属泡沫夹芯梁局部压入大挠度变形行为的新理论模型,并详细讨论芯材剪切对局部压入行为的影响。为了验证理论模型的有效性,对夹芯梁的局部压入行为进行有限元数值模拟,理论预测结果与有限元模拟结果吻合得很好。结果表明:当压入挠度超过夹芯梁表板厚度后,塑性膜力控制着夹芯梁的局部压入行为。
研究集中載荷作用下金屬泡沫夾芯樑的準靜態壓入力學行為。攷慮到夾芯樑錶闆彎麯和拉伸的相互作用,提齣瞭一箇金屬泡沫夾芯樑跼部壓入大撓度變形行為的新理論模型,併詳細討論芯材剪切對跼部壓入行為的影響。為瞭驗證理論模型的有效性,對夾芯樑的跼部壓入行為進行有限元數值模擬,理論預測結果與有限元模擬結果吻閤得很好。結果錶明:噹壓入撓度超過夾芯樑錶闆厚度後,塑性膜力控製著夾芯樑的跼部壓入行為。
연구집중재하작용하금속포말협심량적준정태압입역학행위。고필도협심량표판만곡화랍신적상호작용,제출료일개금속포말협심량국부압입대뇨도변형행위적신이론모형,병상세토론심재전절대국부압입행위적영향。위료험증이론모형적유효성,대협심량적국부압입행위진행유한원수치모의,이론예측결과여유한원모의결과문합득흔호。결과표명:당압입뇨도초과협심량표판후도후,소성막력공제착협심량적국부압입행위。
The quasi-static indentation behavior of sandwich beams with a metal foam core was investigated. An analytical model was developed to predict the large deflections of indention of the sandwich beams with a metal foam core subjected to a concentrated loading. The interaction of plastic bending and stretching in the local deformation regions of the face sheet was considered in the analytical model. Moreover, the effects of the shear strength of the foam core on the indentation behavior were discussed in detail. The finite element simulations were preformed to validate the theoretical model. Comparisons between the analytical predictions and finite element results were conducted and good agreement was achieved. The results show that the membrane force dominates indentation behavior of the sandwich beams when the maximum deflection exceeds the thickness of the face sheet.