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      • Electro-activated shape memory hybrid
      • SMHs: tailorable properties
      • Shape memory hybrids: a brief history
    • Triple/multiple SME
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    • Constrained recovery of 2way EVA
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      • SME in commercial polymers
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    • DIY (step-by-step) to protect power charge cable 自制充电线接头保护层
    • DIY SMP screw 自制形状记忆螺丝
    • DIY shape memory foam 自制形状记忆海绵
    • DIY shape memory shoes 自制形状记忆鞋
    • Modifying superelastic Nitinol 超弹镍钛记忆合金改性
    • Goggles
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      • Self-tightening band aid 自收缩创可贴
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      • Artificial blood vessels
      • Comfort fitting 舒适贴合 >
        • Shape memory shoes 形状记忆鞋
        • Wrist rings/rings
        • Mask口罩 >
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          • Mask holder 口罩支架
          • Improved fitting
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      • SMA inchworm 形状记忆合金驱动的竹节虫
      • Rolling car 滚动车
      • SMA springs
      • Gripper
    • SMP applications >
      • 4D latte art 4D 拉花 >
        • Spinning 4D latte art
      • Re-writable Braille paper 可复写盲文纸
      • Surface patterning
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        • Folding (multiple layered)
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      • Solid-state heating cross-linking
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      • Rapid 3D printing in solid state 快速固态3D打印 >
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        • UV cross-linking of solid material
        • UV cross-linking machine
        • Solid-state VAM (3D)
        • SVAM: A brief history
        • Review of Solid state VAM by AI
      • New ways of additive manufacturing (animation)
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    • Jungle >
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        • Cyclic loading
        • Mullins effect
        • Photoelsticity 光弹
        • Shear-thickening 剪切增强 >
          • 4 CNA
        • Closed to open cell foams
        • Laser induced graphene
        • Electrospinning
        • Nano imprinting
        • Gel 凝胶 >
          • Instability in wetting of hydrogel
          • Electroactive gel电活性凝胶
        • Cellulose 纤维素
        • Plastic bottle 塑料瓶
        • Polymer recycling
        • Rapid swelling 快速溶胀
        • Rapid hardening in water
        • Patterns
        • Brittle-ductile transition
        • Tan delta >
          • Re-programmable Tan delta
        • UV cross-linking
        • Hardening speed
      • Coloring 变色 >
        • Structural coloring atop curved surfaces
        • Thermochromic 热致变色
        • Photochromic 光致变色
        • Stress induced color change力致变色 >
          • Patterned coloring via stretching 拉出色彩
      • Moire interference 莫尔干涉
      • Lenticular lens
      • Transformation front
      • Contact angle vs surface pattern
      • Laser: applications
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      • Structural engineer >
        • Static and Dynamic Balancing
        • Introduction videos
        • Bistable structures: a case study >
          • 3D printing of bistable structures
          • Step-wise morphing
        • Yield criterion >
          • Normalized yield surface via GPU
          • Yield surface of SMAs and beyond
        • Buckling of embedded threads
        • Buckling of embedded strip
        • Buckling of strip atop soft substrate
        • Foam structures for packaging
      • Interesting >
        • Exhibition
        • Ideas
      • Experimental >
        • Tensile test
        • Differential Scanning Calorimetry (DSC) Procedure
        • Dynamic Mechanical Analysis (DMA) Procedure
        • Shape Memory Performance Characterization Procedure for Shape Memory Polymers
      • ChatGPT 4 fun
      • 智谱测试
  • Contact
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Bistable structures: a case study

Start from here

Modified from
​Seffen, K. Bi-stable concepts for reconfigurable structures. in Collection of Technical Papers-AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2004. Palm Springs, California: American Institute of Aeronautics and Astronautics.
​https://arc.aiaa.org/doi/abs/10.2514/6.2004-1526

Picture
Picture
Picture
Picture

​(FYP) Wong JC

Picture
Picture
Picture
​(FYP) Lim WY
​​(Intern) Saket Sharma
​Liu YH (HIT) and Geng YH (NUAA)
Picture
​Stepwise shape recovery (5x5 units) 3 cycles
Controlled sequence in forward and backward shape switching (with 1-2 side constraint)
Picture
Picture
​with Dr Wang TX (NAAU)

