在3D打印中,通过多向剪切控制纤维方向的子声控制
Berin Šeta1, Marco Brander1, Michael Sandberg2
1Department of Civil and Mechanical Engineering, Technical University of Denmark, 2800, Kongens Lyngby, Denmark.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 29, 2025
概括
这项研究引入了一种新的3D打印方法,用于精确控制复合材料中的纤维方向. 这种技术可以为先进的应用程序创建复杂的,局部化的3D异构形状.
科学领域:
- 材料科学 材料科学 材料科学
- 增材制造 增材制造 增材制造
- 复合材料 复合材料 复合材料
背景情况:
- 材料属性因方向而有所变化的无同otropy在自然界中很常见,但在常规制造中复制是具有挑战性的.
- 现有的3D打印方法对光纤定向的控制有限,通常仅限于2D或在voxel层面的大批重定向.
- 在自然材料中发现的局部3D异构形的重建仍然是一个重大障碍.
研究的目的:
- 开发一种新的3D打印技术,以实现三维光纤方向的亚声素控制.
- 为了实现微观结构的数字编程,在打印的线程中进行精确的异构.
- 为了证明这种技术在创造具有局部,可控制反应的材料方面的能力.
主要方法:
- 利用了一种新的3D打印方法,通过喷嘴旋转和倾斜进行多方向剪切.
- 实现了一个数值模型来驱动和控制在亚声元水平的纤维方向.
- 进行了机械和热试验,以验证可编程异构性.
主要成果:
- 成功证明了纤维方向在所有三个维度的亚声素控制.
- 实现了具有局部和可控制的异构反应的可编程微结构.
- 通过实验性机械和热检测验证了该技术的有效性.
结论:
- 开发的3D打印技术克服了复制复杂3D异构形的局限性.
- 这种方法允许精确的数字编程材料微观结构.
- 潜在的应用包括先进的可穿戴设备,生物医学植入物,轻质复合材料和能量存储设备.
相关概念视频
Shearing Strain
1.3K
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between the...
1.3K
Unsymmetric Bending - Angle of Neutral Axis
820
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
820
Plastic Deformation in Circular Shafts
439
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
439
Eccentric Axial Loading in a Plane of Symmetry
540
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
540
Shear on the Horizontal Face of a Beam Element
508
To understand shear on the flat side of a prismatic beam element, consider the vertical and horizontal shearing forces, and the normal forces, acting on the element. The element's upper (U) and lower (L) sections, which are divided by the beam's neutral axis, are examined. The equilibrium of these forces is determined by applying the equilibrium equation, which helps identify the horizontal shearing force. This force is directly related to the bending moments and the cross-section's...
508
Transformation of Plane Strain
487
When analyzing elongated structures like bars subjected to uniformly distributed loads, it is essential to understand the transformation of plane strain when coordinate axes are rotated. This transformation helps to assess how material deformation characteristics vary with orientation, which is crucial in materials science and structural engineering.
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
Under plane strain conditions, typical for members where one dimension significantly exceeds the others, deformations and resultant strains are...
487


