CAJ | 학술논문

针对标准铺层拉伸－剪切耦合层合板耦合效应弱的缺点，提出利用优化法的自由铺层拉伸－剪切耦合层合板的设计方法。推导了只具有拉伸－剪切耦合效应的层合板应满足的条件。优化得到了7～14层的自由铺层拉伸－剪切耦合对称层合板。对比分析了自由与标准铺层拉伸－剪切耦合层合板的屈曲强度与稳定性。采用自由铺层拉伸－剪切耦合层合板设计了拉伸－扭转耦合结构。研究表明：自由铺层的拉伸－剪切耦合层合板的屈曲强度以及稳定性要显著弱于标准铺层层合板，但具有更强的耦合效应；随着层数的增加，自由铺层的拉伸－剪切耦合层合板的最大耦合效应逐渐减小。
침대표준포층랍신－전절우합층합판우합효응약적결점，제출이용우화법적자유포층랍신－전절우합층합판적설계방법。추도료지구유랍신－전절우합효응적층합판응만족적조건。우화득도료7～14층적자유포층랍신－전절우합대칭층합판。대비분석료자유여표준포층랍신－전절우합층합판적굴곡강도여은정성。채용자유포층랍신－전절우합층합판설계료랍신－뉴전우합결구。연구표명：자유포층적랍신－전절우합층합판적굴곡강도이급은정성요현저약우표준포층층합판，단구유경강적우합효응；수착층수적증가，자유포층적랍신－전절우합층합판적최대우합효응축점감소。
Focusing on the deficiencies of standard-form laminate with extension-shear coupling,such as weak extension-shear coupling,the design method for free-form laminate with extension-shear coupling using the method of optimization design was proposed.Necessary and sufficient material-independent conditions were derived for extension-shear coupled laminates.The stacking sequences of 7-ply to 14-ply free-form laminates with extension-shear coupling were derived.Comparisons were made on buckling strength and robustness of extension-shear coupled laminates.The free-form laminate with extension-shear coupling was used to design structure with extension-twist coupling.Compared to the standard-form laminate,the free-form laminate with extension-shear coupling is worse in buckling strength and robustness,while it’s stronger in coupling.The results also indicate that with an increase in the number of plies,the maximum extension-shear coupling flexibility coefficient of the free-form laminate decreases.