(FYP) Wong JC

(MSc) Cui J
Picture

​3D printed shape memory structure: heating for shape recovery

Picture


Picture
​P-FYP: Teo EH
​(FYP) Wong JC

Jump of bistable structure

​(MSc) Cui J
Programmable step-wise morphing (speed 10x)
Picture
Picture

The material is the machine via structural design for stepwise shape switching
Picture
Picture
Picture
Table for Combination

Picture
Picture
Viscoelastic material

(URECA) ​Brian Ye HL
Different holding time (small 1st shape room temp 4x)
​1x3 viscoelastic room temp
10 s holding time


柔性3D打印材料:从邵氏硬度A到D的配方设计

光敏树脂的三要素:齐聚物+单体+光引发剂的3D打印适配性

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  • HOME
  • SHAPE MEMORY MATERIALS/TECHNOLOGY
    • Shape memory alloys >
      • Shape memory alloy actuators
      • Grains and deformation
      • SMA suppliers
    • Shape memory polymers >
      • Thermo-responsive >
        • Heating-responsive >
          • Thermo-plastic elastic SMP >
            • Body/room temperature programmable
          • Thermoset elastic SMP >
            • Body/room temperature programmable
          • Tailoring Tg of polymers via alloying
          • Vitrimer
          • 3D printing filaments
          • Show time
          • Body-temperature programmable elastic shape memory materials: a brief history
        • Cooling-responsive >
          • Cooling-responsive shape memory materials: a brief history
      • Chemo-responsive >
        • Electrospinning: fundametals
        • Natural biopolymers
        • Water-responsive SME: a brief history
      • Hydrogel
      • Simulation of SMP
    • Shape memory hybrids >
      • Electro-activated shape memory hybrid
      • SMHs: tailorable properties
      • Shape memory hybrids: a brief history
    • Triple/multiple SME
    • Reversible/shape change effect
    • Programming conditions
    • Temperature memory effect in DSC
    • Buckling 失稳
    • Constrained recovery of 2way EVA
    • Shape memory structures
    • Shape memory composites
    • Intro. & Refs. >
      • SME in commercial polymers
      • SMM introduction videos
      • PMMA (acrylic)
  • DIY
    • Laser engraving and beyond
    • DIY (step-by-step) to protect power charge cable 自制充电线接头保护层
    • DIY SMP screw 自制形状记忆螺丝
    • DIY shape memory foam 自制形状记忆海绵
    • DIY shape memory shoes 自制形状记忆鞋
    • Modifying superelastic Nitinol 超弹镍钛记忆合金改性
    • Goggles
    • Temple Tip Retainers /眼镜防滑钩
    • Nose pads
    • 硅胶+TPU样品制作 搅拌流程
    • Unlock smart phones
  • PROJECTS
    • Biomedical applications 生物医疗应用 >
      • Self-tightening band aid 自收缩创可贴
      • Self-tightening staple 自收缩手术钉
      • Shape memory plug 形状记忆栓塞
      • Artificial blood vessels
      • Comfort fitting 舒适贴合 >
        • Shape memory shoes 形状记忆鞋
        • Wrist rings/rings
        • Mask口罩 >
          • DIY口罩扣松紧器
          • Mask holder 口罩支架
          • Improved fitting
          • Comfort fitting "invisible" mask 舒适贴合“隐形”口罩 >
            • Animation (mask)
        • Facial mask (面膜)
      • Retractable 可收回
      • Wrinkle removal 除皱
    • SMA devices 形状记忆合金器件 >
      • Buttons-on-demand 按需按钮
      • Sunlight activated heat engine 阳光驱动的热机
      • Adjustable high heel 可调高跟鞋
      • SMA inchworm 形状记忆合金驱动的竹节虫
      • Rolling car 滚动车
      • SMA springs
      • Gripper
    • SMP applications >
      • 4D latte art 4D 拉花 >
        • Spinning 4D latte art
      • Re-writable Braille paper 可复写盲文纸
      • Surface patterning
      • 2D to 3D switching
      • Ear impression/plugs
    • Metals/polymers >
      • Smart manufacturing
      • Powerless cooling
      • Self-healing
      • Sensors 传感器 >
        • Temperature sensors 温度标签
        • Anti-counterfeit labels 防伪标签
      • Vertical gardening 垂直绿化 >
        • 盆景 >
          • In Singapore
        • Products 产品 >
