A versatile uniaxial benchtop mechanical tester
The UStretch provides an economical way to carry out uniaxial tests on soft materials. Easy to use software allows the user to define simple or complex force or displacement protocols. The temperature-controlled bath option is ideal for biological and other environment-sensitive materials, while the camera option makes it possible to track and analyze specimen deformation. Multiple attachment options are available, including CellScale’s patented BioRakes.
Features:
- Quality, cost-effective testing
- Quick and easy to use
- Multiple attachment options
- Available imaging system and image analysis software toolkit
- Available temperature-controlled media bath and pivot stand
- Specimen Size: 3X3mm to 20X100mm
- Load Cell Capacities (N): 0.5, 1.0, 2.5, 4.5, 8.9, 23, 45, 111
- Load Cell Accuracies: 0.2% of capacity
- Max Displacement Rate: 50mm/s
- Image Rate: 15Hz
- Image Resolution: 1280 X 960 pixels
- Max. Temperature: 40°C
BioRake
The patented BioRake attachment system allows specimens to be mounted quickly and precisely.
<img class="prod-image-sm" data-cke-saved-src="http://cellscale.com/images/our-company/ustretch2.png" src="http://cellscale.com/images/our-company/ustretch2.png" alt="UStretch mechanical clamp jaws/>
Mechanical Grip
The mechanical grip attachment system facilitates higher forces and test-to-failure.
Software
Integrated software makes it easy to specify test protocols, whether simple or complex. Test protocols can be saved and modified. Real-time force and displacement graphing facilitates test validation.
The UStretch software is built on the same platform as the BioTester software.
Imaging System
Optional imaging system and analysis software allows images to be analyzed to verify specimen strains and strain uniformity.
生物材料力學試驗機是指應用于生物材料如生物軟組織，如肌腱、韌帶、血管、神經、瓣膜、軟骨、骨膜、肌膜、皮膚、腸膜、膠原蛋白和水凝膠等生物材料等等材料拉伸壓縮三點彎曲剪切等測試儀器設備。測試生物軟組織和生物材料應力應變、彈性變形、彈性極限、彈性模量、屈服強度、塑性變形、斷裂強度、延伸率等等測試。在名稱上又可以稱為生物材料力學試驗機，生物材料拉力測試機，或生物材料*材料試驗機等。
由于軟組織和生物材料的特殊性，在實際測試中經常遇到的兩個問題，米力光貿易CO.闡述一下解決方案，如肌腱腱韌帶血管骨膜角膜皮膚生物軟組織測試拉伸夾頭工裝固定裝置和精確的應變測量裝置。
生物力學材料試驗機拉力固定裝置，目前一般采用的手動式或氣動式固定裝置。在生物力學實驗中經常會碰到生物軟組織夾頭固定的難題。以往的夾持方法都是采用堅硬的金屬夾具或氣壓對組織塊進行鉗夾,對于硬度高或形狀規(guī)則的樣品測試還可行,但對于生物軟組織如肌肉、肌腱、韌帶、血管、神經、黏膜、骨膜、腹膜、腸膜、皮膚等就很難。軟組織柔軟濕滑的特性使其被穩(wěn)固夾持非常困難。傳統(tǒng)方法是利用夾具與軟組織之間接觸面產生的摩擦力來發(fā)揮作用的,如手動式或氣動是拉伸固定裝置，而生物軟組織具有強烈的黏彈特性,摩擦力僅僅是作用于其表面,其內部受力與外部受力是不同的。在夾持固定的過程中勢必形成應力集中導致軟組織的打滑脫落和損傷,所以采用zui直接簡單有效的夾頭固定裝置，變得越來越重要。如圖所示：生物軟組織測試方法，用平行的鉤子直接有效固定，是zui簡單直接的有效方法。