          • Event sponsorship
        • Projects 项目 >
          • A project in Guangzhou (2022)
          • 2nd Project in Guangzhou
          • 3rd Project in Singapore
        • Water on-demand irrigation system
        • Vertical greening panel (2nd type)
        • 2nd type of foam
      • Wearable electronics 可穿戴电子设备
      • Controlled folding/unfolding 可控展开/折叠 >
        • Folding (multiple layered)
        • Reshape & reprogram
      • Active disassembly 自拆卸
      • Morphing wing 变翼
      • Magnetic circuit design
    • Solid state UV cross-linking >
      • Solid-state heating cross-linking
    • Additive manufacturing增材制造 >
      • 3D/4D printing 打印
      • Rapid 3D printing in solid state 快速固态3D打印 >
        • Rapid volumetric additive manufacturing in solid-state: hydrogels
        • UV cross-linkable vitrimer 2022
        • UV cross-linking of solid material
        • UV cross-linking machine
        • Solid-state VAM (3D)
        • SVAM: A brief history
        • Review of Solid state VAM by AI
      • New ways of additive manufacturing (animation)
      • UV-FDM printer
      • Cooling-responsive shape memory hydrogel via FDM
      • 3D fashion >
        • Formation of 3D structures
    • Shape capture
    • Surface capture >
      • Surface pattern for structural coloring
  • Store room
    • References/tools >
      • 3D models >
        • More STL models
        • 生肖
        • 3D printing service
      • Sample dimensions for tensile test
      • Temperature calibration
      • Toolbox工具箱
      • Toolbox II (工具箱 II)
    • Jungle >
      • About polymers >
        • Thermally reversible solid-liquid transition
        • Cyclic loading
        • Mullins effect
        • Photoelsticity 光弹
        • Shear-thickening 剪切增强 >
          • 4 CNA
        • Closed to open cell foams
        • Laser induced graphene
        • Electrospinning
        • Nano imprinting
        • Gel 凝胶 >
          • Instability in wetting of hydrogel
          • Electroactive gel电活性凝胶
        • Cellulose 纤维素
        • Plastic bottle 塑料瓶
        • Polymer recycling
        • Rapid swelling 快速溶胀
        • Rapid hardening in water
        • Patterns
        • Brittle-ductile transition
        • Tan delta >
          • Re-programmable Tan delta
        • UV cross-linking
        • Hardening speed
      • Coloring 变色 >
        • Structural coloring atop curved surfaces
        • Thermochromic 热致变色
        • Photochromic 光致变色
        • Stress induced color change力致变色 >
          • Patterned coloring via stretching 拉出色彩
      • Moire interference 莫尔干涉
      • Lenticular lens
      • Transformation front
      • Contact angle vs surface pattern
      • Laser: applications
      • Insects 昆虫
      • Structural engineer >
        • Static and Dynamic Balancing
        • Introduction videos
        • Bistable structures: a case study >
          • 3D printing of bistable structures
          • Step-wise morphing
        • Yield criterion >
          • Normalized yield surface via GPU
          • Yield surface of SMAs and beyond
        • Buckling of embedded threads
        • Buckling of embedded strip
        • Buckling of strip atop soft substrate
        • Foam structures for packaging
      • Interesting >
        • Exhibition
        • Ideas
      • Experimental >
        • Tensile test
        • Differential Scanning Calorimetry (DSC) Procedure
        • Dynamic Mechanical Analysis (DMA) Procedure
        • Shape Memory Performance Characterization Procedure for Shape Memory Polymers
      • ChatGPT 4 fun
      • 智谱测试
  • Contact
    • SMM course
    • Representative publications
    • Projects of undergraduate students
    • List of videos
    • Special issues| Conferences
    • Companies
    • References